Dynamic sensor setting method

Abstract

The invention relates to the technical field of engine tests, and discloses a dynamic sensor setting method. The dynamic sensor setting method comprises the steps of determining a target measurement position of a test piece; according to the target measurement position, a corresponding actual measurement position is determined, the actual measurement position is provided with an assembly space suitable for in-situ assembly of the dynamic sensor, the actual measurement position is provided with a through hole communicated with the interior of the test piece, and the root-mean-square error of pressure measured by the target measurement position and the corresponding actual measurement position does not exceed a deviation value; a dynamic sensor is arranged in the through hole. According to the invention, the process of dynamic pressure measurement test can be simplified and supplemented, and the implementation speed of the dynamic pressure measurement test can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engine tests, and particularly to a method for setting dynamic sensors. Background Art

[0002] Due to the high cost and fragility of dynamic sensors, and the large space required for storing dynamic data, dynamic pressure measurement is generally not arranged during the preliminary tests of conventional components or the whole machine of an aeroengine, and only static pressure measurement is carried out.

[0003] However, the need for dynamic pressure measurement may occur temporarily during the test. For example, when there are abnormal noises during the starting process, obvious pressure pulsations during the thrust speed increase, vibration exceeding the limit, etc. during the test, and the static pressure measurement data is not sufficient to analyze the reasons, dynamic pressure measurement is required to help investigate the reasons for abnormal noises and vibration exceeding the limit. Another example is that when the test progresses quickly and there is still spare time on the test bench, dynamic pressure measurement tests can also be supplemented for further analysis of the stall mechanism of the aeroengine.

[0004] In related technologies, generally, the test piece is taken off the test bench, disassembled, re-machined to produce dynamic pressure measurement holes, reassembled and put back on the test bench for testing, and then data analysis is carried out. However, the process of taking off, disassembling, and reassembling and putting back on the test bench is relatively complex and slow, which will waste the available time of the test bench. Moreover, the test conditions of aeroengines are required to be strict, and assembly resources (assembly tools and operators) are also relatively scarce. The related processes need to occupy the test bench resources and assembly resources, affecting the progress of other tests. Summary of the Invention

[0005] In view of this, the present invention provides a method for setting dynamic sensors to solve the problems of complex process and slow speed in supplementing dynamic pressure measurement tests.

[0006] The present invention provides a method for setting dynamic sensors, including: determining the target measurement position of the test piece; according to the target measurement position, determining the corresponding actual measurement position, the actual measurement position having an assembly space suitable for on-site assembly of the dynamic sensor, the actual measurement position having a through hole communicating with the inside of the test piece, and the root mean square error of the pressures measured at the target measurement position and the corresponding actual measurement position not exceeding the deviation value; and setting a dynamic sensor in the through hole.

[0007] Beneficial effects: When dynamic pressure measurement needs to be supplemented, by finding and determining a suitable actual measurement position around the target measurement position and using the existing through holes on the test piece to set up dynamic sensors, the step of machining additional dynamic pressure measurement holes is saved. The area around the through holes is suitable for on-site assembly of dynamic sensors. Therefore, the test piece does not need to be removed from the test bench, thus saving assembly resources and test bench resources. The method for setting dynamic sensors helps to simplify the process of supplementing dynamic pressure measurement tests and improve the implementation speed of dynamic pressure measurement tests.

[0008] In an alternative embodiment, the target measurement position includes a first target measurement position. Determining the target measurement position of the test piece includes: obtaining the steady-state test data of the test piece; and determining the first target measurement position according to the steady-state test data.

[0009] Beneficial effects: When determining the target measurement position, the steady-state test data obtained from the prior steady-state test can be used as a reference, so as to accurately identify the high-risk points with abnormalities in the test piece, and use the high-risk points as the target measurement positions for dynamic pressure measurement tests, in order to analyze the reasons for the abnormalities and improve the value of the result data of the dynamic pressure measurement tests.

[0010] In an alternative embodiment, the steady-state test data includes static pressure measurement data, vibration data, and noise data.

