A transonic continuous wall pressure measurement device for a wind tunnel

Abstract

The application discloses a transonic continuous wind tunnel wall pressure measuring device, which comprises a base mechanism, a cover plate mechanism and a pressure measuring hole assembly. The base mechanism is installed on the upper and lower hole walls of the wind tunnel through fasteners. The cover plate mechanism is detachably connected to one end of the base mechanism away from the wind tunnel through a connecting assembly. The pressure measuring hole assembly is provided with a plurality of pressure measuring holes. The pressure measuring holes are arranged through the base mechanism and the cover plate mechanism, and a pressure measuring tube is arranged in the pressure measuring hole assembly. The bottom of the pressure measuring tube penetrates through the base mechanism and passes out along the inclined holes on the upper and lower hole walls of the wind tunnel. The pressure measuring tube is connected with a pressure scanning valve. The axis of the pressure measuring hole assembly is perpendicular to the upper and lower hole walls of the wind tunnel and the bottom end face of the base mechanism. The application has good applicability, can effectively improve the accuracy of the wind tunnel wall pressure measurement, reduces the interference on the wind tunnel flow field, and ensures the good quality of the wind tunnel flow field.

Description

Technical Field

[0001] This invention relates to the field of wind tunnel testing technology, and in particular to a transonic continuous wind tunnel wall pressure measurement device. Background Technology

[0002] Transonic wind tunnel test sections employ permeable walls with openings and slots. The interaction between the permeable flow and the wall boundary layer leads to exceptionally complex near-wall flow, impacting not only wind tunnel design, commissioning, and operation, but also significantly affecting the quality of test data. This influences the magnitude of wall interference in the raw data, as well as the evaluation and correction of test data, making it an unavoidable problem for transonic wind tunnel testers. The wall pressure information method, used to correct wall interference in high-speed wind tunnel model tests, does not involve the ventilation characteristics of the wind tunnel walls and can be applied to various permeable or solid-wall high-speed wind tunnels. In recent years, with increasing demands for accuracy in wind tunnel test data and advancements in measurement and computational technologies, research on wind tunnel wall interference has made significant progress.

[0003] In practical applications, transonic wind tunnels exhibit high flow velocities and complex flow field structures during model tests, with shock waves and vortices being common, and the upper and lower walls significantly interfering with the flow field around the model. Transonic continuous wind tunnels require high-quality flow fields and are highly sensitive to the installation of the test section model and wall pressure measurement devices. Improper handling can severely affect the flow field quality of the wind tunnel, introducing additional errors into the test results. Therefore, there is an urgent need for a wall pressure measurement device that can accurately measure wind tunnel wall pressure while minimizing interference with the wind tunnel flow field. Summary of the Invention

[0004] The purpose of this invention is to provide a transonic continuous wind tunnel wall pressure measurement device, which aims to solve or improve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a transonic continuous wind tunnel wall pressure measurement device, comprising:

[0006] A base mechanism, which is mounted on the upper and lower bore walls of the wind tunnel by fasteners;

[0007] A cover plate mechanism, wherein the cover plate mechanism is detachably connected to the end of the base mechanism away from the wind tunnel via a connecting assembly;

[0008] A pressure testing hole assembly is provided, wherein a plurality of pressure testing hole assemblies are provided; the plurality of pressure testing hole assemblies are provided through the base mechanism and the cover plate mechanism, and a pressure testing tube is installed in the pressure testing hole assembly. The bottom of the pressure testing tube passes through the base mechanism and exits through the oblique holes on the upper and lower holes of the wind tunnel. The pressure testing tube is connected to a pressure scanning valve.

[0009] The axis of the pressure measuring hole assembly is perpendicular to the upper and lower hole walls of the wind tunnel and the bottom end face of the base mechanism.

[0010] Preferably, the pressure measuring hole assembly includes a first pressure measuring hole, a second pressure measuring hole, and an elongated hole;

[0011] A plurality of first pressure measuring holes are formed on the top surface of the cover plate mechanism, and a plurality of second pressure measuring holes are formed on the bottom surface of the cover plate mechanism; the first pressure measuring holes and the second pressure measuring holes are connected; a plurality of elongated holes are formed through the base mechanism, and the elongated holes are located directly below the first pressure measuring holes and the second pressure measuring holes; the axis of the first pressure measuring hole, the axis of the second pressure measuring hole, and the axis of the elongated holes are all perpendicular to the upper and lower hole walls of the wind tunnel and the bottom end face of the base mechanism;

[0012] The pressure measuring tube is fixedly installed inside the first pressure measuring hole assembly, and the bottom of the pressure measuring tube passes through the second pressure measuring hole and extends out of the elongated hole.

