Outdoor flow field calibration device and equipment

Abstract

The invention relates to the technical field of flow field calibration, in particular to an outdoor flow field calibration device and equipment, and the device comprises a test element and a frame assembly. The testing element comprises a pitot tube. The frame assembly comprises a frame tube, a tube clamp and a tube clamp guide rail. The frame pipe comprises a first strip-shaped hole and a second strip-shaped hole, the pipe clamp and the pipe clamp guide rail are arranged in the frame pipe, and the pipe clamp and the pipe clamp guide rail are detachably connected through a fastening structure; the tail end of the pitot tube is connected with the tube clamp, the front end of the pitot tube penetrates out of the frame tube through the first strip-shaped hole, and the second strip-shaped hole faces the fastening structure. The position of the pitot tube is simple and rapid to adjust, so that the pitot tube can adapt to different flow field calibration requirements, the frame tube plays a role in protecting static pressure and dynamic pressure guide tubes of part of the pitot tube, the service life of the pressure guide tubes can be prolonged, the layout design of pipelines is more reasonable and more attractive, the whole device is convenient to move, the center height is adjustable, and the cost is reduced. The method is more suitable for outdoor use scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of flow field calibration, and in particular to an outdoor flow field calibration device and equipment. Background Art

[0002] With the development of the aviation engine industry, there is an urgent need to conduct large-scale crosswind tests on outdoor open-air test benches to obtain the working characteristics of the engine under different wind directions and wind speeds, and at the same time clarify the crosswind boundary of the engine on the ground, so as to optimize the compatibility of the inlet and the engine, and provide guarantee for the safe operation of the aircraft under crosswind conditions. The flow field range provided by the outdoor large-scale crosswind test equipment is very large, the outlet diameter can exceed 8 meters, and the outlet wind speed can reach 25 meters / second, or even higher. When calibrating its flow field, it is necessary to perform calibration work at certain specific locations away from the outlet of the crosswind test equipment.

[0003] Traditional flow field calibration devices are usually used in indoor environments. They are small in scale and cannot meet the needs of outdoor large-scale flow field calibration. The main difficulties in the application of outdoor flow field calibration devices include:

[0004] The calibration device is heavy, weighing more than 3 tons, and is difficult to move and adjust. The calibration device is high, exceeding 10 meters, and has poor structural stability. The installation and adjustment of the measuring element (Pitot tube) are not only cumbersome and difficult to adjust, but also highly dangerous to operate. The measuring element has a large number of static and dynamic pressure pipes, and improper arrangement will interfere with the flow field. In addition, the pressure pipes are prone to aging and failure when exposed to the open air for a long time. Summary of the invention

[0005] In order to solve at least the above technical problems existing in the prior art, the present invention provides an outdoor flow field calibration device and equipment.

[0006] On the one hand, the present invention provides an outdoor flow field calibration device, including a test element and a frame assembly for supporting the test element; the test element includes a Pitot tube, and the frame assembly includes a frame tube, a tube clamp and a tube clamp guide rail; the frame tube includes a first strip hole and a second strip hole arranged along the length direction of the frame tube, the tube clamp and the tube clamp guide rail are arranged in the frame tube, and the tube clamp and the tube clamp guide rail are detachably connected through a fastening structure; the end of the Pitot tube is connected to the tube clamp, and the front end of the Pitot tube passes through the frame tube via the first strip hole, and the second strip hole is arranged toward the fastening structure.

[0007] In some embodiments, the frame tube is a square tube, the first strip hole is arranged at the front end surface of the frame tube, and the second strip hole is arranged at the top end surface of the frame tube; the frame tube also includes a third strip hole arranged along the length direction of the frame tube, and the third strip hole is used to install the Pitot tube and the auxiliary pressure-guiding tube of the Pitot tube.

[0008] In some embodiments, the pipe clamp includes an upper clamping portion and a lower clamping portion stacked together, wherein the upper clamping portion and the lower clamping portion are used to clamp the end of the Pitot tube; the fastening structure includes a fastening bolt, which passes through the upper clamping portion and the lower clamping portion in sequence and is fastened to the pipe clamp guide rail.

[0009] In some embodiments, the frame assembly also includes a deflector, which includes a windward tip surface, an upper surface and a lower surface; the upper surface and the lower surface are inclined, and the upper surface and the lower surface are respectively connected to the top and bottom ends of the frame tube.

[0010] In some embodiments, the frame tube includes a transverse tube and a vertical tube; the transverse tube and the vertical tube are cross-arranged, and the tube clamp, the tube clamp guide rail and the Pitot tube are arranged on the transverse tube and the vertical tube.

[0011] In some embodiments, a frame is further included, the frame assembly is connected to the frame, and the frame is used to support the frame assembly and the test element to a set height; both ends of the frame tube are fixedly connected to the frame, and the frame is provided with a through hole connected to the frame tube, and the auxiliary pressure tube of the Pitot tube is led out through the through hole.

