A method and device for determining performance acceptance indexes of a turboshaft engine

Abstract

The present application relates to the technical field of engine performance evaluation, and discloses a method and device for determining performance acceptance indexes of turboshaft engines, which comprises the following steps: obtaining test data of multiple turboshaft engines, determining temperature conversion coefficients, pressure conversion coefficients and humidity correction coefficients based on the test data of the multiple turboshaft engines; determining conversion performance parameters of acceptance power states of each turboshaft engine based on the temperature conversion coefficients, the pressure conversion coefficients and the humidity correction coefficients; determining maximum slope coefficients based on the conversion performance parameters of the acceptance power states of each turboshaft engine, and determining maximum allowable parameters of adjacent acceptance power states according to the maximum slope coefficients with the maximum allowable parameter of the maximum continuous power state as a reference; and determining performance acceptance indexes of turboshaft engines based on the maximum allowable parameter of the maximum continuous power state and the maximum allowable parameters of the adjacent acceptance power states. The present application ensures the accuracy of the performance acceptance indexes of turboshaft engines.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine performance evaluation, in particular to a method and device for determining performance acceptance indexes of turboshaft engines. BACKGROUND

[0002] Performance acceptance of an aero-engine refers to obtaining performance data of the engine in a specified state through ground bench testing, and evaluating whether the performance data meets the requirements of performance acceptance indexes.

[0003] Generally, performance acceptance indexes of turboshaft engines specify the performance level of the engine under standard atmospheric conditions, sea level, no humidity or low humidity, and the curve with the converted power as the horizontal coordinate clearly indicates the maximum allowable parameters corresponding to the converted power, including the maximum allowable converted rotational speed, the maximum allowable converted temperature at the outlet of the gas turbine, and the maximum allowable converted specific fuel consumption. The converted specific fuel consumption is obtained by dividing the converted fuel flow rate by the converted power. In the performance acceptance indexes, the converted power at least includes the rated power in the take-off state and the maximum continuous state, and the maximum allowable parameters corresponding to the rated power can be determined by setting a certain attenuation margin on the basis of the specified limit value. However, considering that the engine can only be pushed to a lower converted power state under hot weather conditions, the performance acceptance indexes should also include a lower converted power and the corresponding maximum allowable parameters.

[0004] However, the related method for determining performance acceptance indexes of turboshaft engines cannot guarantee the accuracy of the performance acceptance indexes of turboshaft engines, and the performance acceptance indexes of turboshaft engines do not meet the preset index requirements, which may cause unqualified engines to be delivered, or may cause qualified engines to be unable to be delivered due to unreasonable determination of the acceptance indexes, resulting in unnecessary performance control costs. SUMMARY

[0005] Therefore, the present application provides a method and device for determining performance acceptance indexes of turboshaft engines to solve the problem that the related method for determining performance acceptance indexes of turboshaft engines cannot guarantee the accuracy of the performance acceptance indexes of turboshaft engines, the performance acceptance indexes of turboshaft engines do not meet the preset index requirements, and unnecessary performance control costs are generated.

[0006] In a first aspect, the present application provides a method for determining performance acceptance indexes of turboshaft engines, which comprises:

[0007] obtaining test data of multiple turboshaft engines, and determining temperature conversion coefficients, pressure conversion coefficients, and humidity correction coefficients based on the test data of the multiple turboshaft engines;

[0008] determining converted performance parameters of the acceptance power state of each turboshaft engine based on the temperature conversion coefficients, the pressure conversion coefficients, and the humidity correction coefficients.

[0009] The maximum slope coefficient is determined based on the conversion performance parameters of each turboshaft engine in the acceptance power state, and the maximum allowable parameter in the maximum continuous power state is taken as the reference to determine the maximum allowable parameter in the adjacent acceptance power state according to the maximum slope coefficient;

[0010] The turboshaft engine performance acceptance index is determined based on the maximum allowable parameter in the maximum continuous power state and the maximum allowable parameter in the adjacent acceptance power state, wherein the turboshaft engine performance acceptance index is used to evaluate the performance level of the turboshaft engine.

[0011] The method for determining the turboshaft engine performance acceptance index provided in the embodiment determines the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient based on the test data of multiple turboshaft engines, fully considers the influence of the machining dispersion, effectively improves the accuracy of the conversion performance parameters of each turboshaft engine in the acceptance power state, and takes the maximum allowable parameter in the maximum continuous power state as the reference to determine the maximum allowable parameter in the adjacent acceptance power state according to the maximum slope coefficient, thereby ensuring the accuracy of the turboshaft engine performance acceptance index and the comprehensiveness and efficiency of the turboshaft engine performance acceptance index determination process, effectively avoiding the situation that the performance in the low conversion power state is qualified under hot weather conditions, but the performance in the actual high conversion power state does not meet the requirements, and also avoiding the situation that the performance acceptance index in the low conversion power state is too strict, thereby reducing the cost.

[0012] In an optional implementation, the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient are determined based on the test data of multiple turboshaft engines, including:

[0013] The test data of the multiple turboshaft engines are divided into multiple groups of conversion performance data based on the preset pressure variation threshold, the preset humidity content variation threshold and at least two test data of the same turboshaft engine, and the temperature conversion coefficient is determined based on the multiple groups of conversion performance data, wherein each group of conversion performance data is the conversion performance data of the same turboshaft engine under the same conversion speed state and different atmospheric temperatures;

[0014] The test data of the multiple turboshaft engines are divided into multiple groups of conversion performance data based on the preset humidity content variation threshold and at least two test data of the same turboshaft engine, and the pressure conversion coefficient is determined based on the multiple groups of conversion performance data, wherein each group of conversion performance data is the conversion performance data of the same turboshaft engine under the same conversion speed state and different atmospheric pressures;

[0015] The test data of the plurality of turboshaft engines is divided into a plurality of sets of conversion performance data based on at least two test data of the same turboshaft engine, and the humidity correction coefficient is determined based on the plurality of sets of conversion performance data; wherein each set of conversion performance data is conversion performance data of the same turboshaft engine under the same conversion speed state and different atmospheric humidity.

[0016] The method for determining the performance acceptance index of the turboshaft engine provided in the embodiment divides the test data of the plurality of turboshaft engines into a plurality of sets of conversion performance data, and re-determines the pressure conversion coefficient, the temperature conversion coefficient and the humidity correction coefficient based on the plurality of sets of conversion performance data, comprehensively considers the influences of the atmospheric temperature, the atmospheric pressure, the atmospheric humidity and the processing dispersion on the conversion of the performance data and the conversion performance change slope, makes the performance acceptance index of the turboshaft engine more accurate, and in combination with the ground bench test data, can evaluate the influence of the processing dispersion, and can more conveniently improve the humidity correction coefficient. The ground bench test data is derived from the existing test tasks in the development stage, has no special requirements for the test equipment, is low in cost, has a large amount of data samples, and reduces the determination cost of the performance acceptance index.

[0017] Compared with the existing turboshaft engine performance data conversion formula, the pressure conversion coefficient and the temperature conversion coefficient change with the atmospheric conditions, and the humidity correction coefficient is optimized, and the accuracy of the performance data conversion result is higher

[0018] In an optional implementation, the temperature conversion coefficient is determined based on the plurality of sets of conversion performance data, and the method comprises the following steps:

[0019] An initial slope coefficient is obtained, the initial slope coefficient is iterated according to a preset iteration step, and in the iteration process of the initial slope coefficient, the cumulative error corresponding to each set of conversion performance data is calculated;

[0020] The cumulative errors corresponding to the plurality of sets of conversion performance data are sorted, and the minimum cumulative error is determined;

[0021] The atmospheric temperature and the initial conversion coefficient are obtained, and the temperature conversion coefficient is calculated based on the slope coefficient corresponding to the minimum cumulative error, the atmospheric temperature and the initial conversion coefficient.

