Method for correcting humidity of equivalent flow rate of convection inlet in fan pressurization stage test piece

Abstract

The application discloses a kind of fan pressurization stage test piece internal content import conversion flow humidity correction method, comprising: real-time measurement obtains the front and rear parameters of fan pressurization stage test piece, the relative humidity of test piece internal content export environment after calculating fan pressurization stage test piece by front and rear parameters, the relative humidity of test piece internal content export environment after, to the internal content import conversion flow of fan pressurization stage test piece is carried out humidity correction, to obtain internal content import conversion flow.The beneficial effects of the present application are that in the process of test, without setting up internal content export relative humidity measuring device, without affecting the premise that the flow field of test piece internal content export, real-time calculation obtains the relative humidity of test piece internal content export, and then the internal content import conversion flow of test piece is carried out humidity correction, conducive to the influence of environmental humidity on test piece performance in the whole process of test process.

Description

Technical Field

[0001] This invention relates to the field of aero-engine component testing, specifically to a method for correcting humidity of the inlet flow rate within a fan booster stage test component. Background Technology

[0002] The fan booster stage component is a dual-duct test specimen. During the test, the performance parameters of the inner and outer ducts of the test specimen need to be measured separately. Among them, the physical flow rate of the inner duct of the fan booster stage is measured using a venturi tube: the venturi tube is installed after the outlet of the inner duct of the test specimen, as shown in Figure 1. The physical flow rate of the inner duct of the test specimen can be calculated by measuring the upstream static pressure, throat static pressure, and upstream total temperature of the venturi tube.

[0003] The relative humidity of the environment in which the test specimen is located can affect its performance parameters. Therefore, humidity correction is necessary when required. Generally, a humidity sensor is used to measure the relative humidity of the environment during testing, and the test data is corrected for humidity based on the measurement results.

[0004] Due to limitations in the size and installation conditions of humidity sensors, humidity sensors are only installed before the intake system of the test specimen to measure the relative humidity of the intake air, and humidity sensors are almost never installed in the venturi tube connected to the inner cavity of the test specimen. Therefore, it is impossible to directly measure the relative humidity after the outlet of the inner cavity of the fan booster stage test specimen. Furthermore, the total temperature and total pressure at the outlet of the inner cavity of the fan booster stage test specimen are higher than those before the test specimen. According to the definition of relative humidity, the relative humidity after the outlet of the inner cavity of the test specimen changes compared to the relative humidity before the test specimen. Therefore, it is impossible to directly use the relative humidity before the test specimen for humidity correction of the inner cavity flow rate. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a method for humidity correction of the inlet flow rate of a fan booster stage test piece, which uses calculation to obtain the relative humidity of the humid air after the fan core outlet, and then corrects the humidity of the fan booster stage core performance parameters.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A method for correcting humidity inlet flow rate of a fan booster stage test specimen, characterized by comprising:

[0008] Step S1: Measure and obtain the parameters before and after the test of the fan booster stage. The parameters before and after the test include the relative humidity of the environment before the test, the total temperature of the environment before the test, the total pressure of the environment before the test, the total temperature after the outlet of the test, and the total pressure after the outlet of the test.

[0009] Step S2: Calculate the relative humidity of the environment after the outlet of the test piece of the fan booster stage test piece using the parameters obtained in step S1.

[0010] Step S3: Using the relative humidity of the environment after the outlet of the test specimen obtained in step S2, the inlet flow rate of the fan booster stage test specimen is corrected for humidity to obtain the inlet flow rate of the test specimen.

[0011] This technical solution allows for the acquisition of relative humidity after the outlet of the test specimen without installing a relative humidity measuring device at the outlet of the fan booster stage. Its beneficial effect is that humidity correction of the internal performance parameters can be performed without affecting the flow field after the outlet of the internal specimen or the Venturi tube measurement, thus ensuring measurement accuracy to the greatest extent.

[0012] Preferably, in step S1, the preceding and following parameters are directly measured and real-time data is collected by the measuring device.