[0012] In some embodiments, the frame includes an upper measuring frame and a lower measuring frame, and the frame assembly is arranged on the upper measuring frame; the bottom width of the lower measuring frame is greater than the top width, and the top end of the lower measuring frame is detachably connected to the bottom end of the upper measuring frame.

[0013] In some embodiments, a transverse traction frame and a longitudinal traction frame are provided on the lower measuring frame; and / or a wheel structure with a self-locking function is provided at the bottom of the lower measuring frame.

[0014] In some embodiments, the lower measuring frame further includes a lifting structure; a plurality of the lifting structures are arranged on the edge of the bottom of the lower measuring frame, and the lifting structures are used to adjust the center height of the frame.

[0015] Another aspect of the present invention provides an outdoor flow field calibration device, including the above-mentioned outdoor flow field calibration device.

[0016] The present invention provides an outdoor flow field calibration device and equipment, the end of the pitot tube is connected to the pipe clamp, the end of the pitot tube, the pipe clamp and the pipe clamp guide rail are all arranged in the frame tube, when the position of the pitot tube needs to be adjusted, the fastening structure is removed, the pitot tube is adjusted to the desired position by the pipe clamp, and then the pipe clamp is locked on the pipe clamp guide rail at the current position by using the fastening structure. The technical solution of the present invention is simple and fast to adjust the position of the pitot tube, so that the pitot tube can adapt to different flow field calibration requirements, and the frame tube protects the static pressure and dynamic pressure guide pipes of some pitot tubes, which can increase the service life of the guide pipes, and the layout design of the pipeline is more reasonable and more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0018] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0019] Figure 1 A schematic diagram of the structure of an outdoor flow field calibration device provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure of an upper measuring frame in an outdoor flow field calibration device provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the structure of a frame assembly in an outdoor flow field calibration device provided by an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of the structure of the frame pipe in the outdoor flow field calibration device provided by an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the structure of the pipe clamp and the pipe clamp guide rail in the outdoor flow field calibration device provided by an embodiment of the present invention;

[0024] Figure 6 A cross-sectional view of a frame assembly in an outdoor flow field calibration device provided in an embodiment of the present invention.

[0025] In the figure:

[0026] 10: test element; 20: frame assembly; 30: upper measuring frame; 40: lower measuring frame;

[0027] 21: frame tube; 211: first strip hole; 212: second strip hole; 213: horizontal tube; 214: vertical tube; 215: third strip hole; 22: tube clamp; 221: upper clamp; 222: lower clamp; 23: tube clamp guide rail; 24: fastening structure; 25: deflector; 26: fastening nut;

[0028] 31: Perforation;

[0029] 41: transverse traction frame; 42: longitudinal traction frame; 43: wheel structure; 44: lifting structure. DETAILED DESCRIPTION

[0030] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0031] An embodiment of the present invention provides an outdoor flow field calibration device, including a frame, the frame including an upper measuring frame and a lower measuring frame, and a test element and a frame assembly are arranged on the upper measuring frame; the upper measuring frame and the lower measuring frame are detachably connected, and the adjustment of the test element does not require long-term high-altitude operation, and the adjustment of the Pitot tube is simple and quick, which can meet the flow field calibration needs of large outdoor crosswind test equipment.

[0032] The following is a detailed description of the various structures of the outdoor flow field calibration device provided by the embodiment of the present invention, as well as the positional relationship and connection relationship between the various structures, in conjunction with the accompanying drawings.

[0033] like Figures 1 to 6 As shown, in the embodiment of the present invention, the outdoor flow field calibration device includes a frame, and the frame includes an upper measuring frame 30 and a lower measuring frame 40. The upper measuring frame 30 and the lower measuring frame 40 have a certain height to meet the outdoor flow field calibration.

[0034] Among them, the frame assembly 20 and the test element 10 are arranged on the upper measuring frame 30; the upper measuring frame 30 and the lower measuring frame 40 are arranged to be detachably connected. When the test element 10 is installed or debugged, the upper measuring frame 30 is removed from the lower measuring frame 40, thereby lowering the supported height of the frame assembly 20 and the test element 10, avoiding long-term high-altitude operations for the staff, and ensuring the installation accuracy of the test element 10.

[0035] For example, the top of the lower measuring frame 40 is a supporting plane, and the bottom of the upper measuring frame 30 is an installation plane. During assembly, the two structures are superimposed and then fixedly connected. When the upper measuring frame 30 is removed, the installation plane can also be placed on a horizontal plane to ensure that the upper measuring frame 30 is placed stably.