[0011] Beneficial effects: Based on the static pressure measurement data, it is possible to judge whether there are abnormal pressure fluctuations at the static pressure measurement positions. Based on the vibration data, it is possible to judge whether there are parts with excessive vibration amplitudes in the test piece. Based on the noise data, it is possible to judge whether there are abnormal noises during the operation of the test piece, so as to accurately identify the high-risk points with abnormalities in the test piece.

[0012] In an alternative embodiment, determining the first target measurement position according to the steady-state test data includes at least one of the following: according to the static pressure measurement data, taking the position where the pressure fluctuation exceeds the first threshold as the first target measurement position; according to the vibration data, taking the position where the amplitude of the test piece exceeds the second threshold as the first target measurement position; according to the noise data, taking the position where the noise of the test piece exceeds the third threshold as the first target measurement position.

[0013] Beneficial effects: Using the pre-determined first threshold, second threshold, and third threshold as the basis for judging high-risk points can eliminate the subjective factors of test operators, and more efficiently and reasonably screen out the high-risk points with dynamic pressure measurement requirements. On the one hand, it saves the resources of dynamic sensors, and on the other hand, it also improves the operation efficiency.

[0014] In an alternative embodiment, the target measurement positions include second target measurement positions. Determining the target measurement positions of the test piece further includes: obtaining dynamic simulation data of the test piece; and determining the second target measurement positions according to the dynamic simulation data.

[0015] Advantageous effects: The sampling points of the steady-state test are limited and it is difficult to reflect the flow field information of the test piece. Therefore, the high-risk points determined based on the static pressure measurement data are not comprehensive enough. By introducing dynamic simulation data, it helps to comprehensively identify the high-risk points with abnormal pressure in the test piece. At the same time, it is difficult for the simulation of pressure to reflect the vibration and noise information of the test piece, and the vibration data and noise data can be used as supplements to the dynamic simulation data. Combining the first target measurement positions and the second target measurement positions can more effectively carry out the dynamic pressure measurement test.

[0016] In an alternative embodiment, determining the second target measurement positions of the test piece according to the dynamic simulation data includes: comparing the static pressure measurement data and the dynamic simulation data, and judging whether the dynamic simulation data is credible according to the comparison result; if the judgment result is credible, determining the second target measurement positions of the test piece according to the dynamic simulation data.

[0017] Advantageous effects: The parameter settings of the simulation have a great influence on the simulation results. Even if the simulation converges, it does not mean that the simulation obtains accurate and reliable results. By using the static pressure measurement data to verify the simulation results, the accuracy of the dynamic simulation data can be ensured.

[0018] In an alternative embodiment, determining the second target measurement positions of the test piece according to the dynamic simulation data includes at least one of the following: taking the positions where the pressure fluctuation coefficient cp exceeds the fourth threshold as the second target measurement positions, where cp = (P max -P min ) / P ave , P max is the maximum pressure, P min is the minimum pressure, P ave is the average pressure; taking the positions where there are eddies, recirculation or secondary flows in the flow field as the second target measurement positions; taking the positions where there are low-frequency high-amplitude signals other than the rotor fundamental frequency in the frequency domain as the second target measurement positions.

[0019] Advantageous effects: Using the pre-determined fourth threshold as the basis for judging high-risk points can exclude the subjective factors of test operators and more efficiently and reasonably screen out the high-risk points with dynamic pressure measurement requirements. Judging high-risk points based on the flow field and frequency domain information can give full play to the advantages of numerical simulation and comprehensively utilize the information contained in the dynamic simulation data.

[0020] In an alternative embodiment, disposing a dynamic sensor in the through hole includes:

[0021] Disposing a conversion structure on the through hole; disposing the dynamic sensor on the conversion structure; wherein, the conversion structure includes a measurement channel communicating with the through hole, one end of the measurement channel is provided with an internal thread for cooperating with the dynamic sensor, and the end of the conversion structure away from the internal thread is provided with an external thread or a bolt for cooperating with the through hole.

[0022] Advantageous effects: Since the through hole is not specially machined for installing the dynamic sensor, there is a situation where the specifications of the through hole and the dynamic sensor do not match. By adding a conversion structure to the through hole, the through hole can meet the installation requirements of the dynamic sensor and realize the installation of the dynamic sensor.