[0013] This technical solution employs a real-time measurement device to obtain calculation parameters at each real-time stage, thereby enabling real-time humidity correction of the inlet flow rate within the test specimen. This facilitates monitoring the impact of environmental humidity on the test specimen's performance throughout the entire testing process.

[0014] Preferably, in step S2, the method for calculating the relative humidity of the environment after the outlet of the test piece includes step S21, assuming the following calculation premise: taking the humid air passing through the measurement section of the inlet flow pipe at a certain moment as the research object, and considering the humid air as an ideal gas, the process of the humid air being heated and pressurized through the fan booster stage test piece is divided into two sub-processes: isothermal pressurization and isobaric heating. In the two sub-processes, under the condition that there is no new source of water vapor, the ratio of the partial pressure of water vapor in the humid air to the partial pressure of dry air remains unchanged.

[0015] This technical solution specifies the assumed calculation premises to facilitate engineering calculations in subsequent stages.

[0016] Preferably, in step S2, the method for calculating the relative humidity of the environment after the outlet of the test specimen is as follows, further including:

[0017] Step S22, under the assumptions of step S21, under the ideal gas assumption, the pressure ratio of the water vapor partial pressure to the dry air partial pressure in the humid air before and after the test piece is equal;

[0018] Step S23: Based on step S22, using the formula that the humid air pressure is the sum of the partial pressure of water vapor in the humid air and the partial pressure of dry air, calculate the total ambient pressure in front of the test specimen and the total pressure after the outlet of the test specimen.

[0019] Step S24: Using the total ambient temperature, total ambient pressure, relative humidity, total temperature after the outlet of the test specimen, and total pressure after the outlet of the test specimen measured in step S1, calculate the partial pressure of water vapor in the humid air in front of the test specimen and the partial pressure of dry air in front of the test specimen according to the relative humidity calculation formula; then calculate the partial pressure of water vapor in the humid air after the outlet of the test specimen and the partial pressure of dry air after the outlet of the test specimen.

[0020] Step S25: Based on the total temperature after the outlet of the test specimen, the saturated vapor pressure of water vapor at the total temperature after the outlet of the test specimen is obtained through the formula relating water vapor saturated vapor pressure and temperature. The water vapor partial pressure and water vapor saturated vapor pressure after the outlet of the test specimen are substituted into the relative humidity calculation formula to calculate the relative humidity of the environment after the outlet of the test specimen.

[0021] In this technical solution, when performing humidity correction on the performance parameters of the fan booster stage, it is necessary to obtain the relative humidity data after the outlet of the test specimen. However, installing a relative humidity measuring device after the outlet of the fan booster stage will inevitably affect the accuracy of measurements such as the static pressure inside the venturi tube. Therefore, it is necessary to use calculation methods to obtain the relative humidity data of the environment after the outlet of the test specimen, and then perform humidity correction on the performance parameters of the fan booster stage.

[0022] Preferably, in step S3, the humidity correction method for correcting the humidity of the internal inlet converted flow rate of the fan booster stage test piece is as follows:

[0023] Step S31: Calculate the moisture content of the humid air after the outlet of the test specimen and the gas constant of the humid air after the outlet of the test specimen based on the relative humidity of the environment after the outlet of the test specimen.

[0024] Step S32: Calculate the specific heat capacity of the humid air after the outlet of the test specimen using the moisture content of the humid air after the outlet of the test specimen and the specific heat capacity of the dry air after the outlet of the test specimen. Calculate the specific heat ratio of the humid air after the outlet of the test specimen based on the specific heat capacity of the humid air after the outlet of the test specimen and the gas constant of the humid air after the outlet of the test specimen.

[0025] Step S33: The humidity-corrected portion of the inlet flow rate is the internal physical flow rate. The humidity-corrected internal physical flow rate can be obtained by using the humidity-corrected gas constant of the moist air after the outlet of the internal part of the test specimen and the humidity-corrected specific heat ratio of the moist air after the outlet of the internal part of the test specimen.

