High-temperature water-cooling pressure measuring probe with wide angle measurement range

Abstract

The utility model belongs to the technical field of high-temperature flow field pressure testing, and particularly relates to a high-temperature water-cooling pressure measuring probe with a wide angle measurement range, which comprises a probe support rod, a probe head, a sleeve, a pressure guide pipe, a mounting seat, a cooling water inlet, a water outlet and a cooling water flow channel. The probe head is provided with seven pressure measuring holes, so that the deflection angle measuring range of the probe is effectively enlarged. A double-spiral flow channel design is adopted in the sleeve, and a C-shaped backflow structure is combined to form an efficient cooling water flow channel. Cooling water flows in through the water inlet, flows through the spiral flow channel and exchanges heat with the probe, so that the temperature of the probe support rod and the probe head can be effectively reduced, and the probe is ensured to stably and reliably work in a high-temperature environment. Through calibration, the probe can reliably measure the total pressure, the static pressure, the Mach number, the deflection angle, the pitch angle and the like in a flow field in a high-temperature environment (the highest temperature can reach 2000 DEG C), and in combination with a probe measurement range widening method, the measurement range of the deflection angle can reach-135 degrees to 135 degrees, and the measurement range of the pitch angle can reach-20 degrees to 50 degrees.

Description

Technical Field

[0001] This patent belongs to the technical field of high-temperature flow field pressure measurement, and specifically relates to a high-temperature water-cooled pressure probe with a wide-angle measurement range, which is applicable to measuring flow field parameters such as total pressure, static pressure, Mach number, deflection angle, pitch angle, etc. in high-temperature environments such as combustion chambers and turbines. The measurement range of the deflection angle can reach -135° to 135°, and the measurement range of the pitch angle can reach -20° to 50°, effectively broadening the measurement range of the probe deflection angle and ensuring the reliable and stable operation of the probe in high-temperature environments (up to 2300K). Background Art

[0002] The compressor, combustion chamber, and turbine are the three core components of an aeroengine. Tests are an important means to study the performance of turbines and combustion chambers. The airflow at the outlet of the combustion chamber and the inlet of the turbine not only has complex flow characteristics with strong three-dimensionality but also has the characteristics of high temperature (up to above 2000K) and high pressure (up to above 3.5MPa), which poses high requirements for the design of test probes in high-temperature environments such as combustion chambers and turbines.

[0003] Measuring the pressure field of combustion chambers and turbines is the main means to evaluate the pressure drop losses of each component. However, there are many difficulties in measuring the pressure field in high-temperature environments. One of the main challenges is that the pressure probe is required to have sufficient strength and reliability in harsh environments, that is, the probe is required to have an effective cooling structure and high precision. Currently, there are mainly two cooling methods for pressure probes in high-temperature environments: film cooling and water cooling. These two cooling methods each have their advantages, but there are also certain technical defects, which affect the performance and service life of the probe.

[0004] The advantage of film cooling is that it is relatively easy to adjust the temperature and flow rate of the cooling air flow according to the mainstream temperature and flow rate. However, this structure has certain defects in cooling the probe head: if film holes are opened at the probe head, the ejected cooling air flow will interfere with the flow field at the probe head, affecting the test accuracy. If no film holes are opened at the leading edge of the probe strut and only internal convective heat transfer is used for cooling, the cooling effect is insufficient and the probe head is easily burned out.

[0005] The advantage of water-cooled probes is that the flow of cooling water will not interfere with the flow field, and due to the specific heat capacity of water being much larger than that of air, the cooling effect is better. However, the complexity of the water-cooling system increases the difficulty of design and maintenance. It is difficult to quickly adjust the cooling water flow rate when the test state changes, which may cause local overheating or excessive pressure of the probe, increasing the risk of structural damage. At the same time, the existing flow channel structure design of water-cooled probes is not reasonable enough, with large internal resistance, insufficient contact between the cooling water and the probe strut, and problems such as dead water areas, resulting in an unsatisfactory cooling effect. And due to the small size of the probe, the operation of water-cooled probes is more difficult.