[0013] Preferably, the base mechanism includes a base, and a connecting wing plate is circumferentially fixed to the bottom of the outer side wall of the base; the base is provided with a plurality of elongated holes, and the axis of the elongated holes is perpendicular to the bottom end face of the base.

[0014] The connecting wing plate is mounted on the upper and lower bore walls of the wind tunnel by the fasteners; the cover plate mechanism is detachably connected to the top of the base by the connecting assembly.

[0015] Preferably, the outer side wall of the base has a mounting groove circumferentially formed at the top.

[0016] The cover plate mechanism includes a cover plate body, and a plurality of first pressure measuring holes and a plurality of second pressure measuring holes are respectively opened on the top surface and the bottom surface of the cover plate body; a slot is opened on the bottom surface of the cover plate body to engage with the mounting groove, and the slot communicates with the second pressure measuring holes.

[0017] The connecting component penetrates the outer side wall of the cover plate body and extends into the base. The connecting component is detachably connected to both the cover plate body and the base.

[0018] Preferably, the connecting assembly includes a plurality of first screws; a plurality of first threaded through holes are provided on the bottom of the outer wall of the cover plate body, and the first threaded through holes communicate with the slot; a plurality of second threaded through holes are provided on the groove wall of the mounting groove, the second threaded through holes communicate with the elongated hole, and the second threaded through holes correspond one-to-one with the first threaded through holes; the first screw passes through the first threaded through hole and extends into the second threaded through hole, and the first screw is threadedly connected to both the first threaded through hole and the second threaded through hole.

[0019] Preferably, the connecting wing plate has a plurality of countersunk holes, and the fastener includes a plurality of second screws, which pass through the countersunk holes and are threadedly connected to the upper and lower hole walls of the wind tunnel.

[0020] Preferably, the opposite ends of the base and the cover plate body are both provided with spherical leading edges.

[0021] Preferably, the distance between the bottom surface of the base and the top surface of the cover plate body is not less than the thickness of the upper and lower wall surface layers of the wind tunnel.

[0022] Preferably, the diameter of the first pressure measuring hole is not greater than 1.2 mm; and the spacing between the plurality of first pressure measuring holes is not less than 3 mm.

[0023] Preferably, the pressure measuring tube is numbered.

[0024] The present invention discloses the following technical effects:

[0025] The base mechanism of this invention is installed on the upper and lower bore walls of the wind tunnel by fasteners, which is simple, reliable and easy to install; the pressure scanning valve connected by the pressure measuring tube accurately measures the pressure near the upper and lower inclined bore walls of the wind tunnel, reducing interference with the flow field quality and ensuring good wind tunnel flow field quality.

[0026] The pressure measuring hole assembly of the present invention is formed through the base mechanism and the cover plate mechanism, and the pressure measuring tube is installed in the pressure measuring hole assembly, which effectively reduces the mutual interference of pressure measuring holes and the interference of wind tunnel hole wall flow on the pressure measuring holes. It has good applicability to 0.6m-level transonic continuous inclined hole wall wind tunnels. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is the front view of the present invention;

[0029] Figure 2 This is a top view of the present invention;

[0030] Figure 3 This is a left-side cross-sectional view of the present invention;

[0031] Figure 4 This is a top view of the cover plate mechanism in this invention;

[0032] Figure 5 This is a left sectional view of the cover plate mechanism in this invention;

[0033] Figure 6 This is a left sectional view of the base mechanism in this invention;

[0034] Among them, 1. pressure measuring tube; 2. first pressure measuring hole; 3. second pressure measuring hole; 4. elongated hole; 5. base; 6. connecting wing plate; 7. mounting groove; 8. cover plate body; 9. slot; 10. first screw; 11. first threaded through hole; 12. second threaded through hole; 13. countersunk hole; 14. second screw; 15. spherical leading edge; 16. pressure scanning valve. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figure 1-6 This invention provides a transonic continuous wind tunnel wall pressure measurement device, comprising:

[0038] The base mechanism is installed on the upper and lower bore walls of the wind tunnel by fasteners;

[0039] The cover plate mechanism is detachably connected to the end of the base mechanism away from the wind tunnel via a connecting component; the flatness of the contact surface between the cover plate mechanism and the base mechanism is within 0.02mm to reduce interference with the flow field; the external dimensions of the base mechanism and the cover plate mechanism are designed to fully consider the flow characteristics near the upper and lower inclined hole walls of the wind tunnel, ensuring that the pressure measuring hole on the wall pressure measuring device avoids the strong non-uniform flow zone near the vent.

[0040] The pressure testing hole assembly comprises several pressure testing hole assemblies. These pressure testing hole assemblies are perforated in the base mechanism and the cover plate mechanism, and pressure testing tubes 1 are installed inside the pressure testing hole assemblies. The pressure testing tubes 1 are bonded to the pressure testing hole assemblies with 502 glue. The bottom of the pressure testing tubes 1 passes through the base mechanism and exits through the oblique holes on the upper and lower walls of the wind tunnel. The pressure testing tubes 1 are connected to pressure scanning valves 16. All pressure testing tubes 1 are connected to pressure scanning valves 16. Before installation, the pressure testing tubes 1 are ventilated and airtight. The airtightness test pressure is not less than 0.3MPa. The pressure testing tubes 1 extend from inside the device to the bottom of the base mechanism. The end of the pressure testing tubes 1 is flush with the surface of the bottom machined plane of the base mechanism, without chamfering or burrs.

[0041] The axis of the pressure measuring hole assembly is perpendicular to the upper and lower hole walls of the wind tunnel and the bottom end face of the base mechanism.

[0042] With this configuration, the base mechanism is installed on the upper and lower borehole walls of the wind tunnel using fasteners, making the installation simple, reliable, and easy. The pressure scanning valve 16 connected to the pressure measuring tube 1 accurately measures the pressure near the upper and lower inclined borehole walls of the wind tunnel, reducing interference with the flow field quality and ensuring good wind tunnel flow field quality. The pressure measuring hole assembly is perforated in both the base mechanism and the cover plate mechanism, and the pressure measuring tube 1 is installed inside the pressure measuring hole assembly, effectively reducing mutual interference between pressure measuring holes and interference from the flow on the wind tunnel borehole walls. This configuration is highly suitable for continuous inclined borehole wind tunnels with transonic speeds in the 0.6m range.

[0043] The design is further optimized so that the pressure measuring hole assembly includes a first pressure measuring hole 2, a second pressure measuring hole 3, and an elongated hole 4; the pressure measuring tubes 1 are evenly distributed in the elongated hole 4;

[0044] Several first pressure measuring holes 2 are opened on the top surface of the cover plate mechanism, and several second pressure measuring holes 3 are opened on the bottom surface of the cover plate mechanism; the first pressure measuring holes 2 and the second pressure measuring holes 3 are connected; several elongated holes 4 are opened through the base mechanism, and the elongated holes 4 are located directly below the first pressure measuring holes 2 and the second pressure measuring holes 3; the axis of the first pressure measuring hole 2, the axis of the second pressure measuring hole 3, and the axis of the elongated holes 4 are all perpendicular to the upper and lower hole walls of the wind tunnel and the bottom end face of the base mechanism.

[0045] The pressure measuring tube 1 is fixedly installed in the first pressure measuring hole 2. The bottom of the pressure measuring tube 1 passes through the second pressure measuring hole 3 and extends out to the outside of the elongated hole 4. The pressure measuring tube 1 extends out to the elongated hole 4 and extends out along the inclined holes on the upper and lower walls of the wind tunnel. The length of the pressure measuring tube 1 extending out of the elongated hole 4 is 150mm. The connection between the outer wall outlet of the pressure measuring tube 1 and the bottom surface of the base mechanism is not chamfered and is burr-free.

[0046] Further optimization of the scheme: the base mechanism includes a base 5, and a connecting wing plate 6 is circumferentially fixed to the bottom of the outer side wall of the base 5; the base 5 is provided with a number of elongated holes 4, and the axis of the elongated holes 4 is set perpendicular to the bottom end face of the base 5.