[0026] Step S34: The humidity-corrected internal inlet converted flow rate can be obtained by using the humidity-corrected internal physical flow rate.

[0027] In this technical solution, when performing humidity correction on the performance parameters of the fan booster stage, the relative humidity of the humid air after the fan outlet is obtained by calculation, and the performance parameters of the fan booster stage are further corrected for humidity.

[0028] Preferably, the relative humidity of the environment after the outlet of the test specimen is located at the measurement section of the Venturi tube.

[0029] In this technical solution, the relative humidity of the environment after the outlet of the test piece is more accurate when it is located at the measurement section of the Venturi tube.

[0030] Preferably, in step S32, the specific heat ratio of the humid air after the outlet of the test specimen is calculated as the ratio between the specific heat capacity of the humid air after the outlet of the test specimen and the difference between the specific heat capacity of the humid air after the outlet of the test specimen and the gas constant of the humid air after the outlet of the test specimen.

[0031] In this technical solution, the method for calculating the specific heat ratio of the moist air after the outlet of the test specimen is designed to obtain a more accurate specific heat ratio of the moist air after the outlet of the test specimen.

[0032] Preferably, the specific heat ratio of dry air after the outlet of the test specimen is calculated from the total temperature and constant coefficient after the outlet of the test specimen.

[0033] In this technical solution, the method for calculating the specific heat ratio of dry air after the outlet of the test specimen is designed to obtain a more accurate specific heat ratio of dry air after the outlet of the test specimen.

[0034] Preferably, in step S33, the humidity-corrected internal physical flow rate is further corrected by the following parameters: the Venturi flow coefficient after the outlet of the test specimen, the diameter of the Venturi tube after the outlet of the test specimen, the humidity-corrected gas expandability coefficient, the ratio of the throat diameter of the Venturi tube to the upstream diameter, the upstream static pressure of the Venturi tube, the throat static pressure of the Venturi tube, and the Mach number of the Venturi tube measurement section considering humidity correction.

[0035] In this technical solution, more data parameters are introduced in order to obtain a more accurate humidity-corrected intrinsic physical flow rate.

[0036] The significant advantage of this invention is that it allows for the measurement of the total temperature T of the test specimen before the outlet without installing a relative humidity measuring device. t0 Total pressure P t0 Relative humidity RH0 and total internal temperature T of the test specimen after outlet tco Total pressure P tcoThe relative humidity (RH) at the outlet of the test specimen was calculated using the definition of relative humidity under the ideal gas assumption. co .

[0037] The beneficial effect of this invention is that, during the experiment, without setting up a relative humidity measuring device after the inner inlet outlet and without affecting the flow field after the inner inlet outlet of the test specimen, the relative humidity after the inner inlet outlet of the test specimen is calculated in real time based on the total temperature, total pressure, and relative humidity before the fan booster stage test specimen and the total temperature and total pressure after the inner inlet outlet of the test specimen. This allows for real-time humidity correction of the converted flow rate at the inner inlet of the test specimen. This facilitates the monitoring of the impact of environmental humidity on the performance of the test specimen throughout the entire experiment. Attached Figure Description

[0038] Figure 1A-1B This refers to the flow measurement device and related parameter acquisition location within the outlet of the fan booster stage test piece of this invention.

[0039] Figure 2 This is a schematic diagram illustrating the actual process and idealized assumption of humid air passing through the fan booster stage in this invention.

[0040] Figure 3A This is a flowchart of the method for correcting the humidity of the inlet flow rate within the test piece of the fan booster stage of the present invention.

[0041] Figure 3B This is a flowchart of the method for calculating the relative humidity of the environment after the outlet of the test specimen of the present invention.

[0042] Figure 3C This is a flowchart of the humidity correction method for the inlet converted flow rate of the fan booster stage test specimen according to the present invention.

[0043] Figure 3D This is a flowchart of the inlet flow rate and humidity correction method for the fan booster stage test specimen in an embodiment of the present invention.