[0022] The method for determining the performance acceptance index of the turboshaft engine provided in the embodiment calculates the cumulative error corresponding to each set of conversion performance data in the iteration process of the initial slope coefficient, and calculates the temperature conversion coefficient based on the slope coefficient corresponding to the minimum cumulative error, the atmospheric temperature and the initial conversion coefficient, so that the influences of the atmospheric temperature and the processing dispersion on the conversion performance change slope are fully considered in the calculation process of the temperature conversion coefficient, and the conversion performance parameters of each turboshaft engine are more accurate.

[0023] In an alternative embodiment, the conversion performance parameters of each turboshaft engine in the acceptance power state are determined based on the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient, including:

[0024] The conversion performance parameters of each turboshaft engine in the conversion speed state are determined based on the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient.

[0025] Based on the conversion performance parameters of each turboshaft engine in the conversion speed state, the conversion performance parameters of each turboshaft engine in the acceptance power state are determined by linear interpolation.

[0026] The method for determining the performance acceptance index of the turboshaft engine provided in this embodiment converts the conversion performance parameters of each turboshaft engine in the conversion speed state into the conversion performance parameters of each turboshaft engine in the acceptance power state by linear interpolation, which lays a foundation for directly using the conversion performance parameters of each turboshaft engine in the acceptance power state for determining the performance acceptance index.

[0027] In an alternative embodiment, the conversion performance parameters of each turboshaft engine in the acceptance power state are determined based on the conversion performance parameters of each turboshaft engine in the conversion speed state by linear interpolation, including:

[0028] An acceptance power value is obtained, and the adjacent power value of the acceptance power value and the conversion performance parameter corresponding to the adjacent power value are determined based on the conversion performance parameters of each turboshaft engine in the conversion speed state.

[0029] The conversion performance parameters of each turboshaft engine in the acceptance power state are calculated based on the acceptance power value, the adjacent power value, and the conversion performance parameter corresponding to the adjacent power value.

[0030] The method for determining the performance acceptance index of the turboshaft engine provided in this embodiment determines the adjacent power value of the acceptance power value and the conversion performance parameter corresponding to the adjacent power value, which realizes accurate calculation of the conversion performance parameters of each turboshaft engine in the acceptance power state and lays a foundation for determining the slope coefficient of the conversion performance parameter varying with power between adjacent acceptance power states.

[0031] In an alternative embodiment, the maximum slope coefficient is determined based on the conversion performance parameters of each turboshaft engine in the acceptance power state, and the maximum allowable parameter of the maximum continuous power state is taken as a reference to determine the maximum allowable parameter of the adjacent acceptance power state according to the maximum slope coefficient, including:

[0032] The slope coefficient of the conversion performance parameter varying with power between adjacent acceptance power states is determined based on the conversion performance parameters of each turboshaft engine in the acceptance power state, and the maximum slope coefficient among the slope coefficients of the conversion performance parameter varying with power between adjacent acceptance power states is selected.

[0033] determining the maximum allowable parameter of the first acceptance power state according to the maximum slope coefficient based on the maximum allowable parameter of the maximum continuous power state; wherein the first acceptance power state is an adjacent power state of the maximum continuous power state, and the first acceptance power state is less than the maximum continuous power state.

[0034] determining the maximum allowable parameter of the second acceptance power state according to the maximum slope coefficient based on the maximum allowable parameter of the first acceptance power state; wherein the second acceptance power state is an adjacent power state of the first acceptance power state, and the second acceptance power state is less than the first acceptance power state.

[0035] The method for determining the performance acceptance index of the turboshaft engine provided in the embodiment can effectively avoid the situation that the performance of the low conversion power state is qualified in hot weather conditions, but the performance of the actual high conversion power state does not meet the requirements, and can also avoid the situation that the performance acceptance index of the low conversion power state is too strict.

[0036] In an optional implementation, the maximum allowable parameter includes a maximum allowable conversion speed, a maximum allowable gas turbine outlet conversion temperature, and a maximum allowable conversion specific fuel consumption.

[0037] In a second aspect, the present application provides a device for determining a performance acceptance index of a turboshaft engine, which comprises:

[0038] A first determining module is configured to obtain test data of a plurality of turboshaft engines, and determine a temperature conversion coefficient, a pressure conversion coefficient, and a humidity correction coefficient based on the test data of the plurality of turboshaft engines.

[0039] A second determining module is configured to determine conversion performance parameters of acceptance power states of each turboshaft engine based on the temperature conversion coefficient, the pressure conversion coefficient, and the humidity correction coefficient.

[0040] A third determining module is configured to determine a maximum slope coefficient based on the conversion performance parameters of the acceptance power states of each turboshaft engine, and determine a maximum allowable parameter of an adjacent acceptance power state according to the maximum slope coefficient based on a maximum allowable parameter of a maximum continuous power state.

[0041] A fourth determining module is configured to determine a performance acceptance index of the turboshaft engine based on the maximum allowable parameter of the maximum continuous power state and the maximum allowable parameter of the adjacent acceptance power state; wherein the performance acceptance index of the turboshaft engine is used to evaluate the performance level of the turboshaft engine.

[0042] In a third aspect, the present application provides a computer device, comprising a memory and a processor, the memory and the processor being communicatively connected with each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the method for determining the acceptance index of the turboshaft engine performance according to the first aspect or any one of the corresponding embodiments thereof.

[0043] In a fourth aspect, the present application provides a computer readable storage medium, which stores computer instructions for causing a computer to perform the method for determining the acceptance index of the turboshaft engine performance according to the first aspect or any one of the corresponding embodiments thereof. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0045] Figure 1 is a schematic diagram of the maximum allowable converted speed corresponding to the converted power in the acceptance index of the related turboshaft engine performance;

[0046] Figure 2 is a schematic diagram of the maximum allowable converted temperature at the outlet of the gas turbine corresponding to the converted power in the acceptance index of the related turboshaft engine performance according to an embodiment of the present application;

[0047] Figure 3 is a schematic diagram of the maximum allowable converted specific fuel consumption corresponding to the converted power in the acceptance index of the related turboshaft engine performance according to an embodiment of the present application;

[0048] Figure 4 is a flowchart of a method for determining the acceptance index of a turboshaft engine performance according to an embodiment of the present application;

[0049] Figure 5 is a flowchart of another method for determining the acceptance index of a turboshaft engine performance according to an embodiment of the present application;

[0050] Figure 6 is a flowchart of still another method for determining the acceptance index of a turboshaft engine performance according to an embodiment of the present application;

[0051] Figure 7 is a schematic diagram of the maximum allowable converted speed corresponding to the converted power in the acceptance index of the turboshaft engine performance according to an embodiment of the present application;

[0052] Figure 8 is a schematic diagram of the maximum allowable gas turbine outlet corrected temperature corresponding to the corrected power in the performance acceptance index of the turboshaft engine according to an embodiment of the present application;