[0006] Another challenge is the limitation of the angle measurement range. In components such as combustion chambers, turbines, and even in variable cycle engines, the high-temperature airflow has strong three-dimensionality, with drastic changes in the flow direction and velocity vector. For example, in a variable cycle engine, due to the adjustment of adjustable guide vanes, the range of airflow deflection angle can reach -10° to 40°, while the angle measurement range of common five-hole pressure probes is around ±30°, or even smaller, making it difficult to meet the wide-angle range test requirements under complex flows. When facing such complex flow fields, existing probes often can only provide data within a limited angle, unable to comprehensively capture the true situation of the three-dimensional flow field, thus affecting the accuracy and comprehensiveness of flow field analysis.

[0007] The insufficiency of the angle measurement range will also lead to a reduction in the resolution of measurement data, affecting the capture and analysis of transient flow phenomena. Especially in flow fields with high turbulence or significant rotational effects, the probe needs to accurately measure the flow velocity and temperature in multiple directions to accurately characterize the nature of the flow field. Due to the limitation of the measurement angle range, researchers can only obtain local or incomplete data, affecting the comprehensive understanding and optimal design of the flow field.

[0008] Two invention patents with publication numbers CN107063560A and CN107131999A respectively proposed a high-temperature water-cooled dynamic pressure probe and a high-temperature water-cooled steady-state pressure probe; a utility model patent with publication number CN206930646U proposed a water-cooled probe. The angle measurement range of the above water-cooled probes is similar to that of conventional five-hole probes and cannot meet the wide-angle measurement requirements; in addition, the water-cooled structures of the above probes are all sleeve structures, and there may be problems with uneven heat transfer between the cooling water and the probe strut in different directions. Moreover, the above probes mainly cool the probe strut and do not cool the probe head, which may increase the risk of damage to the probe head and affect the accuracy of measurement data.

[0009] Therefore, there is an urgent need to develop a pressure probe with a wide angle measurement range, good cooling effects on both the probe strut and the probe head, and stable and reliable operation in a high-temperature environment to meet the pressure test requirements in high-temperature environments with complex airflow such as combustion chambers and turbines. Summary of the Invention

[0010] The purpose of this patent is to provide a pressure measurement method with a wide angle measurement range and high reliability for high-temperature and complex-flow airflows, which can cool both the probe strut and the probe head simultaneously, and can ensure low water flow resistance inside the probe, with ideal and uniform heat transfer effects.

[0011] The solution of this patent:

[0012] A high-temperature water-cooled pressure measurement probe with a wide-angle measurement range, comprising a probe rod (1), a probe head (2), a sleeve (3), a mounting seat (4), a positioning hole (5), a cooling water inlet pipe (6), a cooling water outlet pipe (7), a pressure guiding pipe (8), a spiral cooling water flow channel (9) and a C-shaped reflux structure (10), and a spiral heat sink (11). It is characterized in that: the probe head (2) is located at the top of the probe rod (1). There are seven pressure measurement holes on the surface of the probe head (2). The sleeve (3) is installed outside the probe rod (1), and a spiral heat sink (11) and a spiral cooling water flow channel (9) are provided between the two. The mounting seat (4) is installed on the sleeve (3), and a positioning hole (5) is provided on the mounting seat (4). The cooling water inlet pipe (6) and the outlet pipe (7) are installed on the sleeve (3) behind the mounting seat (4). The pressure guiding pipe (8) is installed inside the probe rod (1).

[0013] Furthermore, the outer diameter of the probe rod (1) is 2 mm to 8 mm, and the corresponding outer diameter of the sleeve (3) is 4 mm to 10 mm. The probe rod (1) and the sleeve (3) are connected into one body through the spiral heat sink (11).

[0014] Furthermore, the axial thickness of the spiral heat sink (11) is 0.5 to 1 mm, the radial height is 0.5 to 1 mm, and the pitch is 5 mm to 10 mm. It can not only serve as the support structure of the sleeve (3), but also increase the contact area between the sleeve and the cooling water to enhance the heat exchange effect.

