A multi-point dynamic measurement device with total temperature and total pressure measurement points arranged in back-to-back directions

Abstract

The present invention belongs to the technical field of flow field testing, and specifically relates to a multi-point dynamic measurement device with total temperature and total pressure measuring points arranged in back-to-back directions, which is composed of a head, a support rod, a pressure sensing hole, a dynamic pressure sensor, a dynamic temperature sensor, a thermal insulation seal, a dynamic pressure sensor cable, a dynamic temperature sensor cable, and a lead channel. The head of the device is cylindrical, and has pressure sensing holes sparse in the middle and dense at both ends opened on the surface along the axial direction. A dynamic pressure sensor is encapsulated inside, and the pressure sensing hole adopts a minimally lossy and smooth structural design, with the center lines facing the expected incoming flow direction respectively. The dynamic temperature sensor and the pressure sensing hole are arranged in back-to-back directions and the center lines are collinear, and the dynamic temperature sensor slightly protrudes out of the cylindrical surface of the head. The present invention can realize the simultaneous measurement of the dynamic total temperature and total pressure of multiple points in the blade inlet, outlet, and interstage flow field in the impeller machine flow channel, and has the characteristics of large insensitive angle for measuring airflow, high measurement accuracy, high reliability, and high spatial resolution.

Description

Technical Field

[0001] The present invention belongs to the technical field of dynamic total temperature and total pressure testing of flow fields, and specifically relates to a multi-point dynamic measuring device with total temperature and total pressure measuring points arranged in back-to-back order, which is suitable for simultaneous and accurate measurement of multi-point dynamic total temperature and total pressure in blade inlet, outlet and inter-stage flow fields in an impeller machinery flow channel. Background Art

[0002] When testing impellers such as compressors, turbines, pumps, blowers, and fans, it is usually necessary to simultaneously measure the dynamic total temperature and total pressure at multiple points in the flow channel, including the blade row inlet, outlet, and interstage. However, the mainstream direction of the blade row distribution along the blade height varies greatly, and the dynamic total temperature and total pressure also vary greatly. Therefore, it is very difficult to simultaneously measure the dynamic total temperature and total pressure at multiple points along the blade height direction. Existing measurement technologies have the following problems:

[0003] 1. Use a single-point dynamic total pressure probe to measure the total pressure at different positions with the help of a displacement mechanism installed on the casing. Also use a single-point dynamic total temperature probe to measure the dynamic total temperature at the same position with the help of a displacement mechanism installed on the casing. When using a single-point dynamic total pressure probe and a single-point dynamic total temperature probe alone, on the one hand, the measurement time is long and the test cost is high. More importantly, the incoming flow conditions may change to a certain extent. On the other hand, the measurement point positions of different probes are affected by the positioning of the displacement mechanism, which will cause the two measurement positions to be different. The flow field parameters measured by the two probes are not on the same streamline, resulting in a huge error.

[0004] 2. The existing multi-point dynamic pressure measurement devices mainly include total pressure combs, which are generally composed of total pressure pipes with the same direction. The measurement error is large for flow fields with large changes in the incoming flow direction, and the dynamic total temperature cannot be measured at the same time.

[0005] 3. The existing dynamic pressure measurement device does not have a smooth transition in the pressure sensing hole. Therefore, when the incoming flow angle is large, flow separation will occur at the pressure sensing hole, resulting in a certain total pressure loss. Moreover, the pulsation caused by the separation will interfere with the dynamic total pressure measurement result, resulting in inaccurate measurement results.

[0006] 4. When measuring dynamic pressure, the dynamic pressure sensor is usually encapsulated in the pressure sensing hole. In order to ensure the frequency response of the dynamic pressure sensor, the dynamic pressure sensor is very close to the pressure sensing hole. When the temperature changes drastically, the dynamic pressure sensor will experience temperature drift, affecting the accuracy of the measurement results. However, existing dynamic pressure measurement devices rarely consider the temperature drift phenomenon, which will lead to inaccurate total pressure measurement results.