[0044] Component markings in the diagram:

[0045] 1. Exhaust tower

[0046] 2. Internal exhaust valve

[0047] 3. Exhaust volute

[0048] 4. Transitional Section

[0049] 5 Venturi tubes

[0050] 6. Total ambient pressure P after the test specimen tc0 The total ambient temperature T after the test specimen exits the test chamber tco

[0051] 7 P sven_upThe static pressure upstream of the venturi tube

[0052] 8 P sven Static pressure at the throat of the Venturi tube

[0053] 9. Exhaust system

[0054] 10 Internal Exhaust

[0055] 11 Test Specimens

[0056] 12 Inlet flow pipe

[0057] 13. The relative humidity (RH) of the environment in front of the test specimen is 0, and the total temperature (T) of the environment in front of the test specimen is 0. t0 Total ambient pressure P before the test specimen t0 . Detailed Implementation

[0058] The present invention is further illustrated below by way of examples, but the invention is not limited to the scope of these examples. Experimental methods not specifically described in the following examples are performed according to conventional methods and conditions, or as selected according to the product instructions.

[0059] When performing humidity correction for the performance parameters of a fan booster stage, it is necessary to obtain the relative humidity data after the outlet of the test specimen. However, installing a relative humidity measuring device after the outlet of the fan booster stage will inevitably affect the accuracy of measurements such as the static pressure inside the venturi tube. Therefore, it is necessary to use calculation methods to obtain the relative humidity data of the moist air after the outlet of the fan booster stage, and then perform humidity correction for the performance parameters of the fan booster stage.

[0060] Using the method described in this invention, the parameters before and after the fan booster stage test specimen can be measured without installing a relative humidity measuring device after the inner cavity outlet, the relative humidity after the inner cavity outlet can be calculated, and then the inner cavity performance parameters of the fan booster stage test specimen can be corrected for humidity.

[0061] Example

[0062] like Figure 3A , 3B As shown in Figures 3C and 3D, the specific implementation process of the method for correcting the converted flow rate and humidity of the test piece for the fan booster stage of this patent can be divided into three parts: measurement of parameters before and after the test piece, calculation of relative humidity after the outlet of the test piece, and correction of the converted flow rate and humidity at the inlet of the test piece.

[0063] 1. Measurement of parameters before and after the test specimen

[0064] like Figure 1A-1BAs shown, this invention relates to the flow measurement device and related parameter acquisition location after the outlet of the fan booster stage test piece. External duct exhaust 9 is performed at the upper part of the exhaust tower 1. The bottom of the exhaust tower 1 is connected to the internal exhaust valve 2, exhaust volute 3, internal transition section 4, test piece 11, and inlet flow pipe 12 via a Venturi tube 5 for internal exhaust 10. During the test, a relative humidity measuring device is installed in front of the fan booster stage test piece to measure the relative humidity RH0 of the environment in front of the test piece. The total temperature T of the environment in front of the fan booster stage test piece is also measured. t0 Total ambient pressure P before the test specimen t0 data.

[0065] According to the definition of relative humidity, the relative humidity of the environment in front of the test specimen is the ratio of the partial pressure of water vapor in the moist air in front of the test specimen to the partial pressure of water vapor in the saturated air at the current ambient temperature. See Equation 1 for details.

[0066]

[0067] Saturated air refers to air at a given temperature where the partial pressure of water vapor reaches the saturation pressure at that temperature. Under saturated air conditions, the air no longer has the ability to absorb moisture. The ratio of the partial pressures of water vapor in saturated air can be calculated using a fitting formula, as detailed in Equation 2.

[0068]

[0069] The total ambient temperature T in front of the test specimen can be measured. t0 Substitute equation 2 to obtain the saturated vapor pressure P of the specimen under the pre-existing conditions. v,Tt0,max .