[0015] Furthermore, the probe head (2) is provided with 7 pressure measurement holes, which are respectively communicated with 7 pressure guiding pipes. The diameters of the pressure measurement holes and the pressure guiding pipes are the same, which is 0.6 mm to 1.5 mm. Among them, the No. 1 pressure measurement hole (21) is communicated with the No. 1 pressure guiding pipe (81), the No. 2 pressure measurement hole (22) is communicated with the No. 2 pressure guiding pipe (82), the No. 3 pressure measurement hole (23) is communicated with the No. 3 pressure guiding pipe (83), the No. 4 pressure measurement hole (24) is communicated with the No. 4 pressure guiding pipe (84), the No. 5 pressure measurement hole (25) is communicated with the No. 5 pressure guiding pipe (85), and the above five pressure measurement holes are all located on the surface of the cylindrical part of the probe head (2) and in the same horizontal plane. The included angle between adjacent pressure measurement holes is 30° to 50°, and the maximum included angle between the No. 1 pressure measurement hole (21) and the No. 5 pressure measurement hole (25) is 180°; the No. 6 pressure measurement hole (26) is communicated with the No. 6 pressure guiding pipe (86), and the No. 7 pressure measurement hole (27) is communicated with the No. 7 pressure guiding pipe (87). The above two are located on the hemispherical surface and in another horizontal plane. The No. 6 pressure measurement hole (26) is located directly below the No. 2 pressure measurement hole (22) at a vertical distance of 3 to 5 times the diameter of the pressure measurement hole, and the No. 7 pressure measurement hole (27) is located directly below the No. 4 pressure measurement hole (24) at a vertical distance of 3 to 5 times the diameter of the pressure measurement hole.

[0016] Further, the probe head (2) includes a probe rod (1) and a cylindrical part at the top of the sleeve (3) with a length 3 to 5 times the diameter of the sleeve (3) and a hemispherical part at the end of the cylinder, and the diameter of the hemisphere is equal to the diameter of the sleeve (3).

[0017] Further, the curved surfaces where the 6th pressure measurement hole (26) and the 7th pressure measurement hole (27) are located at the probe head (2) are hemispherical surfaces or conical surfaces, and the angle of the cone apex angle is 30° to 60°.

[0018] Further, the mounting seat (4) is runway-shaped, the thickness of the mounting seat (4) is 2 mm to 5 mm, and two positioning holes (5) are opened on the mounting seat (4), and the diameter of the positioning holes (5) is 2 mm to 3 mm.

[0019] Further, the C-shaped reflux structure (10) is located at the top of the probe rod (1), and smoothly connects the cooling water inlet channel and the cooling water outlet channel in a tangent or approximately tangent manner to form a spiral cooling water flow channel (9).

[0020] Further, the width of the spiral cooling water flow channel (9) is 1.5 mm to 4 mm, the radial height is 0.5 mm to 2 mm, and the pitch is 5 mm to 10 mm.

[0021] Further, the method for broadening the angle measurement range of this patent is as follows: Taking the side hole 1st pressure measurement hole (21) and the non-side hole 2nd pressure measurement hole (22) as examples respectively to illustrate the specific zoning method. The measurement area centered on the 1st pressure measurement hole (21) is designated as Area 1, and the measurement area centered on the 2nd pressure measurement hole (22) is designated as Area 2. The division methods of other areas are the same as those of the above two holes. The calibration coefficient of Area 1 is defined as follows:

[0022]

[0023] The calibration coefficient of Area 2 is defined as follows:

[0024]

[0025] In the formula, C py is the deflection angle coefficient, C pp is the pitch angle coefficient, C pt is the total pressure coefficient, C ps is the static pressure coefficient, and the incoming flow total pressure and static pressure of the calibrated wind tunnel are p t and p s , p1, p2, p3 and p6 respectively correspond to the pressure values measured by the 1st pressure measurement hole (21), 2nd pressure measurement hole (22), 3rd pressure measurement hole (23) and 6th pressure measurement hole (26) of the seven-hole pressure probe. p p is the average value of the pressure values measured by the left hole, right hole, upper hole and lower hole.