[0023] In an alternative embodiment, the dynamic sensor is flush-mounted in the conversion structure.

[0024] Advantageous effects: Flush mounting means that the working surface of the dynamic sensor is flush with the flow field surface of the test piece. Adopting flush mounting is suitable for reducing the disturbance of the dynamic sensor to the flow field and improving the accuracy of dynamic pressure measurement.

[0025] In an alternative embodiment, the through hole includes at least one of a static pressure measurement hole, a total parameter measurement hole, and an ignition nozzle hole.

[0026] Advantageous effects: The static pressure measurement hole, the total parameter measurement hole, and the ignition nozzle hole are common through holes communicating with the inside of the test piece. Prioritizing to find a through hole that meets the requirements among these holes can improve the implementation efficiency of the method for setting the dynamic sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic flow chart of a method for setting a dynamic sensor according to an embodiment of the present invention;

[0029] Figure 2 It is a schematic flow chart of another method for setting a dynamic sensor according to an embodiment of the present invention;

[0030] Figure 3Schematic flowchart of another dynamic sensor setting method according to an embodiment of the present invention. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an" as used herein may also include the plural forms. The terms "comprises", "comprising" and "having" are inclusive and thus specify the presence of the stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.

[0033] Although the terms first, second, etc. may be used herein to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used herein. In addition, in the description of the present application, unless otherwise clearly defined and limited, the terms "set", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0034] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "end", "length", "inner", "outer", etc. Such spatial relative relationship terms are intended to include different orientations of the mechanism during use or operation in addition to the orientations depicted in the figure. For example, if the mechanism in the figure is flipped, an element described as "below other elements or features" or "beneath other elements or features" will then be oriented as "above other elements or features" or "over other elements or features". Thus, the example term "below" can include both upper and lower orientations. The mechanism can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0035] During the test of the test piece of an aeroengine, there may be a temporary need for dynamic pressure measurement. However, the cost of dynamic pressure measurement is relatively high, and there is a lack of sufficient data support during the preliminary tests. Therefore, dynamic pressure measurement is generally not arranged, and no dynamic pressure measurement holes will be pre-machined on the test piece.

[0036] The experimental environment and conditions of an aeroengine are required to be strict, and the machining process and assembly process are also relatively complex. If the test piece is taken off the platform for disassembly, the dynamic pressure measurement holes are re-machined, and then reassembled onto the platform for testing, it will seriously occupy the platform resources and assembly resources, affect the progress of other tests, and is not conducive to the flexible implementation of dynamic pressure measurement.

[0037] The following Figures 1 to 3 describes the embodiments of the present invention.

[0038] Referring Figure 1 to, according to the embodiments of the present invention, in a first aspect, a method for setting a dynamic sensor is provided, including the following steps:

[0039] Step S101: Determine the target measurement position of the test piece.

[0040] It can be understood that the target measurement position refers to the position where there are abnormally high-risk points during the test. Generally, there are multiple target measurement positions, and the target measurement positions can be determined through experience or past test data. For example, positions such as at each stage of the rotor in the combined compressor, between the axial flow and centrifugal, and at the outlet of the centrifugal impeller. By performing dynamic pressure measurement on the target measurement positions, it can help identify the reasons for abnormalities in the test piece. However, the target measurement positions are uncertain and lack dynamic pressure measurement holes, so they may not be suitable for dynamic pressure measurement.

[0041] Step S102: Determine the corresponding actual measurement position according to the target measurement position.

[0042] Among them, the actual measurement position has an assembly space suitable for on-site assembly of a dynamic sensor, the actual measurement position has a through-hole communicating with the inside of the test piece, and the root mean square error of the pressures measured at the target measurement position and the corresponding actual measurement position does not exceed the deviation value.

[0043] Based on the target measurement position, the actual measurement position is determined. The actual measurement position meets certain conditional requirements to facilitate actual dynamic pressure measurement. On the one hand, the actual measurement position has a through-hole that communicates with the inside of the test piece, thus facilitating the installation of the dynamic sensor; on the other hand, there is an assembly space around the actual measurement position, thus facilitating the operator to carry out assembly operations, and the cables or structures around the measurement position will not interfere with the installation of the dynamic sensor.