[0070] Based on Equation 1, the relative humidity RH0 measured before the test specimen and the previously calculated P... v,Tt0,max The partial pressure of water vapor P in the humid air under the ambient conditions before the test specimen can be obtained. v,Tt0 .

[0071] 2. Calculation of relative humidity after the outlet of the test specimen

[0072] The process of humid air passing through the fan-pressurized test specimen is a "heating and pressurization" process. The increase in temperature leads to an increase in the saturated vapor pressure P of the environment after the test specimen. v,Ttco,max Compared to the saturated vapor pressure P of the test specimen v,Tt0,max Changes occurred. Furthermore, no new source of water vapor was introduced during the passage of humid air through the test specimen.

[0073] like Figure 2 As shown, the process of humid air passing through the test specimen is considered as two parts: "isothermal pressurization" and "isobaric heating". A sample of humid air passing through the inlet flow meter section at a specific moment is taken. As the research object, under the assumption that moist air is an ideal gas, equal masses of moist air... In the "isothermal pressurization" process without an additional source of water vapor, it is considered an independent closed system, and the ratio of the partial pressure of water vapor in the humid air to the partial pressure of dry air remains constant. That is:

[0074]

[0075] Similarly, assuming the moist air is an ideal gas, during an isobaric heating process with no new source of water vapor, the ratio of the partial pressure of water vapor in the moist air to the partial pressure of dry air remains constant. That is:

[0076]

[0077] Therefore, under the ideal gas assumption, The pressure ratio of the partial pressure of water vapor to the partial pressure of dry air in the moist air before and after the test specimen is equal.

[0078]

[0079] The pressure of moist air is the sum of the partial pressure of water vapor and the partial pressure of dry air.

[0080] P h =P v +P d Formula 6

[0081] Therefore, the total ambient pressure P in front of the test specimen t0 The total environmental pressure P after the test specimen tc0 It can be written separately as:

[0082] P t0 =P v,Tt0,Pt0 +P d,Tt0,Pt0 Formula 7

[0083] P tc0 =P v,Ttco,Ptco +P d,Ttco,Ptco Formula 8

[0084] During the test, the total ambient temperature T before the test piece enters the inlet was measured. t0 Total ambient pressure P before the test specimen is imported t0 , relative humidity RH0 and total ambient temperature T after the test specimen exit tco The total environmental pressure P after the outlet of the test specimen tc0 According to Equation 1, the partial pressure of water vapor P in the moist air in front of the test specimen can be calculated. v,Tt0,Pt0 This allows us to obtain the partial pressure P of the dry air in front of the test specimen. d,Tt0,Pt0 Then, based on equations 4 to 8 and equation 1, the water vapor partial pressure P of the test specimen can be solved simultaneously. v,Ttco,PtcoDry air partial pressure P d,Ttco,Ptco .

[0085] Based on the total temperature Tt of the test piece co P at the total temperature after the test specimen was obtained by using the relationship between the saturated vapor pressure of water vapor and temperature (Equation 2). v,Ttco,max P v,Ttco,Ptco P v,Ttco,max Substituting into Equation 1, the relative humidity (RH) after the outlet of the test specimen can be obtained. co .

[0086] 3. Internal import conversion flow rate and humidity correction

[0087] The relative humidity (RH) at the cross-section of the Venturi tube at the outlet of the test specimen was measured. co The moisture content of the humid air after the outlet of the test specimen (see Equation 9) and the gas constant of the humid air after the outlet of the test specimen (see Equation 10) can be obtained.

[0088]

[0089]

[0090] The specific heat capacity of moist air is equal to its moisture content d. co Specific heat capacity of dry air Cp co The function (after the outlet of the test specimen) yields the specific heat ratio of the moist air after the outlet of the test specimen.

[0091]

[0092]

[0093]

[0094]

[0095] In Equation 12, the polynomial coefficients used to calculate the isobaric specific heat capacity of water vapor are as follows.