[0026] The high-temperature water-cooled pressure measurement probe with a wide-angle measurement range of this patent has the following beneficial effects:

[0027] Beneficial effect 1: The probe head of this patent is provided with 7 pressure measurement holes. After calibration in a calibration wind tunnel, it can simultaneously measure airflow parameters such as total pressure, static pressure, Mach number, deflection angle, and pitch angle in the flow field. Combining with the method for broadening the measurement range of the probe, the measurement range of the probe deflection angle can be significantly increased to ±135°, that is, a range of 270° in the circumferential direction.

[0028] Beneficial effect 2: This patent adopts a spiral water-cooling water flow channel and a C-shaped reflux structure, so that the cooling water and the probe strut have a large effective heat exchange area, ensuring more sufficient and uniform heat exchange while effectively reducing the water flow resistance of the cooling water.

[0029] Beneficial effect 3: The high-temperature water-cooled pressure measurement probe of this patent can cool the probe strut and the probe head simultaneously, effectively preventing the probe head from being damaged due to excessive local temperature, and can ensure that the probe works reliably and stably in a high-temperature environment (up to 2300K) and ensure the accuracy of measurement data.

[0030] Beneficial effect 4: The high-temperature water-cooled pressure measurement probe of this patent is of an integrated design. Compared with the combined water-cooled probe, the structure of this patent is stable and reliable, with accurate positioning, and is suitable for popularization and use. Description of the Drawings

[0031] Figure 1 is the overall structural schematic diagram of a high-temperature water-cooled pressure measurement probe with a wide-angle measurement range in the embodiment of this patent.

[0032] Figure 2 is Figure 1 the partial enlarged front view and side view of the heads of two probes.

[0033] Figure 3 is Figure 1 the top view of

[0034] Figure 4 is Figure 1 the internal structural perspective view and the schematic diagram of the cooling water flow channel of the high-temperature water-cooled pressure measurement probe with the wide-angle measurement range shown, where the spiral lines represent the water flow paths and the arrows indicate the water flow direction.

[0035] Wherein: 1 - probe rod, 2 - probe head, 3 - sleeve, 4 - mounting base, 5 - positioning hole, 6 - cooling water inlet pipe, 7 - cooling water outlet pipe, 8 - pressure guiding pipe, 9 - spiral cooling water flow channel, 10 - C-shaped return channel, 11 - spiral heat sink, 21 - pressure measurement hole No. 1, 22 - pressure measurement hole No. 2, 23 - pressure measurement hole No. 3, 24 - pressure measurement hole No. 4, 25 - pressure measurement hole No. 5, 26 - pressure measurement hole No. 6, 27 - pressure measurement hole No. 7, 81 - pressure guiding pipe No. 1, 82 - pressure guiding pipe No. 2, 83 - pressure guiding pipe No. 3, 84 - pressure guiding pipe No. 4, 85 - pressure guiding pipe No. 5, 86 - pressure guiding pipe No. 6, 87 - pressure guiding pipe No. 7. Detailed implementation manners

[0036] The present patent will be elaborated in detail below in conjunction with the accompanying drawings and two specific implementation cases, so that the advantages and features of the present patent can be more easily understood by those skilled in the art, thereby making the protection scope of the present patent more clearly defined.

[0037] Embodiment 1:

[0038] Refer to Figure 1 、 Figure 3 、 Figure 4 and Figure 2 The hemispherical probe shown in is a high-temperature water-cooled pressure measurement probe with a wide-angle measurement range, which includes a probe rod (1), a probe head (2), a sleeve (3), a mounting base (4), a positioning hole (5), a cooling water inlet pipe (6), a cooling water outlet pipe (7), a pressure guiding pipe (8), a spiral cooling water flow channel (9) and a C-shaped return structure (10), and a spiral heat sink (11). Its characteristics are as follows: The probe head (2) is located at the top of the probe rod (1). There are seven pressure measurement holes on the surface of the probe head (2). The sleeve (3) is installed outside the probe rod (1), and a spiral heat sink (11) and a spiral cooling water flow channel (9) are provided between the two. The mounting base (4) is installed on the sleeve (3), and a positioning hole (5) is provided on the mounting base (4). The cooling water inlet pipe (6) and the outlet pipe (7) are installed on the sleeve (3) behind the mounting base (4). The pressure guiding pipe (8) is installed inside the probe rod (1).