[0044] Exemplarily, the deviation value can be set to any value between 2% and 5% of the range.

[0045] Step S103: Set a dynamic sensor in the through-hole.

[0046] According to the dynamic sensor setting method of the present invention, when it is necessary to supplement dynamic pressure measurement, by finding and determining a suitable actual measurement position around the target measurement position, and using the existing through-holes on the test piece that were originally for other purposes to set the dynamic sensor, thus eliminating the step of supplementary machining of dynamic pressure measurement holes. The area around the through-hole is suitable for on-site assembly of the dynamic sensor. Therefore, the test piece does not need to be removed from the vehicle platform, thereby saving assembly resources and vehicle platform resources. The dynamic sensor setting method helps to simplify the process of supplementary dynamic pressure measurement tests and improve the implementation speed of dynamic pressure measurement tests.

[0047] Moreover, the dynamic sensor setting method is suitable for quickly and nimbly carrying out dynamic pressure measurement tests, thus helping to quickly identify the reasons for abnormalities in the test piece, improve the iteration speed of the test, and contribute to the rapid development of aeroengines.

[0048] Refer to Figure 2 , according to an embodiment of the present invention, another dynamic sensor setting method is provided, including the following steps:

[0049] Step S201: Determine the target measurement position of the test piece.

[0050] Among them, step S201 further includes:

[0051] Step S2011: Obtain the steady-state test data of the test piece.

[0052] Step S2012: According to the steady-state test data, determine the target measurement position (here, the target measurement position obtained according to the steady-state test data is defined as the first target measurement position).

[0053] It is understandable that due to differences in structural design, the positions of high-risk points in different test pieces may have significant deviations. Determining the target measurement positions solely based on past experience may lead to misjudgments, resulting in data redundancy or inaccurate and incomplete dynamic pressure measurement data, affecting subsequent analysis of the test pieces.

[0054] The dynamic pressure measurement is selectively supplemented after the steady-state test. By introducing the steady-state test data generated in the prior steady-state test, it helps to better identify the accurate positions of the high-risk points of the current test piece, and use the high-risk points as the target measurement positions for the dynamic pressure measurement test to obtain better test data for analyzing the causes of abnormalities and improving the value of the result data of the dynamic pressure measurement test.

[0055] Optionally, in some embodiments, the steady-state test data includes at least one of static pressure measurement data, vibration data, and noise data. Among them, the static pressure measurement data is collected by static pressure sensors set at sampling points (such as inlets, outlets, and inter-stage positions) during the steady-state test, and the vibration data and noise data are collected by additionally set sensors.

[0056] Based on the static pressure measurement data, it is possible to determine whether there are abnormal pressure fluctuations at the static pressure measurement positions. Based on the vibration data, it is possible to determine whether there are parts with excessive vibration amplitudes in the test piece. Based on the noise data, it is possible to determine whether there are abnormal noises during the operation of the test piece. The static pressure measurement data, vibration data, and noise data have different characteristics, which helps to accurately and comprehensively identify the high-risk points with abnormalities in the test piece.

[0057] The steady-state test data includes at least one of the three types of data. In some embodiments, at least two types of data are used to identify the high-risk points, and the identified high-risk points are summarized together as the final first target measurement positions, which helps to increase the number of the first target measurement positions, enable the dynamic pressure measurement test to more comprehensively cover each abnormal position that needs further analysis, and improve the value of the result data of the dynamic pressure measurement test.

[0058] Exemplarily, in some embodiments, the required first target measurement positions can be obtained from the steady-state test data through at least one of the following methods:

[0059] According to the static pressure measurement data, the positions where the pressure fluctuation exceeds the first threshold are used as the first target measurement positions.

[0060] According to the vibration data, the positions in the test piece where the amplitude exceeds the second threshold are used as the first target measurement positions.

[0061] Based on the noise data, the positions in the test piece where the noise exceeds the third threshold are taken as the first target measurement positions.