[0053] Figure 9 is a schematic diagram of the maximum allowable corrected specific fuel consumption corresponding to the corrected power in the performance acceptance index of the turboshaft engine according to an embodiment of the present application;

[0054] Figure 10 is a flowchart of another method for determining the performance acceptance index of the turboshaft engine according to an embodiment of the present application;

[0055] Figure 11 is a schematic diagram of the corrected fuel flow at different atmospheric temperatures in the performance data of the turboshaft engine;

[0056] Figure 12 is a schematic diagram of the gas turbine outlet corrected temperature at different atmospheric temperatures in the performance data of the turboshaft engine;

[0057] Figure 13 is a schematic diagram of the corrected power of the turboshaft engine at different humidity conditions in the performance data of the turboshaft engine;

[0058] Figure 14 is a schematic diagram of the corrected fuel flow at different atmospheric temperatures according to an embodiment of the present application;

[0059] Figure 15 is a schematic diagram of the gas turbine outlet corrected temperature at different atmospheric temperatures according to an embodiment of the present application;

[0060] Figure 16 is a schematic diagram of the corrected power of the turboshaft engine at different humidity conditions according to an embodiment of the present application;

[0061] Figure 17 is a comparative schematic diagram of the corrected rotational speed according to an embodiment of the present application;

[0062] Figure 18 is a comparative schematic diagram of the gas turbine outlet corrected temperature according to an embodiment of the present application;

[0063] Figure 19 is a comparative schematic diagram of the corrected specific fuel consumption according to an embodiment of the present application;

[0064] Figure 20 is a structural block diagram of a device for determining the performance acceptance index of the turboshaft engine according to an embodiment of the present application;

[0065] Figure 21 is a hardware structure schematic diagram of the computer device according to an embodiment of the present application. DETAILED DESCRIPTION

[0066] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0067] like Figures 1-3 As shown, the curve with converted power as the horizontal axis clearly defines the maximum permissible parameters corresponding to the converted power, including the maximum permissible converted speed, the maximum permissible converted gas turbine outlet temperature, and the maximum permissible converted fuel consumption rate. The converted fuel consumption rate is obtained by dividing the converted fuel flow rate by the converted power. The performance acceptance index is formed by connecting the coordinate points corresponding to several acceptance power states. The acceptance power states include at least the takeoff state and the maximum continuous state. Considering that the engine can only be pushed up to a lower converted power state under hot weather conditions, the acceptance power states should also include low power states, such as the 75% maximum continuous power state and the 50% maximum continuous power state.

[0068] The main challenges in determining the performance acceptance criteria for turboshaft engines are as follows:

[0069] 1) The maximum permissible parameters corresponding to the takeoff state and the maximum continuous state are generally determined based on the engine's usage limit value, with a certain attenuation margin. For the lower acceptance power state, the impact of manufacturing dispersion on engine performance acceptance must be considered. This is because manufacturing dispersion will cause the curve of the converted performance parameters to change with the converted power, which may result in a situation where the performance is better in the low converted power state but does not meet the requirements in the high converted power state.

[0070] 2) Performance data obtained from ground-based bench tests must first be converted to performance data under standard atmospheric, sea-level, and low- or no-humidity conditions before comparison with performance acceptance criteria. Considering that turboshaft engines are controlled based on a constant physical turbine speed, which does not conform to general similarity conversion criteria, the temperature and pressure conversion coefficients in the conversion formulas for performance parameters such as power, gas turbine outlet temperature, and fuel flow rate will be corrected, but remain constants. However, in reality, the temperature and pressure conversion coefficients vary with atmospheric conditions, and the conversion coefficients for different engines will also differ due to manufacturing variations. Therefore, the accuracy of the performance data conversion formulas needs further improvement. Additionally, the influence of humidity will be considered in engineering applications.

[0071] To address the two difficulties mentioned above, the following measures were mainly taken:

[0072] 1) Establish the whole machine performance simulation model, determine the maximum allowable parameters of lower acceptance power state; obtain the performance data under different atmospheric conditions, and iteratively determine the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient;

[0073] 2) Conduct high-altitude table test, obtain the performance data under sea level, standard sky, no humidity or low humidity conditions, obtain the slope of the conversion performance parameters of the test engine with the change of conversion power, and further determine the maximum allowable parameters of lower acceptance power state; obtain the performance measured data under different atmospheric conditions, and iteratively determine the pressure conversion coefficient, the temperature conversion coefficient and the humidity correction coefficient.

[0074] However, the above measures have the following disadvantages:

[0075] 1) In the performance data conversion formula currently used in engineering applications, the pressure conversion coefficient and the temperature conversion coefficient are constants, and the influence of atmospheric condition change and processing dispersion on the conversion coefficient is not considered;

[0076] 2) The calculation results of the whole machine performance simulation model are used to determine the maximum allowable parameters of lower acceptance power state and the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient, and the performance simulation model needs to have high calculation accuracy, and the accuracy of the model often needs to be verified by a large amount of verification, especially the correction of the power turbine characteristics needs to consume a lot of effort, and the influence on the calculation accuracy is very obvious;

[0077] 3) The high-altitude table test results are used to determine the maximum allowable parameters of lower acceptance power state and the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient, and the equipment needs to have the ability of temperature adjustment, humidity adjustment, humidity removal and the like, which is expensive, and generally only the temperature conversion coefficient and the pressure conversion coefficient are researched under the condition of humidity removal, and if the high-altitude table test of multiple engines is conducted to analyze the influence of processing dispersion, the cost will be very high.

[0078] In view of the above-mentioned shortcomings, the embodiment of the present application provides a determination method of performance acceptance index of turboshaft engine, which can be used for server type equipment.

[0079] According to the embodiment of the present application, a determination method of performance acceptance index of turboshaft engine is provided, and it should be noted that the steps shown in the flowchart can be executed in a computer system such as a group of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in different order from here.

[0080] In the embodiment, a determination method of performance acceptance index of turboshaft engine is provided, which can be used for the above-mentioned server type equipment, Figure 4 is a flowchart of a determination method of performance acceptance index of turboshaft engine according to the embodiment of the present application,Figure 4 As shown, the flow includes the following steps:

[0081] In step S401, test data of multiple turbo-shaft engines are acquired, and temperature conversion coefficients, pressure conversion coefficients and humidity correction coefficients are determined based on the test data of the multiple turbo-shaft engines.

[0082] Specifically, the development of an aero-engine has the characteristics of multiple test subjects, long test time and multiple engine units, and therefore a large amount of test data of multiple samples is accumulated in the development process.

[0083] Further, in the ground bench test or sea level condition test of the turbo-shaft engine at high altitude, the actual conversion speed state is generally selected for performance recording in view of the actual conversion parameter state, wherein the actual conversion speed can be 90%, 92%, 95%, 97.5% and 100% of the full speed. The conversion performance parameters corresponding to the actual conversion speed state include the conversion power, the gas turbine outlet conversion temperature and the conversion fuel flow.

[0084] In step S402, the conversion performance parameters of the acceptance power state of each turbo-shaft engine are determined based on the temperature conversion coefficients, the pressure conversion coefficients and the humidity correction coefficients.