[0039] In this embodiment, the outer diameter of the probe rod (1) is taken as 3 mm, and the outer diameter of the corresponding sleeve (3) is 5 mm. The probe rod (1) and the sleeve (3) are connected into one body through the spiral heat sink (11).

[0040] In this embodiment, the axial thickness of the spiral heat sink (11) is 0.5 mm, the radial height is 0.5 mm, and the pitch is 5 mm. It can not only serve as the support structure of the sleeve (3), but also increase the contact area between the sleeve and the cooling water to enhance the heat exchange effect.

[0041] In this embodiment, the probe head (2) is provided with 7 pressure measurement holes, which are respectively connected to 7 pressure guiding pipes. The pressure measurement holes and the pressure guiding pipes have the same diameter, which is 0.6 mm. Among them, the No. 1 pressure measurement hole (21) is connected to the No. 1 pressure guiding pipe (81), the No. 2 pressure measurement hole (22) is connected to the No. 2 pressure guiding pipe (82), the No. 3 pressure measurement hole (23) is connected to the No. 3 pressure guiding pipe (83), the No. 4 pressure measurement hole (24) is connected to the No. 4 pressure guiding pipe (84), the No. 5 pressure measurement hole (25) is connected to the No. 5 pressure guiding pipe (85), and the above five pressure measurement holes are all located on the surface of the cylindrical part of the probe head (2) and are in the same horizontal plane. The included angle between adjacent pressure measurement holes is 45°, and the included angle between the No. 1 pressure measurement hole (21) and the No. 5 pressure measurement hole (25) is 180°; the No. 6 pressure measurement hole (26) is connected to the No. 6 pressure guiding pipe (86), and the No. 7 pressure measurement hole (27) is connected to the No. 7 pressure guiding pipe (87). The above two are located on the hemispherical surface and are in another horizontal plane. The No. 6 pressure measurement hole (26) is located directly below the No. 2 pressure measurement hole (22) at a vertical distance of 3 times the diameter of the pressure measurement hole, and the No. 7 pressure measurement hole (27) is located directly below the No. 4 pressure measurement hole (24) at a vertical distance of 3 times the diameter of the pressure measurement hole.

[0042] The probe head (2) includes a probe support rod (1) and the top of the sleeve (3), which is a cylindrical part with a length 3 times the diameter of the sleeve (3) and a hemispherical part at the end of the cylinder. The diameter of the hemisphere is equal to the diameter of the sleeve (3).

[0043] In this embodiment, the surface where the No. 6 pressure measurement hole (26) and the No. 7 pressure measurement hole (27) are located at the probe head (2) is determined as a hemispherical surface.

[0044] In this embodiment, the mounting seat (4) is runway-shaped, with a thickness of 2 mm. Two positioning holes (5) are opened on the mounting seat (4), and the diameter of the positioning holes (5) is 2 mm.

[0045] The C-shaped reflux structure (10) is located at the top of the probe support rod (1), and smoothly connects the cooling water inlet channel and the cooling water outlet channel in an approximately tangent manner to form a spiral cooling water flow channel (9).

[0046] The width of the spiral cooling water flow channel (9) is 2 mm, the radial height is 0.5 mm, and the pitch is 5 mm.

[0047] In the embodiment of this patent, the high-temperature water-cooled pressure measurement probe with a wide-angle measurement range, after being calibrated in a calibration wind tunnel and combined with the following zoning method, can obtain different pneumatic calibration coefficients corresponding to different air flow velocities within the deflection angle range of ±135° and the pitch angle range of -20° to 50°; when actually measuring the high-temperature flow field, the total pressure, static pressure, Mach number, deflection angle, pitch angle and other parameters of the incoming flow can be calculated by using the measurement data of the probe combined with the pneumatic calibration coefficients. The zoning method is as follows:

[0048] Taking the side hole pressure measurement hole No. 1 (21) and the non-side hole pressure measurement hole No. 2 (22) as examples respectively, the specific zoning method is described as follows. The measurement area centered on the pressure measurement hole No. 1 (21) is designated as Zone 1, and the measurement area centered on the pressure measurement hole No. 2 (22) is designated as Zone 2. The division of other areas is similar to that of the above two holes. The calibration coefficient of Zone 1 is defined as follows:

[0049]

[0050] The calibration coefficient of Zone 2 is defined as follows:

[0051]

[0052] In the formula, C py is the deflection angle coefficient, C pp is the pitch angle coefficient, C pt is the total pressure coefficient, C ps is the static pressure coefficient. The total incoming flow pressure and static pressure of the calibration wind tunnel are p t and p s , respectively. p1, p2, p3, and p6 correspond to the pressure values measured by the pressure measurement holes No. 1 (21), No. 2 (22), No. 3 (23), and No. 6 (26) of the seven-hole pressure probe respectively. p p is the average value of the pressure values measured by the left hole, right hole, upper hole, and lower hole.

[0053] In this patent, by combining the actual high-temperature flow field temperature range to select appropriate structural parameters and combining the method of broadening the probe measurement range, the deflection angle measurement range can reach ±135°; through the water-cooling structure design combining the spiral flow channel and the C-shaped reflux structure, the probe strut and the probe head can be cooled simultaneously, and the heat dissipation effect can be ensured to be uniform and ideal, enabling the probe to work stably in a high-temperature environment (up to 2300K).

[0054] Example 2:

[0055] See Figure 3 、 Figure 4 、 Figure 1 for the main structure and Figure 2The conical probe shown in the figure is a high-temperature water-cooled pressure measurement probe with a wide-angle measurement range, which consists of a probe rod (1), a probe head (2), a sleeve (3), a mounting seat (4), a positioning hole (5), a cooling water inlet pipe (6), a cooling water outlet pipe (7), a pressure guiding pipe (8), a spiral cooling water flow channel (9) and a C-shaped reflux structure (10), and a spiral heat sink (11). It is characterized in that: the probe head (2) is located at the top of the probe rod (1), and there are seven pressure measurement holes on the surface of the probe head (2). The sleeve (3) is installed outside the probe rod (1), and a spiral heat sink (11) and a spiral cooling water flow channel (9) are arranged between them. The mounting seat (4) is installed on the sleeve (3), and a positioning hole (5) is arranged on the mounting seat (4). The cooling water inlet pipe (6) and the outlet pipe (7) are installed on the sleeve (3) behind the mounting seat (4), and the pressure guiding pipe (8) is installed inside the probe rod (1).

[0056] In this embodiment, the outer diameter of the probe rod (1) is taken as 3 mm, and the corresponding outer diameter of the sleeve (3) is 7 mm. The probe rod (1) and the sleeve (3) are connected into one body through the spiral heat sink (11).

[0057] In this embodiment, the axial thickness of the spiral heat sink (11) is 0.5 mm, the radial height is 1 mm, and the pitch is 6 mm. It can not only serve as the support structure of the sleeve (3), but also increase the contact area between the sleeve and the cooling water to enhance the heat exchange effect.

[0058] In this embodiment, the probe head (2) is provided with 7 pressure measurement holes, which are respectively communicated with 7 pressure guiding pipes. The diameters of the pressure measurement holes and the pressure guiding pipes are the same, taking 0.6 mm. Among them, the No. 1 pressure measurement hole (21) is communicated with the No. 1 pressure guiding pipe (81), the No. 2 pressure measurement hole (22) is communicated with the No. 2 pressure guiding pipe (82), the No. 3 pressure measurement hole (23) is communicated with the No. 3 pressure guiding pipe (83), the No. 4 pressure measurement hole (24) is communicated with the No. 4 pressure guiding pipe (84), the No. 5 pressure measurement hole (25) is communicated with the No. 5 pressure guiding pipe (85), and the above five pressure measurement holes are all located on the surface of the cylindrical part of the probe head (2) and in the same horizontal plane. The included angle between adjacent pressure measurement holes is taken as 40°, and the included angle between the No. 1 pressure measurement hole (21) and the No. 5 pressure measurement hole (25) is 160°; the No. 6 pressure measurement hole (26) is communicated with the No. 6 pressure guiding pipe (86), and the No. 7 pressure measurement hole (27) is communicated with the No. 7 pressure guiding pipe (87). The above two are located on the conical surface and in another horizontal plane. The No. 6 pressure measurement hole (26) is located directly below the No. 2 pressure measurement hole (22) at a vertical distance of 3 times the diameter of the pressure measurement hole, and the No. 7 pressure measurement hole (27) is located directly below the No. 4 pressure measurement hole (24) at a vertical distance of 3 times the diameter of the pressure measurement hole.