[0047] The connecting wing plate 6 is installed on the upper and lower bore walls of the wind tunnel by fasteners; the cover plate mechanism is detachably connected to the top of the base 5 by connecting components.

[0048] The design has been further optimized by providing a mounting groove 7 on the top circumferential side of the outer wall of the base 5.

[0049] The cover plate mechanism includes a cover plate body 8, and a plurality of first pressure measuring holes 2 and a plurality of second pressure measuring holes 3 are respectively opened on the top and bottom surfaces of the cover plate body 8; a slot 9 is opened on the bottom surface of the cover plate body 8 to engage with the mounting groove 7, and the slot 9 communicates with the second pressure measuring holes 3.

[0050] The connecting component penetrates the outer wall of the cover plate body 8 and extends into the base 5. The connecting component can be detachably connected to both the cover plate body 8 and the base 5.

[0051] The scheme is further optimized. The connecting components include several first screws 10; several first threaded through holes 11 are opened on the bottom of the outer wall of the cover plate body 8, and the first threaded through holes 11 are connected to the slot 9; several second threaded through holes 12 are opened on the groove wall of the mounting groove 7, and the second threaded through holes 12 are connected to the elongated hole 4, and the second threaded through holes 12 and the first threaded through holes 11 are set in a one-to-one correspondence; the first screws 10 pass through the first threaded through holes 11 and extend into the second threaded through holes 12, and the first screws 10 are threadedly connected to the first threaded through holes 11 and the second threaded through holes 12.

[0052] The scheme is further optimized by providing several countersunk holes 13 on the connecting wing plate 6. The fasteners include several second screws 14, which pass through the countersunk holes 13 and are threaded to the upper and lower walls of the wind tunnel. The pressure measuring tube 1 passes through the device through the elongated hole 4 and through the 60° inclined holes on the upper and lower walls of the wind tunnel to exit the wind tunnel test section and connect to the pressure scanning valve 16. This installation method can achieve rapid installation and disassembly of the wall pressure measuring device with minimal changes to the wind tunnel wall, while ensuring convenient and reliable installation positioning.

[0053] The design was further optimized by setting a spherical leading edge 15 at the opposite end of the base 5 and the cover plate body 8. The spherical leading edge 15 is located at the position where the axial pressure gradient of the wind tunnel is 0, thereby minimizing its interference with the flow field and ensuring the flow field quality of the wind tunnel itself.

[0054] The straightness deviation of the spherical leading edge 15 of the base 5 is no greater than 0.02mm, and the straightness deviation of the trailing edge of the base 5 away from the spherical leading edge 15 is no greater than 0.05mm, so as to achieve accurate positioning of the measurement position.

[0055] Further optimization of the scheme: the distance between the bottom surface of the base 5 and the top surface of the cover plate body 8 is not less than the thickness of the upper and lower wall boundary layers of the wind tunnel, thereby eliminating the complex flow interference of the upper and lower wall boundary layers of the wind tunnel.

[0056] Further optimize the scheme by verifying the mutual interference of pressure measuring holes and determining the number and spacing of pressure measuring hole components; the diameter of the first pressure measuring hole 2 is not greater than 1.2mm; and the spacing between several first pressure measuring holes 2 is not less than 3mm.

[0057] To further optimize the design, pressure measuring tube 1 is numbered to facilitate marking of several pressure measuring tubes 1.

[0058] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0059] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A transonic continuous wind tunnel wall pressure measuring device, characterized in that, include: A base mechanism, which is mounted on the upper and lower bore walls of the wind tunnel by fasteners; A cover plate mechanism, wherein the cover plate mechanism is detachably connected to the end of the base mechanism away from the wind tunnel via a connecting assembly; A pressure measuring hole assembly is provided, wherein a plurality of pressure measuring hole assemblies are provided; the plurality of pressure measuring hole assemblies are provided through the base mechanism and the cover plate mechanism, and a pressure measuring tube (1) is installed in the pressure measuring hole assembly. The bottom of the pressure measuring tube (1) passes through the base mechanism and exits through the inclined holes on the upper and lower holes of the wind tunnel. The pressure measuring tube (1) is connected to a pressure scanning valve (16). The axis of the pressure measuring hole assembly is perpendicular to the upper and lower hole walls of the wind tunnel and the bottom end face of the base mechanism.