[0085] Specifically, referring to the turbo-shaft engine performance data conversion formula, a formula for the conversion performance parameters considering humidity correction is established:

[0086]

[0087] In the above formula, D h,d is the humidity-corrected conversion performance parameter, including the conversion speed, the conversion power, the gas turbine outlet conversion temperature and the conversion fuel flow, D is the actual performance parameter, including the actual speed, the actual power, the actual gas turbine outlet temperature and the actual fuel flow, T0 is the atmospheric temperature, P0 is the atmospheric pressure, β is the temperature conversion coefficient, γ is the pressure temperature conversion coefficient, and CH is the humidity correction coefficient.

[0088] Further, since the temperature conversion coefficient and the pressure temperature conversion coefficient in the above formula (2) are constants, the influence of atmospheric condition changes and processing dispersion on the conversion coefficients is not considered, resulting in inaccurate humidity-corrected conversion performance parameters. Therefore, the temperature conversion coefficient β, the pressure conversion coefficient γ and the humidity correction coefficient CH in the conversion process of the conversion power, the gas turbine outlet conversion temperature and the conversion fuel flow are re-determined based on the test data of multiple turbo-shaft engines, and the conversion performance parameters are optimized.

[0089] Further, assuming that the temperature conversion coefficient varies linearly with the atmospheric temperature, the pressure conversion coefficient varies linearly with the atmospheric pressure, and the humidity correction coefficient is optimized according to the test data analysis result, the temperature conversion coefficient β, the pressure conversion coefficient γ, and the humidity correction coefficient CH are re-determined.

[0090] In step S403, the maximum slope coefficient is determined based on the conversion performance parameters of each turbo-shaft engine acceptance power state, and the maximum allowable parameter of the maximum continuous power state is taken as a reference to determine the maximum allowable parameter of the adjacent acceptance power state according to the maximum slope coefficient.

[0091] Specifically, the maximum allowable parameter includes the maximum allowable conversion speed, the maximum allowable gas turbine outlet conversion temperature, and the maximum allowable conversion fuel consumption rate.

[0092] In step S404, the turbo-shaft engine performance acceptance index is determined based on the maximum allowable parameter of the maximum continuous power state and the maximum allowable parameter of the adjacent acceptance power state; wherein the turbo-shaft engine performance acceptance index is used to evaluate the performance level of the turbo-shaft engine.

[0093] Specifically, the maximum allowable parameter of the adjacent acceptance power state is determined in turn based on the maximum allowable parameter of the maximum continuous power state, and finally the complete turbo-shaft engine performance acceptance index is obtained.

[0094] The determination method of the turbo-shaft engine performance acceptance index provided in this embodiment determines the temperature conversion coefficient, the pressure conversion coefficient, and the humidity correction coefficient based on the test data of multiple turbo-shaft engines, fully considers the influence of the machining dispersion, effectively improves the accuracy of the conversion performance parameters of each turbo-shaft engine acceptance power state, and determines the maximum allowable parameter of the adjacent acceptance power state based on the maximum allowable parameter of the maximum continuous power state according to the maximum slope coefficient, thereby ensuring the accuracy of the turbo-shaft engine performance acceptance index and the comprehensiveness and efficiency of the determination process of the turbo-shaft engine performance acceptance index, effectively avoiding the situation that the performance of the low conversion power state is qualified under hot weather conditions, but the actual high conversion power state performance does not meet the requirements, and also avoiding the situation that the performance acceptance index of the low conversion power state is too strict, thereby reducing the cost.

[0095] In this embodiment, a determination method of a turbo-shaft engine performance acceptance index is provided, which can be used for the server-type device described above, Figure 5 is a flowchart of a determination method of a turbo-shaft engine performance acceptance index according to an embodiment of the present application, as shown in the figure, the flowchart includes the following steps: Figure 5

[0096] ​Step S501, obtaining test data of multiple turboshaft engines, and determining a temperature conversion coefficient, a pressure conversion coefficient and a humidity correction coefficient based on the test data of the multiple turboshaft engines.

[0097] Specifically, the step S501 includes:

[0098] Step S5011, dividing the test data of the multiple turboshaft engines into multiple groups of conversion performance data based on a preset pressure change threshold, a preset humidity content change threshold and at least two test data of the same turboshaft engine, and determining the temperature conversion coefficient based on the multiple groups of conversion performance data; wherein each group of conversion performance data is conversion performance data of the same turboshaft engine under the same conversion speed state and different atmospheric temperatures.

[0099] Specifically, since the atmospheric pressure changes little during the ground bench test, the humidity correction coefficient has considered the engine characteristics, and the influence of humidity change on performance is relatively small, the temperature conversion coefficient β is determined preferentially.

[0100] Further, the test data of the multiple turboshaft engines is divided into multiple groups of conversion performance data based on the condition that the atmospheric pressure change is not more than 0.5 kPa (kilopascal), the humidity content change is not more than 1%, and at least two test data of the same engine are included.

[0101] In some optional embodiments, the step S5011 includes:

[0102] Step a1, obtaining an initial slope coefficient, iterating the initial slope coefficient according to a preset iteration step, and calculating a cumulative error corresponding to each group of conversion performance data during the iteration of the initial slope coefficient.

[0103] Specifically, the range of the temperature conversion coefficient β is β±δ1, δ1 is valued according to experience, the initial slope coefficient is valued as 0, a suitable iteration step is determined, which can be generally taken as 0.01, and the value of the initial slope coefficient is increased or decreased.

[0104] Further, during the iteration of the initial slope coefficient, the cumulative error of the conversion performance data of the same turboshaft engine under the same conversion speed state and different atmospheric temperatures and the average value thereof is calculated, when the slope coefficient is increased and the cumulative error is increased, the slope coefficient is decreased until the minimum cumulative error is obtained, and the slope coefficient corresponding to the minimum cumulative error is taken as the slope coefficient a corresponding to the temperature conversion coefficient; wherein the calculation formula of the cumulative error ε is as follows:

[0105]

[0106] In the above formula, l is the number of selected turboshaft engine units, m is the number of test times, n is the number of actual conversion speed states, D h,trendThe conversion performance parameter of the actual conversion speed state of the turboshaft engine, i.e., the conversion performance data of the same turboshaft engine at the same conversion speed state and different atmospheric temperatures, is obtained by general similarity conversion. h,trend The conversion performance parameter of the actual conversion speed state of the turboshaft engine, i.e., the conversion performance data of the same turboshaft engine at the same conversion speed state and different atmospheric temperatures, is obtained by general similarity conversion. h,ave，i The conversion performance parameter of the actual conversion speed state of the turboshaft engine, i.e., the conversion performance data of the same turboshaft engine at the same conversion speed state and different atmospheric temperatures, is obtained by general similarity conversion.

[0107] Step a2, sort the cumulative errors corresponding to each group of conversion performance data to determine the minimum cumulative error.

[0108] Step a3, obtain the atmospheric temperature and the initial conversion coefficient, and calculate the temperature conversion coefficient based on the slope coefficient corresponding to the minimum cumulative error, the atmospheric temperature and the initial conversion coefficient.

[0109] Specifically, the slope coefficient corresponding to the minimum cumulative error is the slope coefficient corresponding to the temperature conversion coefficient, and the calculation formula of the temperature conversion coefficient β is:

[0110] β=a×(T0+273.15-288.15)+β0 (3)

[0111] In the above formula, a represents the slope coefficient corresponding to the temperature conversion coefficient, and β0 represents the temperature conversion coefficient obtained by general similarity conversion.