[0062] Using the pre-determined first threshold, second threshold, and third threshold as the basis for judging high-risk points can exclude the subjective factors of the test operators and more efficiently and reasonably screen out the high-risk points with dynamic pressure measurement requirements. On the one hand, it saves the resources of dynamic sensors, and on the other hand, it also improves the operation efficiency.

[0063] Exemplarily, the first threshold can be set to ±5% of the sensor range, the second threshold can be set to 38 mm / s, and the third threshold can be set to 80 db.

[0064] It should be noted that the first target measurement position is a subset of the target measurement positions. In addition to the first target measurement positions, the target measurement positions may also include other target measurement positions determined by other means, such as through unsteady simulation calculation and analysis.

[0065] Optionally, the target measurement positions may further include second target measurement positions. Correspondingly, in some embodiments, step S201 further includes:

[0066] Step S2013: Obtain the dynamic simulation data of the test piece.

[0067] Step S2014: Determine the second target measurement positions according to the dynamic simulation data.

[0068] It can be understood that the sampling points of the steady-state test are limited and it is difficult to reflect the flow field information of the test piece. Therefore, there is a problem that the high-risk points determined based on the static pressure measurement data are not comprehensive enough. By introducing dynamic simulation data, it helps to comprehensively identify the high-risk points with abnormal pressure in the test piece. At the same time, it is difficult for the simulation of pressure to reflect the vibration and noise information of the test piece, and the vibration data and noise data can be used as a supplement to the dynamic simulation data; combining the first target measurement positions and the second target measurement positions can more effectively carry out the dynamic pressure measurement test.

[0069] In some embodiments, step S2014 further includes:

[0070] Compare the static pressure measurement data and the dynamic simulation data, and judge whether the dynamic simulation data is credible according to the comparison result; if the judgment result is credible, determine the second target measurement positions of the test piece according to the dynamic simulation data.

[0071] The parameter settings of the simulation have a great influence on the simulation results. Even if the simulation converges, it does not mean that the simulation obtains accurate and reliable results. By using the static pressure measurement data to verify the simulation results, the accuracy of the dynamic simulation data can be ensured.

[0072] Specifically, the simulation results of the sampling points of the steady-state test can be read from the dynamic simulation data, and it is compared whether the simulation results are consistent with the static pressure measurement data. If the deviation between the two is within the allowable range, the comparison result is credible.

[0073] On the contrary, if the deviation between the two exceeds the allowable range, the comparison result is not credible, and it is necessary to modify the simulation parameters, perform dynamic simulation again, and then make a judgment based on the new dynamic simulation data.

[0074] Moreover, in addition to the pressure information, information such as the flow field and frequency can also be extracted from the dynamic simulation data, and potential high-risk points in the test piece can be analyzed and identified from multiple perspectives. Exemplarily, in some embodiments, for credible dynamic simulation data, the following one or more methods can be used to obtain the required second target measurement positions:

[0075] Taking the position where the pressure fluctuation coefficient cp exceeds the fourth threshold as the second target measurement position, where cp = (P max -P min ) / P ave . P max is the maximum pressure, P min is the minimum pressure, and P ave is the average pressure.

[0076] Taking the positions where there are vortices, recirculation or secondary flows in the flow field as the second target measurement positions. The positions where there are vortices, recirculation or secondary flows are also the positions where the flow field separation is severe in the simulation, which means that the flow field situation at this position is complex and it is necessary to further analyze with actual dynamic pressure measurement.

[0077] Taking the positions where there are low-frequency high-amplitude signals other than the rotor fundamental frequency in the frequency domain as the second target measurement positions. Under normal operating conditions, the rotor fundamental frequency should be dominant in the frequency domain. If a signal deviating from the rotor fundamental frequency appears and its amplitude is large, excluding the reason of background noise, it is necessary to further analyze the reason for the signal generation in order to eliminate abnormal signals through optimized design.

[0078] Using the pre-determined fourth threshold as the basis for judging high-risk points can exclude the subjective factors of test operators and more efficiently and reasonably screen out high-risk points with dynamic pressure measurement requirements; judging high-risk points based on flow field and frequency domain information can give full play to the advantages of numerical simulation and comprehensively utilize the information contained in the dynamic simulation data.