[0007] 5. The existing dynamic temperature and pressure combination probe is a single-point measurement and cannot achieve multi-point simultaneous measurement. Moreover, the dynamic temperature sensor and pressure sensing hole are arranged on the windward side of the probe facing the incoming flow, but this requires a relatively large space on the probe surface, resulting in poor spatial resolution of flow field measurement, and the temperature and pressure measurement points are not on the same streamline, which will lead to large measurement errors. In addition, the dynamic temperature sensor is directly washed by the fluid and is easily damaged; it is easily affected by oil and dust in the flow field; the airflow insensitive angle is small, and when the pitch angle or deflection angle of the incoming flow to be measured is large, the airflow cannot be fully stagnant; at the same time, the heat exchange on the surface of the dynamic temperature sensor is insufficient, and the dynamic total temperature measurement error is large.

[0008] Due to the above problems, the existing measurement technology cannot measure the dynamic total temperature and total pressure at multiple points of the blade row inlet, outlet, and interstage flow field in the impeller machine flow channel, while researchers hope to obtain these parameters at the same time for design verification and diagnosis, so as to improve the design. Therefore, there is an urgent need for a multi-point dynamic total temperature and total pressure measurement device to achieve simultaneous and accurate measurement of the dynamic total temperature and total pressure at multiple points of the blade row inlet, outlet, and interstage flow field in the flow channel. Summary of the invention

[0009] The technical problems to be solved by the present invention are: single-point measurement is time-consuming and has high experimental costs, and it is impossible to ensure that the dynamic total temperature and total pressure measuring points are on the same streamline; the existing multi-point measurement device can only realize the measurement of dynamic total pressure, and cannot measure the dynamic total temperature of multiple points at the same time; the pressure sensing hole structure of the existing dynamic pressure measurement device is unreasonable, the total pressure measurement loss is large, the airflow insensitive angle is small, and the flow separation interferes with the dynamic total pressure measurement; temperature drift causes errors in the total pressure measurement; the existing dynamic temperature and pressure combination probe is large in size and low in spatial resolution, and cannot measure the dynamic total temperature and total pressure on the same streamline, causing measurement errors; the dynamic temperature sensor is facing the mainstream, easy to be damaged, and easily affected by oil and dust in the flow field. The airflow insensitive angle is small. When the pitch angle or deflection angle of the incoming flow to be measured is large, the airflow cannot be fully stagnant. At the same time, the heat exchange on the surface of the dynamic temperature sensor is insufficient, and the total temperature measurement error is large.

[0010] The present invention reasonably designs the position and size of the dynamic temperature sensor and the pressure sensing hole, so as to realize the simultaneous measurement of multi-point dynamic total temperature and total pressure; the total pressure hole adopts a micro-loss and smooth structure design, which reduces the total pressure loss and separation disturbance in a wider range of incoming flow angles and improves the measurement accuracy; the dynamic temperature sensor is used to play a certain correction and protection role on the dynamic pressure sensor, eliminates the measurement error caused by the temperature drift of the dynamic pressure sensor, and avoids the actual temperature exceeding the upper limit of the normal working temperature range of the dynamic pressure sensor; abandons the traditional total temperature device design concept, does not follow the dynamic temperature sensor facing the mainstream, and does not use a stagnation cover to stagnate the airflow to The invention is not designed to realize the method of total temperature measurement, but based on the applicant's many years of research, creatively proposed a layout and structural design in which the dynamic temperature sensor is placed on the leeward side of the head of the device with its back to the mainstream, and the dynamic temperature sensor is facing the pressure sensing hole, which can ensure the dynamic total temperature and total pressure measurement of the same streamline; effectively reduce the scouring of the dynamic temperature sensor by the airflow and the influence of oil droplets, dust, etc. mixed in the airflow on the dynamic temperature sensor, thereby improving the service life of the dynamic temperature sensor; effectively reduce the size of the head and improve the spatial resolution; strengthen the convective heat exchange between the airflow and the dynamic temperature sensor, and the temperature recovery coefficient is high and stable within a larger deflection angle range.

[0011] The technical solution of the present invention is:

[0012] 1. A multi-point dynamic measurement device with total temperature and total pressure measuring points arranged in back-to-back order, comprising a head (1), a support rod (2), a pressure sensing hole (3), a dynamic pressure sensor (4), a dynamic temperature sensor (5), a heat-insulating seal (6), a dynamic pressure sensor cable (7), a dynamic temperature sensor cable (8), and a lead-in channel (9), characterized in that: the head (1) is cylindrical, with a plurality of pressure sensing holes (3) at different axial positions on the surface, a dynamic pressure sensor (4) is encapsulated inside, and the pressure sensing holes (3) are respectively oriented toward the expected incoming flow direction; a mounting groove for mounting a heat-insulating seal (6) is formed on the leeward side of the head (1) corresponding to each pressure sensing hole (3), and the dynamic temperature sensor (5) is respectively fixed on the heat-insulating seal (6); the dynamic pressure sensor cable (7) and the dynamic temperature sensor cable (8) are led out from the tail end of the support rod (2) through the lead-in channel (9) through the head (1).