[0112] Step S5012, under the condition of a preset humidity content change threshold and at least two test data of the same turboshaft engine, the test data of the plurality of turboshaft engines is divided into a plurality of groups of conversion performance data, and the pressure conversion coefficient is determined based on the plurality of groups of conversion performance data; wherein each group of conversion performance data is the conversion performance data of the same turboshaft engine at the same conversion speed state and different atmospheric pressures.

[0113] Specifically, under the condition that the humidity content change does not exceed 1% and at least two test data of the same engine are included, the test data of the plurality of turboshaft engines is divided into a plurality of groups of conversion performance data, i.e., the conversion performance data of the same turboshaft engine at the same conversion speed state and different atmospheric pressures.

[0114] Further, the range of the pressure conversion coefficient γ is limited to γ±δ2, and δ2 is valued according to experience; the initial value of the slope coefficient is taken as 0, a suitable iteration step is determined, and the value of the initial slope coefficient is increased or decreased; the cumulative error of the conversion performance data of the same turboshaft engine at the same conversion speed state and different atmospheric pressures in each group relative to the average value thereof is calculated, the calculation formula of the cumulative error is the same as the above formula (2), and the slope coefficient corresponding to the minimum cumulative error is taken as the slope coefficient b corresponding to the pressure conversion coefficient.

[0115] Further, the calculation formula of the pressure conversion coefficient γ is as follows:

[0116] γ = b x (P0- 101.325) + γ0 (4)

[0117] In the above formula, b represents the slope coefficient corresponding to the pressure conversion coefficient, and γ0 represents the pressure conversion coefficient obtained by general similarity conversion.

[0118] Step S5013, based on the test data of at least two tests of the same turboshaft engine, the test data of multiple turboshaft engines is divided into multiple groups of conversion performance data, and the humidity correction coefficient is determined based on the multiple groups of conversion performance data; wherein each group of conversion performance data is the conversion performance data of the same turboshaft engine under the same conversion speed state and different atmospheric humidity.

[0119] Specifically, after determining the temperature and pressure conversion coefficients, the humidity correction coefficients of power, gas turbine outlet temperature and fuel flow are determined: determine the appropriate iteration step, increase or decrease the value of the initial slope coefficient; calculate the cumulative error of the conversion performance data of the same turboshaft engine under the same conversion speed state and different atmospheric humidity in each group relative to its average value, the calculation formula of the cumulative error is the same as formula (2) above, and the slope coefficient corresponding to the minimum cumulative error is taken as the slope coefficient c corresponding to the humidity correction coefficient.

[0120] Further, the calculation formula of the humidity correction coefficient CH is as follows:

[0121] CH = c x R d + 1 (5)

[0122] In the above formula, R d represents the atmospheric humidity.

[0123] Step S502, based on the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient, the conversion performance parameters of the acceptance power state of each turboshaft engine are determined.

[0124] Specifically, the above step S502 includes:

[0125] Step S5021, based on the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient, the conversion performance parameters of the conversion speed state of each turboshaft engine are determined.

[0126] Specifically, the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient calculated by the above formulas (3)-(5) are input into formula (1), and the optimized conversion performance parameters of the conversion speed state of each turboshaft engine are calculated.

[0127] Step S5022, determining the conversion performance parameters of the acceptance power state of each turboshaft engine based on the conversion performance parameters of the conversion speed state of each turboshaft engine by linear interpolation.

[0128] In some optional embodiments, the step S5022 includes:

[0129] Step b1, obtaining the acceptance power value, determining the adjacent power value of the acceptance power value and the conversion performance parameters corresponding to the adjacent power value based on the conversion performance parameters of the conversion speed state of each turboshaft engine.

[0130] Step b2, calculating the conversion performance parameters of the acceptance power state of each turboshaft engine based on the acceptance power value, the adjacent power value, and the conversion performance parameters corresponding to the adjacent power value.

[0131] Specifically, the conversion performance parameters D h,st of the acceptance power state of each turboshaft engine are calculated according to the following formula:

[0132]

[0133] In the above formula, D h,st is the conversion performance parameter of the acceptance power state of each turboshaft engine, including the conversion speed, the conversion temperature at the outlet of the gas turbine, and the conversion fuel flow, and the conversion specific fuel consumption is obtained by dividing the conversion fuel flow by the conversion power; P h,trend,1 , P h,trend,2 is the adjacent power value of the acceptance power value, D h,trend,1 , D h,trend,2 is the conversion performance parameter corresponding to the adjacent power value; P h,st is the acceptance power value, which generally includes at least the power values corresponding to the take-off state and the maximum continuous state, and can also include lower power values such as 75% maximum continuous power and 50% maximum continuous power.

[0134] Step S503, determining the maximum slope coefficient based on the conversion performance parameters of the acceptance power state of each turboshaft engine, and determining the maximum allowable parameters of the adjacent acceptance power state according to the maximum slope coefficient based on the maximum allowable parameters of the maximum continuous power state. For details, please refer to step S403 of the embodiment shown in Figure 4 , which will not be described here again.

[0135] Step S504, determining the turboshaft engine performance acceptance index based on the maximum allowable parameters of the maximum continuous power state and the maximum allowable parameters of the adjacent acceptance power state; wherein the turboshaft engine performance acceptance index is used to evaluate the performance level of the turboshaft engine. For details, please refer to step S404 of the embodiment shown in Figure 4 , which will not be described here again.

[0136] The embodiment provides a kind of determination method of turboshaft engine performance acceptance index, the test data of multiple turboshaft engines is divided into multiple groups of conversion performance data, and pressure conversion coefficient, temperature conversion coefficient and humidity correction coefficient are determined again based on multiple groups of conversion performance data, the influence of atmospheric temperature, atmospheric pressure, atmospheric humidity and processing dispersity on performance data conversion and conversion performance variation slope is considered overall, so that turboshaft engine performance acceptance index is more accurate, and combined with ground bench test data, the influence of processing dispersity can be evaluated, and humidity correction coefficient can be improved more conveniently, ground bench test data is derived from the existing test task in development stage, there is no special requirement to test equipment, low in cost, data sample quantity is large, and the determination cost of performance acceptance index is reduced.

[0137] In the embodiment, a kind of determination method of turboshaft engine performance acceptance index is provided, which can be used in the server of above-mentioned class of equipment, Figure 6 It is a flow chart of a kind of determination method of turboshaft engine performance acceptance index according to the embodiment of the application, as Figure 6 As shown in the figure, the flow includes the following steps:

[0138] Step S601, the test data of multiple turboshaft engines are acquired, and temperature conversion coefficient, pressure conversion coefficient and humidity correction coefficient are determined based on the test data of multiple turboshaft engines respectively. For details, please refer to step S501 of the embodiment shown in Figure 5 Not repeated here.

[0139] Step S602, conversion performance parameters of the acceptance power state of each turboshaft engine are determined based on temperature conversion coefficient, pressure conversion coefficient and humidity correction coefficient. For details, please refer to step S502 of the embodiment shown in Figure 5 Not repeated here.

[0140] Step S603, maximum slope coefficient is determined based on the conversion performance parameters of the acceptance power state of each turboshaft engine, and the maximum allowable parameter of maximum continuous power state is taken as reference, and the maximum allowable parameter of adjacent acceptance power state is determined according to maximum slope coefficient.

[0141] Specifically, the above-mentioned step S603 includes:

[0142] Step S6031, the slope coefficient of conversion performance parameter with power variation between adjacent acceptance power states is determined based on the conversion performance parameters of the acceptance power state of each turboshaft engine, and the maximum slope coefficient in the slope coefficient of conversion performance parameter with power variation between adjacent acceptance power states is selected.