[0079] In some embodiments, at least two methods are used to identify high-risk points, and the identified high-risk points are aggregated together as the final second target measurement position, which helps to increase the number of second target measurement positions, enables the dynamic pressure measurement test to more comprehensively cover each abnormal position that needs further analysis, and improves the value of the result data of the dynamic pressure measurement test.

[0080] Exemplarily, the fourth threshold can be set to 0.2.

[0081] Step S202: Determine the corresponding actual measurement position according to the target measurement position.

[0082] Step S203: Set a dynamic sensor in the through hole.

[0083] For the content not mentioned in step S201, reference can be made to step S101. For the specific content of step S202 and step S203, reference can be made to step S102 and step S103, which will not be elaborated here.

[0084] Refer to Figure 3 , according to an embodiment of the present invention, another method for setting a dynamic sensor is provided, including the following steps:

[0085] Step S301: Determine the target measurement position of the test piece.

[0086] Step S3011: Obtain the steady-state test data of the test piece.

[0087] Step S3012: Determine the first target measurement position according to the steady-state test data.

[0088] Step S3013: Obtain the dynamic simulation data of the test piece.

[0089] Step S3014: Determine the second target measurement position according to the dynamic simulation data.

[0090] Step S302: Determine the corresponding actual measurement position according to the target measurement position.

[0091] For the specific content of step S301, step S3011, step S3012, step S3013, step S3014, and step S302, reference can be made to step S201, step S2011, step S2012, step S2013, step S2014, and step S202, which will not be elaborated here.

[0092] Step S303: Set a dynamic sensor in the through hole.

[0093] Specifically, step S303 further includes:

[0094] Step S3031: Set a conversion structure on the through hole.

[0095] Step S3032: Set a dynamic sensor on the conversion structure.

[0096] Among them, the conversion structure includes a measurement channel communicating with the through-hole. One end of the measurement channel is provided with an internal thread for cooperating with the dynamic sensor, and the end of the conversion structure far from the internal thread is provided with an external thread or a bolt for cooperating with the through-hole.

[0097] Since the through-hole is not specially processed for installing the dynamic sensor, there is a situation where the specifications of the through-hole and the dynamic sensor do not match. By adding a conversion structure to the through-hole, the through-hole can meet the installation requirements of the dynamic sensor and realize the installation of the dynamic sensor.

[0098] Optionally, the through-hole includes at least one of a static pressure measurement hole, a total parameter measurement hole, and an ignition nozzle hole. The static pressure measurement hole, the total parameter measurement hole, and the ignition nozzle hole are common through-holes communicating with the inside of the test piece. Finding a through-hole that meets the requirements from these holes first can improve the implementation efficiency of the dynamic sensor setting method.

[0099] Exemplarily, in some embodiments, the through-hole is a static pressure measurement hole with a thread specification of M3*0.5, and the specification of the used dynamic sensor is an XTEL-1-90C type high-frequency response Kulite sensor with a thread specification of M2.5*0.45. By correspondingly machining a conversion structure with appropriate internal and external thread specifications, the dynamic sensor can be set in the original static pressure measurement hole.

[0100] Exemplarily, in some embodiments, the through-hole is a total parameter measurement hole. Considering that the total parameter measurement hole is generally equipped with a plug to block it when not in use, the plug of the total parameter measurement hole can be used as the conversion structure, and an internal thread for connecting the dynamic sensor (such as XTEL-1-90C type - M2.5*0.45) is machined on the plug.

[0101] Exemplarily, in some embodiments, there is no internal thread in the through-hole (such as when the aperture of the through-hole is too small), but bolt holes are provided on the outer periphery for flange connection. At this time, a flange is correspondingly provided at the end of the conversion structure far from the internal thread, and the conversion structure is fixed on the test piece through bolts.

[0102] Of course, in addition to the external thread and the bolt, the conversion structure can also be fixed on the test piece by other means. The specific connection and fixing method adopted depends on the original design purpose and connection method of the through-hole, which will not be elaborated here.