[0013] 2. Furthermore, the diameter of the head (1) is 1 mm to 6 mm, the lead channel (9) is located at the center of the head (1) and has a diameter of 1 / 4 to 1 / 2 of the diameter of the head (1), the outer diameter of the pressure sensing hole (3) is 1 / 5 to 1 / 2 of the diameter of the head (1), and the inner diameter is 0.2 mm to 2 mm, which is not larger than the outer diameter of the pressure sensing hole (3).

[0014] 3. Furthermore, the pressure sensing holes (3) are distributed sparsely in the middle and densely at both ends along the axial direction of the head (1). The center lines of the pressure sensing holes (3) closest to the two ends of the head (1) are half the outer diameter of the pressure sensing holes (3) at both end surfaces. The axial distance between the center lines of the first pressure sensing hole (3) and the second pressure sensing hole (3) near the end is 1 to 4 mm, and the axial distance between the center lines of the remaining two adjacent holes is 2 to 6 mm. The directions of the center lines of the holes are not the same.

[0015] 4. Further, the wall surface of the pressure sensing hole (3) is formed by a slight loss smooth curve: The curve is formed by rotating a portion of the curve and intersecting the cylindrical surface of the head (1), wherein the value of a is 1 to 4 times the inner diameter of the pressure sensing hole (3), one end of the curve is tangent to the surface of the head (1), and the other end is perpendicular to the center line of the head (1), and the center line of the pressure sensing hole (3) is orthogonal to the center line of the head (1).

[0016] 5. Furthermore, the dynamic temperature sensor (5) is located on the center line of the pressure sensing hole (3) and extends out of the wall of the head (1) by 0.2 mm to 1 mm. The dynamic temperature sensor (5) can be a thermocouple or a thermal resistor.

[0017] 6. Furthermore, through wind tunnel calibration and shock tube experiments, the calibration curves of total temperature and total pressure at different Mach numbers and different deflection angles are determined, and the temperature and pressure signals obtained from actual measurements are filtered and other data processing is performed to achieve simultaneous and accurate measurement of dynamic total temperature and total pressure at multiple points including blade inlet, outlet, and stage in the impeller machinery flow channel, thereby increasing the life of the temperature sensor and the airflow insensitive angle range, and improving the measurement spatial resolution and measurement accuracy.

[0018] The beneficial effects of the present invention are:

[0019] 1. Compared with the existing dynamic total temperature and total pressure devices, the present invention can accurately and simultaneously measure the multi-point dynamic total temperature and total pressure distribution along the blade height between blade rows, realize the measurement of larger incoming flow angles, and take into account the measurement of dynamic total temperature and total pressure in the boundary layer of the flow channel end wall.

[0020] 2. Compared with the existing dynamic temperature and pressure combination probe, the present invention arranges the total temperature measurement and the total pressure measurement back to back, and the dynamic temperature sensor is facing the pressure sensing hole, which can ensure the dynamic total temperature and total pressure measurement of the same streamline; it can reduce the size of the device head and improve the spatial resolution, and is suitable for simultaneous measurement of dynamic total temperature and total pressure in small gaps.

[0021] 3. Compared with the existing dynamic total pressure device, the total pressure hole of the present invention adopts a micro-loss and smooth structural design, which can reduce the total pressure loss and improve the measurement accuracy; there is no separation disturbance within a wider flow angle range, so that the dynamic pressure sensor can measure the true total pressure signal.

[0022] 4. The present invention utilizes a dynamic temperature sensor to correct and protect the dynamic pressure sensor to a certain extent, thereby eliminating the measurement error of the dynamic pressure sensor caused by temperature drift and preventing the actual temperature from exceeding the upper limit of the normal working temperature range of the dynamic pressure sensor.