[0143] Specifically, as Figures 7-9For an engine, the calculation formula of the slope coefficient of the conversion performance parameter with power change between adjacent acceptance power states is shown as follows:

[0144]

[0145] In the above formula, d is the slope coefficient of the conversion performance parameter with power change between adjacent acceptance power states, and the conversion performance parameter includes conversion speed, gas turbine outlet conversion temperature, and conversion fuel consumption rate. h,st,1 , D h,st,2 is the conversion performance parameter of the adjacent acceptance power state, P h,st,1 , P h,st,2 is the acceptance power value of the adjacent acceptance power state.

[0146] Further, for the acceptance power states below the maximum continuous state, from the slope coefficients d of the conversion performance parameter with power change between adjacent acceptance power states corresponding to each engine, the maximum slope coefficient is selected as the slope coefficient between adjacent acceptance power states in the performance acceptance index curve.

[0147] In step S6032, the maximum allowable parameter of the first acceptance power state is determined according to the maximum slope coefficient, with the maximum allowable parameter of the maximum continuous power state as a reference; wherein the first acceptance power state is an adjacent power state of the maximum continuous power state, and the first acceptance power state is less than the maximum continuous power state.

[0148] Specifically, the first acceptance power state can be 75% of the maximum continuous power state, and the calculation formula of the maximum allowable parameter of the first acceptance power state is shown as follows:

[0149] D h,st,L = D h,st,H +d max ×(P h,st,L -P h,st,H ) (8)

[0150] In the above formula, D h,st,L is the maximum allowable parameter of the first acceptance power state, D h,st,H is the maximum allowable parameter of the maximum continuous power state, d max is the maximum slope coefficient, P h,st,L is the acceptance power value of the first acceptance power state, and P h,st,H is the acceptance power value of the maximum continuous power.

[0151] In step S6033, the maximum allowable parameter of the second acceptance power state is determined according to the maximum slope coefficient, with the maximum allowable parameter of the first acceptance power state as a reference; wherein the second acceptance power state is an adjacent power state of the first acceptance power state, and the second acceptance power state is less than the first acceptance power state.

[0152] Specifically, the second acceptance power state can be 50% of the maximum continuous power state, and the calculation formula of the maximum allowable parameter of the second acceptance power state is the same as formula (8) above, as shown in formula (9). Figures 7-9 As shown in formula (10), the performance level of the engine is constituted by the maximum allowable parameters corresponding to the take-off state, the maximum continuous power state, the first acceptance power state and the second acceptance power state, i.e. the turboshaft engine performance acceptance index.

[0153] Step S604, determining the turboshaft engine performance acceptance index based on the maximum allowable parameter of the maximum continuous power state and the maximum allowable parameter of the adjacent acceptance power state; wherein the turboshaft engine performance acceptance index is used to evaluate the performance level of the turboshaft engine. For details, please refer to step S504 of the embodiment shown in Figure 5 The step S504 of the embodiment shown in formula (10) will not be repeated here.

[0154] The determination method of the turboshaft engine performance acceptance index provided in this embodiment can effectively avoid the situation that the performance of the low conversion power state is qualified in hot weather conditions, but the actual high conversion power state performance does not meet the requirements, and can also avoid the situation that the performance acceptance index of the low conversion power state is too strict.

[0155] The following will illustrate a determination method of a turboshaft engine performance acceptance index through specific embodiments.

[0156] Embodiment 1:

[0157] As shown in formula (10), the specific steps of a determination method of a turboshaft engine performance acceptance index are as follows: Figure 10

[0158] ​Step 1, based on a large amount of test data of multiple engines, and fully considering the influence of machining dispersion, the calculation formula of the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient is determined respectively, and the specific steps are as follows: under the condition that the atmospheric pressure changes by no more than 0.5 kPa, the moisture content changes by no more than 1%, and at least two test data of the same engine are included, the performance data of different engines and each test are divided into several groups, and the temperature conversion coefficient is determined preferentially; after determining the calculation formula of the temperature conversion coefficient, under the condition that the moisture content changes by no more than 1%, and at least two test data of the same engine are included, the performance data of different engines and each test are divided into several groups, and the pressure conversion coefficient is determined; after determining the calculation formula of the temperature conversion coefficient and the pressure conversion coefficient, the humidity correction coefficient is determined; wherein, the cumulative error of the conversion performance parameters of each test of each engine in several groups relative to the average value is calculated, and the slope coefficient corresponding to the minimum cumulative error is taken as the slope coefficient in the calculation formula of the temperature conversion coefficient or the pressure conversion coefficient or the humidity correction coefficient;

[0159] Step 2, in the bench performance acceptance curve, the maximum slope of the conversion speed, the conversion temperature of the gas turbine outlet and the conversion specific fuel consumption with the conversion power between adjacent acceptance points is taken as the slope of the corresponding interval of the performance acceptance index curve, and the maximum allowable parameter requirement of the lower acceptance power state (for example, 75% of the maximum continuous power state or 50% of the maximum continuous power state) is determined based on the declared value of the highest acceptance point.

[0160] Step 3, directly using the performance conversion data formed in the formula optimization process, the maximum slope of the parameter change of adjacent acceptance points is obtained, and the maximum allowable parameter requirement of the lower acceptance power state is determined based on the maximum allowable parameter requirement of the take-off state and the maximum continuous state, and then the determination of the performance acceptance index of the turboshaft engine is completed.

[0161] Example 2:

[0162] The verification of a certain turboshaft engine shows that the determination method of the performance acceptance index of the turboshaft engine can better meet the acceptance work of the engine, and the specific steps are as follows:

[0163] The related turboshaft engine performance data are shown in Figures 11-13 , and the specific steps are shown in Figures 14-16 In this embodiment, the temperature conversion coefficient changes with the atmospheric condition, and the conversion fuel flow and the conversion temperature of the gas turbine outlet under different atmospheric temperatures are closer; and compared with the humidity correction coefficient corresponding to the related turboshaft engine performance data, the humidity correction coefficient in this embodiment is determined based on the test data, and the conversion power of the same engine under different humidity conditions is closer.

[0164] As shown in Figures 17-19As shown, for a qualified engine, the curves of the converted speed, the converted turbine outlet temperature and the converted specific fuel consumption with the converted power should be lower than the corresponding curves of the performance acceptance index. In the performance acceptance index obtained by the model simulation, the slopes of the converted speed and the converted turbine outlet temperature increasing with the power are smaller than the actual slopes of the part engine parameters, and in particular, the slope of the converted specific fuel consumption decreasing with the power is obviously larger than the actual slope of the part engine parameters. If the actual performance of the engine is close to the performance acceptance index, it is very likely that the qualified engine in the low converted power state and the unqualified engine in the high converted power state, resulting in the unqualified engine being delivered due to the low converted power in hot weather. The bench acceptance index determined in the embodiment can better adapt to the influence of the machining dispersion on the engine performance.

[0165] The above embodiment fully considers the influences of the atmospheric temperature, the atmospheric pressure, the atmospheric humidity and the machining dispersion, and the obtained performance data conversion formula and the performance acceptance index are more accurate. The above embodiment is verified by a certain turboshaft engine, and it is shown that the determination method of the turboshaft engine performance acceptance index can better meet the acceptance work of the engine.