2. The transonic continuous wind tunnel wall pressure measurement device of claim 1, wherein: The pressure measuring hole assembly includes a first pressure measuring hole (2), a second pressure measuring hole (3), and an elongated hole (4); A plurality of first pressure measuring holes (2) are formed on the top surface of the cover plate mechanism, and a plurality of second pressure measuring holes (3) are formed on the bottom surface of the cover plate mechanism; the first pressure measuring holes (2) and the second pressure measuring holes (3) are connected; a plurality of elongated holes (4) are formed through the base mechanism, and the elongated holes (4) are located directly below the first pressure measuring holes (2) and the second pressure measuring holes (3); the axis of the first pressure measuring hole (2), the axis of the second pressure measuring hole (3), and the axis of the elongated holes (4) are all perpendicular to the upper and lower walls of the wind tunnel and the bottom end face of the base mechanism; The pressure measuring tube (1) is fixedly installed in the first pressure measuring hole (2), and the bottom of the pressure measuring tube (1) passes through the second pressure measuring hole (3) and extends out of the elongated hole (4).

3. The transonic continuous wind tunnel wall pressure measurement device of claim 2, wherein: The base mechanism includes a base (5), and a connecting wing plate (6) is circumferentially fixed to the bottom of the outer side wall of the base (5); a plurality of elongated holes (4) are provided on the base (5), and the axis of the elongated holes (4) is perpendicular to the bottom end face of the base (5). The connecting wing plate (6) is installed on the upper and lower hole walls of the wind tunnel by the fasteners; the cover plate mechanism is detachably connected to the top of the base (5) by the connecting assembly.

4. The transonic continuous wind tunnel wall pressure measurement device of claim 3, wherein: The base (5) has a mounting groove (7) circumferentially opened on the top of the outer side wall; The cover plate mechanism includes a cover plate body (8), and a plurality of first pressure measuring holes (2) and a plurality of second pressure measuring holes (3) are respectively opened on the top surface and the bottom surface of the cover plate body (8); a slot (9) is opened on the bottom surface of the cover plate body (8) to engage with the mounting groove (7), and the slot (9) communicates with the second pressure measuring holes (3); The connecting component penetrates the outer side wall of the cover plate body (8) and extends into the base (5). The connecting component is detachably connected to both the cover plate body (8) and the base (5).

5. The transonic continuous wind tunnel wall pressure measurement device of claim 4, wherein: The connecting assembly includes several first screws (10); several first threaded through holes (11) are provided on the bottom of the outer wall of the cover plate body (8), and the first threaded through holes (11) are connected to the slot (9); several second threaded through holes (12) are provided on the groove wall of the mounting groove (7), the second threaded through holes (12) are connected to the elongated hole (4), and the second threaded through holes (12) are provided in a one-to-one correspondence with the first threaded through holes (11); the first screws (10) pass through the first threaded through holes (11) and extend into the second threaded through holes (12), and the first screws (10) are threadedly connected to the first threaded through holes (11) and the second threaded through holes (12).

6. The transonic continuous wind tunnel wall pressure measurement device of claim 3, wherein: The connecting wing plate (6) has several countersunk holes (13), and the fastener includes several second screws (14). The second screws (14) pass through the countersunk holes (13) and are threaded to the upper and lower hole walls of the wind tunnel.

7. The transonic continuous wind tunnel wall pressure measurement device of claim 4, wherein: The opposite ends of the base (5) and the cover plate body (8) are both provided with spherical leading edges (15).

8. The transonic continuous wind tunnel wall pressure measurement device of claim 4, wherein: The distance between the bottom surface of the base (5) and the top surface of the cover plate body (8) is not less than the thickness of the upper and lower wall surface layers of the wind tunnel.

9. The transonic continuous wind tunnel wall pressure measurement device of claim 2, wherein: The diameter of the first pressure measuring hole (2) is not greater than 1.2 mm; the spacing between several of the first pressure measuring holes (2) is not less than 3 mm.

10. The transonic continuous wind tunnel wall pressure measurement device of claim 1, wherein: The pressure measuring tube (1) is numbered.

Images