[0023] 5. The dynamic temperature sensor faces away from the incoming airflow, which effectively reduces the scouring of the airflow on the dynamic temperature sensor and the impact of oil droplets, dust, etc. in the airflow on the dynamic temperature sensor, thereby increasing the service life of the dynamic temperature sensor; effectively reduces the head size and improves the spatial resolution; strengthens the convection heat exchange between the airflow and the dynamic temperature sensor, and the temperature recovery coefficient is high and stable within a larger deflection angle range. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an implementation example 1 of the present invention.

[0025] Figure 2 yes Figure 1 Right view of .

[0026] Among them: 1-device head, 2-device support rod, 3-pressure sensing hole, 4-dynamic pressure sensor, 5-dynamic temperature sensor, 6-insulating seal, 7-dynamic pressure sensor cable, 8-dynamic temperature sensor cable, 9-lead channel.

[0027] Figure 3 This is a schematic diagram of the implementation case 1 for measuring the flow field between compressor stages.

[0028] Figure 4 This is a schematic diagram of boundary layer measurement in implementation case 1.

[0029] Among them: 1-casing wall, 2-stator, 3-rotor, 4-stator, 5-hub wall, 6-device of the present invention, 7-boundary layer velocity type.

[0030] Figure 5 It is a structural schematic diagram of implementation case 2 of the present invention.

[0031] Among them: 1-device head, 2-device support rod, 3-pressure sensing hole, 4-dynamic pressure sensor, 5-dynamic temperature sensor, 6-insulating seal, 7-dynamic pressure sensor cable, 8-dynamic temperature sensor cable, 9-lead channel.

[0032] Figure 6 This is a schematic diagram of the second implementation case for measuring the flow field between turbine stages.

[0033] Wherein: 1-casing wall, 2-stator, 3-rotor, 4-stator, 5-hub wall, 6-device of the present invention. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0035] Embodiment 1:

[0036] For the measurement of the total temperature and total pressure distribution along the same blade height between compressor stages, the measurement space is narrow, the boundary layer is thin, the mainstream changes greatly along the blade height direction, but the speed is relatively low. In order to ensure spatial resolution, a smaller lateral size of the device head and the diameter of the pressure measuring hole should be selected. The temperature sensor can use a smaller bare wire thermocouple to ensure refined measurement and improve measurement accuracy. Therefore, the following implementation method can be adopted:

[0037] like Figures 1-2 FIG. 1 is a schematic diagram of a multi-point dynamic measurement device with total temperature and total pressure measurement points arranged in back-to-back directions, created by the present invention. Figure 3 is a schematic diagram of the device of the present invention used to measure the flow field between compressor stages, Figure 4 The present embodiment introduces a multi-point dynamic measurement device with total temperature and total pressure measurement points arranged in reverse, which is composed of a head (1), a support rod (2), a pressure sensing hole (3), a dynamic pressure sensor (4), a thermocouple (5), a heat-insulating seal (6), a dynamic pressure sensor cable (7), a dynamic temperature sensor cable (8), and a lead channel (9). The device is characterized in that: the head (1) is cylindrical, with 5 pressure sensing holes (3) at different axial positions on the surface, and a dynamic pressure sensor (4) is encapsulated inside, and the pressure sensing holes (3) are respectively oriented toward the expected incoming flow direction; the leeward side of the head (1) corresponding to each pressure sensing hole (3) is provided with an installation groove for installing a heat-insulating seal (6), and the thermocouple (5) is respectively fixed on the heat-insulating seal (6); the dynamic pressure sensor cable (7) and the dynamic temperature sensor cable (8) are led out from the tail end of the support rod (2) through the lead channel (9) through the head (1).

[0038] The head (1) has a diameter of 2 mm, the lead channel (7) is located at the center of the head (1) and has a diameter of 1 mm, and the outer diameter of the pressure sensing hole (3) is 1 mm and the inner diameter is 0.5 mm.

[0039] The pressure sensing holes (3) are distributed sparsely in the middle and densely at the two ends along the axis of the head (1); the center lines of the pressure sensing holes (3) closest to the two ends of the head (1) are half the outer diameter of the pressure sensing holes (3) at both end surfaces; the axial distance between the center lines of the first pressure sensing hole (3) and the second pressure sensing hole (3) near the end is 1 mm, and the axial distance between the center lines of the remaining two adjacent holes is 2 mm; the directions of the center lines of the holes are not the same.