[0166] In the embodiment, a determination device of a turboshaft engine performance acceptance index is also provided, which is used to implement the above embodiment and the preferred embodiment, and will not be described herein. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiment is preferably implemented in software, the implementation of hardware or the combination of software and hardware is also possible and conceived.

[0167] The embodiment provides a determination device of a turboshaft engine performance acceptance index, as shown in the accompanying drawings, comprising: Figure 20

[0168] The first determination module 2001 is configured to obtain test data of a plurality of turboshaft engines, and determine a temperature conversion coefficient, a pressure conversion coefficient and a humidity correction coefficient based on the test data of the plurality of turboshaft engines.

[0169] The second determination module 2002 is configured to determine converted performance parameters of an acceptance power state of each turboshaft engine based on the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient.

[0170] The third determination module 2003 is configured to determine a maximum slope coefficient based on the converted performance parameters of the acceptance power state of each turboshaft engine, and determine a maximum allowable parameter of an adjacent acceptance power state according to the maximum slope coefficient based on the maximum allowable parameter of the maximum continuous power state.

[0171] ​The fourth determining module 2004 is configured to determine a turboshaft engine performance acceptance index based on the maximum allowable parameter of the maximum continuous power state and the maximum allowable parameter of the adjacent acceptance power state, where the turboshaft engine performance acceptance index is used to evaluate the performance level of the turboshaft engine.

[0172] In some optional embodiments, the first determining module 2001 comprises:

[0173] The first dividing unit is configured to divide the test data of the plurality of turboshaft engines into a plurality of groups of converted performance data based on the preset pressure variation threshold, the preset humidity content variation threshold and the at least two test data of the same turboshaft engine, and determine the temperature conversion coefficient based on the plurality of groups of converted performance data, where each group of converted performance data is the converted performance data of the same turboshaft engine under the same converted speed state and different atmospheric temperatures.

[0174] The second dividing unit is configured to divide the test data of the plurality of turboshaft engines into a plurality of groups of converted performance data based on the preset humidity content variation threshold and the at least two test data of the same turboshaft engine, and determine the pressure conversion coefficient based on the plurality of groups of converted performance data, where each group of converted performance data is the converted performance data of the same turboshaft engine under the same converted speed state and different atmospheric pressures.

[0175] The third dividing unit is configured to divide the test data of the plurality of turboshaft engines into a plurality of groups of converted performance data based on the at least two test data of the same turboshaft engine, and determine the humidity correction coefficient based on the plurality of groups of converted performance data, where each group of converted performance data is the converted performance data of the same turboshaft engine under the same converted speed state and different atmospheric humidity contents.

[0176] In some optional embodiments, the first dividing unit comprises:

[0177] The iteration subunit is configured to obtain an initial slope coefficient, iterate the initial slope coefficient according to a preset iteration step, and calculate the cumulative error corresponding to each group of converted performance data during the iteration of the initial slope coefficient.

[0178] The sorting subunit is configured to sort the cumulative errors corresponding to the plurality of groups of converted performance data, and determine the minimum cumulative error.

[0179] The first calculation subunit is configured to obtain the atmospheric temperature and the initial conversion coefficient, and calculate the temperature conversion coefficient based on the slope coefficient corresponding to the minimum cumulative error, the atmospheric temperature and the initial conversion coefficient.

[0180] In some optional embodiments, the second determining module 2002 comprises:

[0181] The first determining unit is configured to determine the conversion performance parameter of each turbo-shaft engine in the conversion speed state based on the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient.

[0182] The second determining unit is configured to determine the conversion performance parameter of each turbo-shaft engine in the acceptance power state by linear interpolation based on the conversion performance parameter of each turbo-shaft engine in the conversion speed state.

[0183] In some optional embodiments, the second determining unit comprises:

[0184] The determining sub-unit is configured to obtain the acceptance power value, and determine the adjacent power value of the acceptance power value and the conversion performance parameter corresponding to the adjacent power value based on the conversion performance parameter of each turbo-shaft engine in the conversion speed state.

[0185] The second calculating sub-unit is configured to calculate the conversion performance parameter of each turbo-shaft engine in the acceptance power state based on the acceptance power value, the adjacent power value and the conversion performance parameter corresponding to the adjacent power value.

[0186] In some optional embodiments, the third determining module 2003 comprises:

[0187] The third determining unit is configured to determine the slope coefficient of the conversion performance parameter varying with the power between adjacent acceptance power states based on the conversion performance parameter of each turbo-shaft engine in the acceptance power state, and select the maximum slope coefficient from the slope coefficients.

[0188] The fourth determining unit is configured to determine the maximum allowable parameter of the first acceptance power state according to the maximum slope coefficient with the maximum allowable parameter of the maximum continuous power state as a reference, wherein the first acceptance power state is adjacent to the maximum continuous power state and smaller than the maximum continuous power state.

[0189] The fifth determining unit is configured to determine the maximum allowable parameter of the second acceptance power state according to the maximum slope coefficient with the maximum allowable parameter of the first acceptance power state as a reference, wherein the second acceptance power state is adjacent to the first acceptance power state and smaller than the first acceptance power state.

[0190] In some optional embodiments, the maximum allowable parameter in the third determining module 2003 comprises the maximum allowable conversion speed, the maximum allowable gas turbine outlet conversion temperature and the maximum allowable conversion specific fuel consumption.

[0191] The further function descriptions of the above modules and units are the same as those of the above corresponding embodiments, and will not be repeated here.

[0192] In this embodiment, the device for determining the performance acceptance criteria of a turboshaft engine is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0193] This invention also provides a computer device having the above-described features. Figure 20 The device shown is for determining the performance acceptance criteria of a turboshaft engine.

[0194] Please see Figure 21 , Figure 21 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 21 As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 21 Take a processor 10 as an example.

[0195] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0196] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0197] The memory 20 can include a program storage area and a data storage area, where the program storage area can store an operating system, application programs required by at least one function, and the data storage area can store data created according to the use of the computer device, etc. In addition, the memory 20 can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some optional embodiments, the memory 20 can optionally include a memory disposed remotely with respect to the processor 10, which can be connected to the computer device through a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0198] The memory 20 can include a volatile memory, such as a random access memory; the memory can also include a non-volatile memory, such as a flash memory, a hard disk, or a solid-state disk; and the memory 20 can also include a combination of the above-mentioned kinds of memories.

[0199] The computer device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30, and the output device 40 can be connected through a bus or other means, Figure 21 For example, by way of example, through a bus connection.

[0200] The input device 30 can receive inputted digital or character information, and generate key signal inputs related to the user settings and function controls of the computer device, such as a touch screen, a keypad, a mouse, a trackpad, a touchpad, a pointing stick, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 can include a display device, an auxiliary lighting device (e.g., an LED), a tactile feedback device (e.g., a vibration motor), etc. The above-mentioned display device includes, but is not limited to, a liquid crystal display, a light-emitting diode, a display, and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0201] The embodiments of the present application further provide a computer readable storage medium, and the method according to the embodiments of the present application can be implemented in hardware, firmware, or recorded in a storage medium, or be implemented as computer codes stored in a remote storage medium or a non-transitory machine readable storage medium and downloaded through a network and stored in a local storage medium, so that the method described herein can be processed by such software on a storage medium using a general purpose computer, a special purpose processor, or programmable or special hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid state disk, etc. Further, the storage medium can also include a combination of the above-mentioned types of memories. It can be understood that the computer, the processor, the microprocessor controller, or the programmable hardware includes a storage component that can store or receive software or computer codes, when the software or computer codes are accessed and executed by the computer, the processor, or the hardware, the method shown in the above embodiments is implemented.