[0059] The probe head (2) includes a probe rod (1) and a cylindrical part at the top of the sleeve (3) that is 3 times the diameter of the sleeve (3) and a conical part at the end of the cylinder. The diameter of the cone is equal to the diameter of the sleeve (3).

[0060] In this embodiment, the curved surface where the 6th pressure measurement hole (26) and the 7th pressure measurement hole (27) are located at the probe head (2) is determined as a conical curved surface.

[0061] In this embodiment, the mounting seat (4) is runway-shaped with a thickness of 3 mm. Two positioning holes (5) are opened on the mounting seat (4), and the diameter of the positioning holes (5) is 2 mm.

[0062] The C-shaped reflux structure (10) is located at the top of the probe rod (1), and smoothly connects the cooling water inlet channel and the cooling water outlet channel in an approximately tangent manner to form a spiral cooling water flow channel (9).

[0063] The width of the spiral cooling water flow channel (9) is 2.5 mm, the radial height is 1 mm, and the pitch is 6 mm.

[0064] For the high-temperature water-cooled pressure measurement probe with a wide-angle measurement range introduced in this patent embodiment, after calibration in a calibration wind tunnel and combined with the following zoning method, different aerodynamic calibration coefficients corresponding to different air flow velocities can be obtained within the yaw angle range of ±135° and the pitch angle range of -20° to 50°; when actually measuring the high-temperature flow field, the total pressure, static pressure, Mach number, yaw angle, pitch angle and other parameters of the incoming flow can be calculated by using the measurement data of the probe combined with the aerodynamic calibration coefficients. The zoning method is as follows:

[0065] Taking the side hole 1st pressure measurement hole (21) and the non-side hole 2nd pressure measurement hole (22) as examples respectively to illustrate the specific zoning method. The measurement area centered on the 1st pressure measurement hole (21) is designated as Area 1, and the measurement area centered on the 2nd pressure measurement hole (22) is designated as Area 2. The division of other areas is similar to the above two holes. The calibration coefficients of Area 1 are defined as follows:

[0066]

[0067] The calibration coefficients of Area 2 are defined as follows:

[0068]

[0069] In the formula, C py is the yaw angle coefficient, C pp is the pitch angle coefficient, C pt is the total pressure coefficient, C ps is the static pressure coefficient. The total pressure and static pressure of the incoming flow in the calibration wind tunnel are p t and p s, p1, p2, p3, and p6 respectively correspond to the pressure values measured by the 1st pressure measurement hole (21), 2nd pressure measurement hole (22), 3rd pressure measurement hole (23), and 6th pressure measurement hole (26) of the seven-hole pressure probe. p p is the average of the pressure values measured by the left hole, right hole, upper hole, and lower hole.

[0070] By selecting appropriate structural parameters in combination with the actual high-temperature flow field temperature range and combining the method of broadening the probe measurement range, the deflection angle measurement range can reach ±135° in this patent; through the water-cooling structure design that combines a spiral flow channel and a C-shaped reflux structure, the probe strut and the probe head can be cooled simultaneously, and the heat dissipation effect can be ensured to be uniform and ideal, enabling the probe to work stably in a high-temperature environment (up to 2300K).