[0103] It can be understood that since the through-holes used in the dynamic sensor are not standard dynamic pressure measurement holes, and the dynamic sensor needs to be installed with the help of a conversion structure, the aperture of the through-hole and the pipeline of the conversion structure will cause certain disturbances to the measurement of the dynamic sensor. Generally, the aperture of the through-hole processed by the conversion structure is about 1 mm in diameter.

[0104] In some embodiments, the dynamic sensor is flush-mounted in the conversion structure. Flush mounting means that the sensing surface of the dynamic sensor is as flush as possible with the inner flow path surface of the test piece. Flush mounting is suitable for reducing the disturbance of the dynamic sensor to the flow field and improving the accuracy of dynamic pressure measurement.

[0105] Optionally, in some embodiments, a mathematical model (such as a transfer function) can also be used to post-process the data collected by the dynamic sensor to compensate for the delay or attenuation of pressure in the pipeline or aperture, further improving the accuracy of dynamic data.

[0106] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A method for setting a dynamic sensor, characterized in that, Including: Determine the target measurement positions of the test piece; According to the target measurement positions, determine the corresponding actual measurement positions. The actual measurement positions have an assembly space suitable for on-site assembly of the dynamic sensors. The actual measurement positions have through holes communicating with the inside of the test piece, and the root mean square error of the pressures measured at the target measurement positions and the corresponding actual measurement positions does not exceed the deviation value; Install dynamic sensors in the through holes.

2. The dynamic sensor setting method according to claim 1, wherein The target measurement positions include a first target measurement position. Determining the target measurement positions of the test piece includes: Obtain the steady-state test data of the test piece; According to the steady-state test data, determine the first target measurement position.

3. The dynamic sensor setting method according to claim 2, characterized in that, The steady-state test data includes static pressure measurement data, vibration data, and noise data.

4. The dynamic sensor setting method according to claim 3, wherein The determining the first target measurement position according to the steady-state test data includes at least one of the following: According to the static pressure measurement data, use the positions where the pressure fluctuation exceeds the first threshold as the first target measurement positions; According to the vibration data, use the positions where the amplitude of the test piece exceeds the second threshold as the first target measurement positions; According to the noise data, use the positions where the noise in the test piece exceeds the third threshold as the first target measurement positions.

5. The dynamic sensor setting method according to claim 3, wherein The target measurement positions include a second target measurement position. Determining the target measurement positions of the test piece further includes: Obtain the dynamic simulation data of the test piece; According to the dynamic simulation data, determine the second target measurement position.

6. The dynamic sensor setting method according to claim 5, characterized in that The determining the second target measurement position according to the dynamic simulation data includes: Compare the static pressure measurement data and the dynamic simulation data, and judge whether the dynamic simulation data is credible according to the comparison result; If the judgment result is credible, determine the second target measurement position of the test piece according to the dynamic simulation data.

7. The dynamic sensor setting method according to claim 6, wherein The determining the second target measurement position of the test piece according to the dynamic simulation data includes at least one of the following: The position where the pressure fluctuation coefficient cp exceeds the fourth threshold is used as the second target measurement position, where cp = (P max - P min ) / P ave , P max is the maximum pressure, P min is the minimum pressure, P ave is the average pressure; Use the positions where there are vortices, recirculation, or secondary flows in the flow field as the second target measurement positions; Use the positions where there are low-frequency high-amplitude signals other than the rotor fundamental frequency in the frequency domain as the second target measurement positions.

8. The dynamic sensor setting method according to claim 1, wherein The installing the dynamic sensors in the through holes includes: Install a conversion structure on the through hole; Install the dynamic sensors on the conversion structure; Wherein, the conversion structure includes a measurement channel communicating with the through hole. One end of the measurement channel is provided with internal threads for cooperating with the dynamic sensors, and the end of the conversion structure away from the internal threads is provided with external threads or bolts for cooperating with the through hole.

9. The dynamic sensor setting method according to claim 8, characterized in that, The dynamic sensors are flush-mounted in the conversion structure.

10. The method for setting a dynamic sensor according to claim 8, wherein The through holes include at least one of static pressure measurement holes, total parameter measurement holes, and ignition nozzle holes.

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