[0096] C0 = 1.79

[0097] C1 = 0.107

[0098] C2 = 0.586

[0099] C3 = -0.20

[0100] In Equation 13, γ co The specific heat ratio of the dry air after the outlet of the test specimen is given. Its calculation method is shown in Equation 15:

[0101]

[0102] B1 = 0.72806730 × 10 1 ;

[0103] B2 = -0.14341481 × 10 -2 ;

[0104] B3 = 0.23482926 × 10 -5 ;

[0105] B4 = -0.10484129 × 10 -8 ;

[0106] B5 = 0.12429040 × 10 -12 ;

[0107] 242K≤T t0 ≤1000K

[0108] The specific heat ratio γ of the moist air after the Venturi tube outlet within the test specimen can be obtained according to equations 10, 12, 13, 14, and 15. hco .

[0109]

[0110] The humidity-corrected portion of the inlet flow rate is the internal physical flow rate. The humidity-corrected gas constant R at the outlet is used. h Humidity correction content, specific heat ratio of air after outlet γ hco The humidity-corrected intrinsic physical flow rate can then be obtained.

[0111] For the expression of the physical flow rate considering humidity correction, please refer to Equations 17 to 23.

[0112]

[0113] ΔP ven =P sven_up -P sven Formula 18

[0114]

[0115]

[0116]

[0117]

[0118]

[0119] Among them, W hco To correct the physical flow rate for the internal humidity of the test specimen, C d_venD is the flow coefficient of the Venturi tube after the outlet of the test specimen. ven ε is the diameter of the Venturi tube after the outlet of the test piece. h The coefficient of expansion of the gas is the humidity-corrected coefficient, β is the ratio of the diameter at the throat of the Venturi tube to the diameter at the upstream end, and P is the pressure coefficient. sven_up P is the upstream static pressure of the venturi tube. sven For the static pressure at the throat of the Venturi tube, Ma hven_up Mach number of the venturi tube measuring section considering humidity correction.

[0120] Therefore, considering the humidity correction, the expression for the inlet flow rate conversion is shown in Equation 24.

[0121]

[0122] P in T represents the total pressure at the inlet of the fan booster stage test piece. in For the total inlet temperature of the fan booster stage test piece, P ref For reference pressure (101325 Pa), T ref Reference temperature (288.15K).

[0123] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for correcting the humidity of the equivalent flow rate of the convection inlet of a fan pressurization stage test piece, characterized by, The method comprises the following steps: Step S1, measuring and obtaining front and rear parameters of the fan pressurization stage test piece, wherein the front and rear parameters comprise relative humidity of the environment in front of the test piece, total temperature of the environment in front of the test piece, total pressure of the environment in front of the test piece, total temperature behind the outlet of the internal channel of the test piece, and total pressure behind the outlet of the internal channel of the test piece; Step S2, calculating the relative humidity of the environment behind the outlet of the internal channel of the test piece according to the front and rear parameters measured in step S1; Step S3, humidity correcting the internal channel inlet equivalent flow of the fan pressurization stage test piece according to the relative humidity of the environment behind the outlet of the internal channel of the test piece obtained in step S2, so as to obtain the internal channel inlet equivalent flow of the test piece. In step S2, the calculation method of the relative humidity of the environment behind the outlet of the internal channel of the test piece comprises the following steps: Step S21, assuming a calculation premise: taking the wet air passing through the measurement section of the inlet flow pipe at a certain moment as the research object, and dividing the process of heating and pressurizing the wet air by the fan pressurization stage test piece into two sub-processes of isothermal pressurization and isobaric heating on the premise of regarding the wet air as ideal gas, wherein the ratio of the water vapor partial pressure to the dry air partial pressure of the wet air remains unchanged in the two sub-processes under the condition that there is no new source of water vapor; Step S22, under the assumption premise of step S21, the pressure ratio of the water vapor partial pressure to the dry air partial pressure of the wet air before and after the test piece is equal under the ideal gas assumption; Step S23, on the basis of step S22, the total pressure of the environment in front of the test piece and the total pressure behind the outlet of the internal channel of the test piece are calculated according to the calculation formula that the gas pressure of the wet air is the sum of the water vapor partial pressure and the dry air partial pressure of the wet air; Step S24, using the total temperature of the environment in front of the test piece, the total pressure of the environment in front of the test piece, the relative humidity of the environment in front of the test piece, the total temperature behind the outlet of the internal channel of the test piece, and the total pressure behind the outlet of the internal channel of the test piece measured in step S1, the water vapor partial pressure of the wet air before the test piece and the dry air partial pressure before the test piece are calculated according to the relative humidity calculation formula; and then the water vapor partial pressure of the wet air behind the outlet of the internal channel of the test piece and the dry air partial pressure behind the outlet of the internal channel of the test piece are calculated; Step S25, according to the total temperature behind the outlet of the internal channel of the test piece, the saturated steam pressure of water vapor at the total temperature behind the outlet of the internal channel of the test piece is obtained through the relationship formula between the saturated steam pressure of water vapor and the temperature, and the relative humidity of the environment behind the outlet of the internal channel of the test piece is calculated by substituting the water vapor partial pressure and the saturated steam pressure of water vapor behind the test piece into the relative humidity calculation formula.