Claims

1. A high-temperature water-cooled pressure probe with a wide-angle measurement range, comprising a probe support rod (1), a probe head (2), a sleeve (3), a mounting seat (4), a positioning hole (5), a cooling water inlet pipe (6), a cooling water outlet pipe (7), a pressure-guiding pipe (8), a spiral cooling water flow channel (9), a C-shaped reflux structure (10), and a spiral heat sink (11), characterized in that: The probe head (2) is located at the top of the probe support rod (1), and the surface of the probe head (2) is provided with seven pressure measuring holes. The sleeve (3) is installed on the outside of the probe support rod (1), and a spiral heat sink (11) and a spiral cooling water flow channel (9) are provided between the two. The mounting seat (4) is installed on the sleeve (3), and the mounting seat (4) is provided with a positioning hole (5). The cooling water inlet pipe (6) and the outlet pipe (7) are installed on the sleeve (3) and behind the mounting seat (4), and the pressure guide pipe (8) is installed in the probe support rod (1); The outer diameter of the probe support rod (1) is 2 mm to 8 mm, and the outer diameter of the corresponding sleeve (3) is 4 mm to 10 mm. The probe support rod (1) and the sleeve (3) are connected as a whole via a spiral heat sink (11); The spiral heat sink (11) has an axial thickness of 0.5 to 1 mm, a radial height of 0.5 to 1 mm, and a pitch of 5 to 10 mm. It can not only serve as a supporting structure for the sleeve (3), but also increase the contact area between the sleeve and the cooling water to enhance the heat exchange effect. The probe head (2) is provided with 7 pressure measuring holes, which are respectively connected to 7 pressure pipes. The pressure measuring holes and the pressure pipes have the same diameter, which is 0.6 mm to 1.5 mm. The pressure measuring hole No. 1 (21) is connected to the pressure pipe No. 1 (81), the pressure measuring hole No. 2 (22) is connected to the pressure pipe No. 2 (82), the pressure measuring hole No. 3 (23) is connected to the pressure pipe No. 3 (83), the pressure measuring hole No. 4 (24) is connected to the pressure pipe No. 4 (84), and the pressure measuring hole No. 5 (25) is connected to the pressure pipe No. 5 (85). The above five pressure measuring holes are all located on the surface of the cylindrical part of the probe head (2) and are on the same horizontal plane. The angle between adjacent pressure measuring holes is 30° to 50°, and the maximum angle between the No. 1 pressure measuring hole (21) and the No. 5 pressure measuring hole (25) is 180°; the No. 6 pressure measuring hole (26) is connected to the No. 6 pressure guide pipe (86), and the No. 7 pressure measuring hole (27) is connected to the No. 7 pressure guide pipe (87), and the above two are located on the hemispherical surface and in another horizontal plane, and the No. 6 pressure measuring hole (26) is located at a vertical distance of 3 to 5 times the diameter of the pressure measuring hole directly below the No. 2 pressure measuring hole (22), and the No. 7 pressure measuring hole (27) is located at a vertical distance of 3 to 5 times the diameter of the pressure measuring hole directly below the No. 4 pressure measuring hole (24); The probe head (2) comprises a probe support rod (1) and a cylindrical portion at the top of the sleeve (3) which is 3 to 5 times longer than the diameter of the sleeve (3) and a hemispherical portion at the end of the cylindrical portion, wherein the diameter of the hemispherical portion is equal to the diameter of the sleeve (3); The curved surface where the No. 6 pressure measuring hole (26) and the No. 7 pressure measuring hole (27) of the probe head (2) are located is a hemispherical curved surface or a conical curved surface, and the angle of the cone vertex is 30° to 60°; The mounting seat (4) is in the shape of a racetrack, the thickness of the mounting seat (4) is 2 mm to 5 mm, two positioning holes (5) are formed on the mounting seat (4), and the diameter of the positioning holes (5) is 2 mm to 3 mm; The C-shaped reflux structure (10) is located at the top of the probe support rod (1), and smoothly connects the cooling water inlet channel and the cooling water outlet channel in a tangent or approximately tangent manner to form a spiral cooling water flow channel (9); The spiral cooling water flow channel (9) has a width of 1.5 mm to 4 mm, a radial height of 0.5 mm to 2 mm, and a pitch of 5 mm to 10 mm.

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