[0202] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A method for determining performance acceptance indicators of a turboshaft engine, characterized in that, The method comprises: obtaining test data of multiple turboshaft engines, determining temperature conversion coefficients, pressure conversion coefficients and humidity correction coefficients based on the test data of the multiple turboshaft engines respectively; determining conversion performance parameters of each turboshaft engine in an acceptance power state based on the temperature conversion coefficients, the pressure conversion coefficients and the humidity correction coefficients; determining a maximum slope coefficient based on the conversion performance parameters of each turboshaft engine in the acceptance power state, and determining maximum allowable parameters of adjacent acceptance power states according to the maximum slope coefficient, taking the maximum allowable parameters of the maximum continuous power state as a reference; determining a turboshaft engine performance acceptance index based on the maximum allowable parameters of the maximum continuous power state and the maximum allowable parameters of the adjacent acceptance power states; wherein the turboshaft engine performance acceptance index is used to evaluate the performance level of the turboshaft engine; the determination of the conversion performance parameters of each turboshaft engine in the acceptance power state based on the temperature conversion coefficients, the pressure conversion coefficients and the humidity correction coefficients comprises: determining conversion performance parameters of each turboshaft engine in a conversion speed state based on the temperature conversion coefficients, the pressure conversion coefficients and the humidity correction coefficients; determining the conversion performance parameters of each turboshaft engine in the acceptance power state by linear interpolation based on the conversion performance parameters of each turboshaft engine in the conversion speed state; the determination of the conversion performance parameters of each turboshaft engine in the acceptance power state by linear interpolation based on the conversion performance parameters of each turboshaft engine in the conversion speed state comprises: obtaining an acceptance power value, determining adjacent power values of the acceptance power value and conversion performance parameters corresponding to the adjacent power values based on the conversion performance parameters of each turboshaft engine in the conversion speed state; calculating the conversion performance parameters of each turboshaft engine in the acceptance power state based on the acceptance power value, the adjacent power values and the conversion performance parameters corresponding to the adjacent power values.

2. The method of claim 1, wherein, the determination of the temperature conversion coefficients, the pressure conversion coefficients and the humidity correction coefficients based on the test data of the multiple turboshaft engines respectively comprises: dividing the test data of the multiple turboshaft engines into multiple groups of conversion performance data based on a preset pressure change threshold, a preset humidity content change threshold and at least two test data of the same turboshaft engine, and determining the temperature conversion coefficients based on the multiple groups of conversion performance data; wherein each group of conversion performance data is conversion performance data of the same turboshaft engine under the same conversion speed state and different atmospheric temperatures; dividing the test data of the multiple turboshaft engines into multiple groups of conversion performance data based on the preset humidity content change threshold and the at least two test data of the same turboshaft engine, and determining the pressure conversion coefficients based on the multiple groups of conversion performance data; wherein each group of conversion performance data is conversion performance data of the same turboshaft engine under the same conversion speed state and different atmospheric pressures; The test data of the plurality of turboshaft engines is divided into a plurality of groups of converted performance data based on at least two test data of the same turboshaft engine, and the humidity correction coefficient is determined based on the plurality of groups of converted performance data; wherein each group of converted performance data is converted performance data of the same turboshaft engine under the same converted speed state and different atmospheric humidity.

3. The method of claim 2, wherein, The temperature conversion coefficient is determined based on the plurality of groups of converted performance data, including: An initial slope coefficient is obtained, the initial slope coefficient is iterated according to a preset iteration step, and the cumulative error corresponding to each group of converted performance data is calculated during the iteration of the initial slope coefficient; The cumulative errors corresponding to the plurality of groups of converted performance data are sorted to determine a minimum cumulative error; An atmospheric temperature and an initial conversion coefficient are obtained, and the temperature conversion coefficient is calculated based on the slope coefficient corresponding to the minimum cumulative error, the atmospheric temperature and the initial conversion coefficient.

4. The method of claim 1, wherein, The maximum slope coefficient is determined based on the converted performance parameters of the acceptance power states of the plurality of turboshaft engines, and the maximum allowable parameter of an adjacent acceptance power state is determined according to the maximum slope coefficient based on the maximum allowable parameter of the maximum continuous power state, including: The maximum slope coefficient is determined based on the converted performance parameters of the acceptance power states of the plurality of turboshaft engines, and the maximum slope coefficient is selected among the slope coefficients of the converted performance parameters changing with power between adjacent acceptance power states; The maximum allowable parameter of a first acceptance power state is determined according to the maximum slope coefficient based on the maximum allowable parameter of the maximum continuous power state; wherein the first acceptance power state is an adjacent power state of the maximum continuous power state, and the first acceptance power state is less than the maximum continuous power state; The maximum allowable parameter of a second acceptance power state is determined according to the maximum slope coefficient based on the maximum allowable parameter of the first acceptance power state; wherein the second acceptance power state is an adjacent power state of the first acceptance power state, and the second acceptance power state is less than the first acceptance power state.

5. The method of claim 1, wherein, The maximum allowable parameter includes a maximum allowable converted speed, a maximum allowable gas turbine outlet converted temperature and a maximum allowable converted specific fuel consumption.

6. A device for determining acceptance criteria for a turboshaft engine performance, characterized in that, The device includes: A first determination module is configured to obtain test data of a plurality of turboshaft engines, and determine a temperature conversion coefficient, a pressure conversion coefficient and a humidity correction coefficient based on the test data of the plurality of turboshaft engines respectively; A second determination module is configured to determine converted performance parameters of acceptance power states of each turboshaft engine based on the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient; A third determination module is configured to determine a maximum slope coefficient based on the converted performance parameters of the acceptance power states of each turboshaft engine, and determine a maximum allowable parameter of an adjacent acceptance power state according to the maximum slope coefficient based on a maximum allowable parameter of a maximum continuous power state. The fourth determining module is configured to determine a turboshaft engine performance acceptance index based on the maximum allowable parameter of the maximum continuous power state and the maximum allowable parameter of the adjacent acceptance power state, wherein the turboshaft engine performance acceptance index is used to evaluate the performance level of the turboshaft engine. The second determining module comprises: The first determining unit is configured to determine the converted performance parameter of each turboshaft engine in the converted speed state based on the temperature conversion coefficient, the pressure conversion coefficient and the humidity correction coefficient. The second determining unit is configured to determine the converted performance parameter of each turboshaft engine in the acceptance power state by linear interpolation based on the converted performance parameter of each turboshaft engine in the converted speed state. The second determining unit comprises: The determining sub-unit is configured to obtain the acceptance power value, determine the adjacent power value of the acceptance power value and the converted performance parameter corresponding to the adjacent power value based on the converted performance parameter of each turboshaft engine in the converted speed state. The second calculating sub-unit is configured to calculate the converted performance parameter of each turboshaft engine in the acceptance power state based on the acceptance power value, the adjacent power value and the converted performance parameter corresponding to the adjacent power value.

7. A computer device, comprising: The memory and the processor are in communication connection with each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the method for determining the turboshaft engine performance acceptance index according to any one of claims 1 to 5. The computer readable storage medium stores computer instructions, and the computer instructions are used to make the computer perform the method for determining the turboshaft engine performance acceptance index according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, ​

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