2. The method of claim 1, wherein, In step S1, the front and rear parameters are directly measured and collected by a measuring device.

3. The method of claim 1, wherein, In step S3, the humidity correction method for humidity correcting the internal channel inlet equivalent flow of the fan pressurization stage test piece is as follows: Step S31, according to the relative humidity of the environment behind the outlet of the internal channel of the test piece, the humidity content of the wet air behind the outlet of the internal channel of the test piece and the gas constant of the wet air behind the outlet of the internal channel of the test piece are calculated. Step S32: Calculate the specific heat capacity of the humid air after the outlet of the test specimen using the moisture content of the humid air after the outlet of the test specimen and the specific heat capacity of the dry air after the outlet of the test specimen. Calculate the specific heat ratio of the humid air after the outlet of the test specimen based on the specific heat capacity of the humid air after the outlet of the test specimen and the gas constant of the humid air after the outlet of the test specimen. Step S33: The humidity-corrected portion of the inlet flow rate is the internal physical flow rate. The humidity-corrected internal physical flow rate can be obtained by using the humidity-corrected gas constant of the moist air after the outlet of the internal part of the test specimen and the humidity-corrected specific heat ratio of the moist air after the outlet of the internal part of the test specimen. Step S34: The humidity-corrected internal inlet converted flow rate can be obtained by using the humidity-corrected internal physical flow rate.

4. The method of claim 1 or 3, wherein The relative humidity of the environment after the outlet of the test specimen is located at the venturi tube measurement section.

5. The method of claim 3, wherein the method is used for a fan- pressurized stage test article inner containment inlet corrected flow humidity correction. In step S32, the specific heat ratio of the humid air after the outlet of the test specimen is calculated as follows: the ratio between the specific heat capacity of the humid air after the outlet of the test specimen and the difference between the specific heat capacity of the humid air after the outlet of the test specimen and the gas constant of the humid air after the outlet of the test specimen.

6. The method of claim 5, wherein the method is used for a fan- pressurized stage test article inner containment inlet corrected flow humidity correction. The specific heat ratio of dry air after the outlet of the test specimen is calculated from the total temperature and constant coefficient after the outlet of the test specimen.

7. The method of claim 3, wherein the method is used for a fan- pressurized stage test article inner containment inlet corrected flow humidity correction. In step S33, the humidity-corrected internal physical flow rate is further corrected by the following parameters: the Venturi flow coefficient after the outlet of the test specimen, the diameter of the Venturi tube after the outlet of the test specimen, the humidity-corrected gas expandability coefficient, the ratio of the throat diameter of the Venturi tube to the upstream diameter, the upstream static pressure of the Venturi tube, the throat static pressure of the Venturi tube, and the Mach number of the Venturi tube measurement section considering humidity correction.

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