[0040] The wall surface of the pressure sensing hole (3) is a smooth curve with slight loss: A portion of the curve is rotated and intersects with the cylindrical surface of the head (1), wherein the value of a is 0.5 mm, one end of the curve is tangent to the surface of the head (1), and the other end is perpendicular to the center line of the head (1), and the center line of the pressure sensing hole (3) is orthogonal to the center line of the head (1).

[0041] The thermocouple (5) protrudes from the wall of the head (1) by 0.1 mm.

[0042] The multi-point dynamic measurement device of the present invention, in which the total temperature and total pressure measurement points are arranged in reverse, can realize the simultaneous and accurate measurement of the dynamic total temperature and total pressure at multiple points between compressor stages. The specific method of use is as follows:

[0043] Step 1: In a calibrated wind tunnel with known Mach number and temperature, allow the incoming flow to flow over the head of the device;

[0044] Step 2: Measure the pressure of the dynamic pressure sensor on the windward side of the device and the temperature of the dynamic temperature sensor on the leeward side under different working conditions;

[0045] Step 3: Based on the calibration data, determine the calibration curves of total temperature and total pressure at different Mach numbers and different deflection angles through data processing.

[0046] Step 4: When in use, the device of the present invention is inserted into the measured flow field, and the pressure and temperature signals actually obtained by the measurement are filtered and other data processing is performed to achieve simultaneous and accurate measurement of the dynamic total temperature and total pressure at multiple points including the blade inlet, outlet and interstage in the impeller machine flow channel.

[0047] Embodiment 2:

[0048] For the measurement of total temperature and total pressure distribution along the same blade height between turbine stages, the mainstream velocity is relatively high. In order to ensure the strength of the measuring device, a larger lateral size of the device head and the diameter of the pressure measuring hole should be selected. The temperature sensor can use an armored thermal resistor to ensure refined measurement and improve strength. Therefore, the following implementation method can be adopted:

[0049] Figure 5 This is a structural schematic diagram of a second implementation example of the present invention. Figure 6The present invention is a schematic diagram of a device for measuring the flow field between turbine stages. This embodiment introduces a multi-point dynamic measurement device with total temperature and total pressure measurement points arranged in reverse, which is composed of a head (1), a support rod (2), a pressure sensing hole (3), a dynamic pressure sensor (4), an armored thermal resistor (5), a heat-insulating seal (6), a dynamic pressure sensor cable (7), a dynamic temperature sensor cable (8), and a lead-in channel (9). The device is characterized in that: the head (1) is cylindrical, with 7 pressure sensing holes (3) at different axial positions on the surface, and a dynamic pressure sensor (4) is encapsulated inside, and the pressure sensing holes (3) are respectively oriented toward the expected incoming flow direction; the leeward side of the head (1) corresponding to each pressure sensing hole (3) is provided with an installation groove for installing a heat-insulating seal (6), and the armored thermal resistor (5) is respectively fixed on the heat-insulating seal (6); the dynamic pressure sensor cable (7) and the dynamic temperature sensor cable (8) are led out from the tail end of the support rod (2) through the lead-in channel (9) through the head (1).

[0050] The head (1) has a diameter of 4 mm, the lead channel (7) is located at the center of the head (1) and has a diameter of 2 mm, and the pressure sensing hole (3) has an outer diameter of 2 mm and an inner diameter of 1 mm.

[0051] The pressure sensing holes (3) are distributed sparsely in the middle and densely at both ends along the axial direction of the head (1); the center lines of the pressure sensing holes (3) closest to the two ends of the head (1) are half the outer diameter of the pressure sensing holes (3) at both end surfaces; the axial distance between the center lines of the first pressure sensing hole (3) and the second pressure sensing hole (3) near the end is 2 mm, and the axial distance between the center lines of the remaining two adjacent holes is 4 mm; the directions of the center lines of the holes are not the same.

[0052] The wall surface of the pressure sensing hole (3) is a smooth curve with slight loss: A portion of the curve is rotated and intersects with the cylindrical surface of the head (1), wherein the value of a is 2 mm, one end of the curve is tangent to the surface of the head (1), and the other end is perpendicular to the center line of the head (1), and the center line of the pressure sensing hole (3) is orthogonal to the center line of the head (1).

[0053] The armored thermal resistor (5) protrudes from the wall surface of the device head (1) by 0.2 mm.

[0054] After wind tunnel calibration and shock tube experiments, the relationship between total temperature, total pressure, Mach number and incoming flow direction is obtained. The pressure and temperature signals obtained from actual measurements are filtered and other data processing is performed to achieve simultaneous and accurate measurement of multi-point dynamic total temperature and total pressure in the flow field between turbine stages.

[0055] Although the preferred embodiment has been described, various modifications or substitutions may be made to the embodiment without departing from the spirit and scope of the invention. Therefore, it should be understood that the present invention has been described in an illustrative manner rather than a restrictive manner.

Claims

1. A method for using a multi-point dynamic measurement device with total temperature and total pressure measuring points arranged in back-to-back order to achieve simultaneous and accurate measurement of the dynamic total temperature and total pressure at multiple points between compressor stages, wherein the multi-point dynamic measurement device with total temperature and total pressure measuring points arranged in back-to-back order comprises a head (1), a support rod (2), a pressure sensing hole (3), a dynamic pressure sensor (4), a dynamic temperature sensor (5), a heat-insulating seal (6), a dynamic pressure sensor cable (7), a dynamic temperature sensor cable (8), and a lead channel (9), and is characterized in that: The head (1) is cylindrical, and has a plurality of pressure sensing holes (3) at different axial positions on its surface, the directions of which are respectively oriented toward the expected incoming flow direction, and a dynamic pressure sensor (4) is installed at the bottom of the pressure sensing hole (3); a mounting groove for mounting a heat-insulating sealing member (6) is opened on the leeward side of the head (1) corresponding to each pressure sensing hole (3), and the dynamic temperature sensor (5) is fixed on the heat-insulating sealing member (6) respectively; the dynamic pressure sensor cable (7) and the dynamic temperature sensor cable (8) are led out from the tail end of the support rod (2) through the lead channel (9) through the head (1); The head (1) has a diameter of 1 mm to 6 mm, the lead channel (9) is located at the center of the head (1) and has a diameter of 1 / 4 to 1 / 2 of the diameter of the head (1), the outer diameter of the pressure sensing hole (3) is 1 / 5 to 1 / 2 of the diameter of the head (1), and the inner diameter is 0.2 mm to 2 mm, which is not larger than the outer diameter of the pressure sensing hole (3); The pressure sensing holes (3) are distributed sparsely in the middle and densely at the two ends along the axial direction of the head (1); the center lines of the pressure sensing holes (3) closest to the two ends of the head (1) are half the outer diameter of the pressure sensing holes (3) at both end surfaces; the axial distance between the center lines of the first pressure sensing hole (3) and the second pressure sensing hole (3) near the end is 1 to 4 mm; the axial distance between the center lines of the remaining two adjacent holes is 2 to 6 mm; and the directions of the center lines of the holes are not the same; The wall surface of the pressure sensing hole (3) is formed by rotating a part of a slight loss smooth curve: and intersecting with the cylindrical surface of the head (1), wherein the value of a is 1 to 4 times the inner diameter of the pressure sensing hole (3), one end of the curve is tangent to the surface of the head (1), and the other end is perpendicular to the center line of the head (1), and the center line of the pressure sensing hole (3) is orthogonal to the center line of the head (1); The dynamic temperature sensor (5) is located on the center line of the pressure sensing hole (3) and extends out of the wall of the head (1) by 0.2 mm to 1 mm. The dynamic temperature sensor (5) can be a thermocouple or a thermal resistor. The use steps are as follows: Step 1: in a calibrated wind tunnel with known incoming flow Mach number and temperature, allow the incoming flow to flow through the head of the device; Step 2: Measure the pressure of the dynamic pressure sensor on the windward side of the device and the temperature of the dynamic temperature sensor on the leeward side under different working conditions; The third step: determining the calibration curves of total temperature and total pressure at different Mach numbers and different deflection angles through data processing based on the data obtained by calibration; the fourth step: inserting the device of the present invention into the measured flow field when in use, filtering and other data processing are performed on the pressure and temperature signals obtained by actual measurement, so as to realize simultaneous and accurate measurement of dynamic total temperature and total pressure at multiple points including blade inlet, outlet and stage in the impeller machinery flow channel.

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