[0036] In the embodiment of the present invention, the detachable connection method of the upper measuring frame 30 and the lower measuring frame 40 is not limited. For example, the upper measuring frame 30 and the lower measuring frame 40 can be connected by bolt connection, riveting, etc.

[0037] For example, the lower measuring frame 40 is constructed by multiple steel trusses. The bottom width of the lower measuring frame 40 is greater than the top width and presents a trapezoidal structure. This structure can increase the stability of the lower measuring frame 40 and the frame as a whole and prevent the flow field calibration device from tipping over during movement.

[0038] For example, movable structures or lifting structures 44 are respectively arranged on both sides of the lower measuring frame 40, while no other functional structural parts are arranged at the bottom of the lower measuring frame 40, and there is a set interval between the bottom of the lower measuring frame 40 and the surface where the lower measuring frame 40 is located, such as the interval height is 200 mm to 400 mm. This part of the interval space can improve the passability of the flow field calibration device during the movement process, and can easily cross the obstacles on the surface where the frame is located.

[0039] In the embodiment of the present invention, the frame is heavy and difficult to move, so an independent traction structure can be set on the lower measuring frame 40, and the traction device is connected to the traction structure, which can facilitate the movement of the frame, and a wheel structure 43 is configured at the bottom of the lower measuring frame 40, and the wheel structure 43 cooperates with the traction device to facilitate the movement of the frame. Among them, the pre-set traction structure is selected in a reasonable position, such as in the middle of the connected side, which is conducive to the stability of the frame during the traction operation and reduces the difficulty of moving the frame.

[0040] For example, a transverse traction frame 41 and a longitudinal traction frame 42 are provided on the lower measuring frame 40, wherein the transverse traction frame 41 is a force application point for transverse movement, and the longitudinal traction frame 42 is a force application point for longitudinal movement. The transverse traction frame 41 and the longitudinal traction frame 42 are fixedly connected to the lower measuring frame 40, and a connection structure such as a traction ring or a traction foot is provided thereon.

[0041] For example, a wheel structure 43 with a self-locking function is provided at the bottom of the lower measuring frame 40. When it is necessary to move, the wheel structure 43 is unlocked, and the outdoor flow field calibration device can be moved with the help of traction equipment. For example, the wheel structure 43 is a universal wheel, which has higher rotation flexibility.

[0042] Through the cooperation of the traction frame and the wheel structure 43, with the aid of tools such as a tractor, the outdoor flow field calibration device can be moved more easily, effectively solving the problem of difficulty in moving and adjusting the position of the large outdoor flow field calibration device due to its heavy weight.

[0043] In the embodiment of the present invention, the lower measuring frame 40 further includes a lifting structure 44; a plurality of lifting structures 44 are arranged at the edge of the bottom of the lower measuring frame 40, and the lifting structures 44 are used to adjust the center height of the frame.

[0044] For example, the lifting structure 44 is a jack, and a plurality of jacks are arranged at the bottom of the lower measuring frame 40. The height of the frame part can be adjusted by the extension and retraction of the jacks. For example, jacks are arranged at the four corners of the lower measuring frame 40, wherein the extension length of the jacks can be selected according to the adjustment range of the center height. When the jack is not in use, it is in a retracted state and does not contact the ground. The wheel structure 43 of the lower measuring frame 40 contacts the ground. When the jack is in use, it is in an extended state. The length is determined according to the adjustment requirements of the center height. After extension, the jack contacts the ground. If it continues to extend, the height can be adjusted.

[0045] Continue to refer Figures 1 to 6 As shown, the test element 10 includes a pitot tube, and the frame assembly 20 includes a frame tube 21, a tube clamp 22, and a tube clamp guide rail 23; the frame assembly 20 is arranged on the upper measuring frame 30 in a set form. For example, the frame tube 21 includes a transverse tube 213 and a vertical tube 214; the transverse tube 213 and the vertical tube 214 are arranged crosswise, and the tube clamp 22, the tube clamp guide rail 23, and the pitot tube are arranged on the transverse tube 213 and the vertical tube 214.

[0046] For example, the upper measuring frame 30 includes a plurality of steel sections, and the frame pipe 21 is installed on the upper measuring frame 30 assembled from the steel sections.

[0047] A plurality of tube clamps 22, tube clamp guide rails 23 and pitot tubes are arranged on the transverse tube 213 and the vertical tube 214 for flow field calibration. In order to meet different flow field calibration requirements, the position of the pitot tube needs to be fine-tuned.

[0048] In the embodiment of the present invention, the frame tube 21 includes a first strip hole 211 and a second strip hole 212 arranged along the length direction of the frame tube 21, the tube clamp 22 and the tube clamp guide rail 23 are arranged in the frame tube 21, and the tube clamp 22 and the tube clamp guide rail 23 are detachably connected through a fastening structure 24; the end of the Pitot tube is connected to the tube clamp 22, and the front end of the Pitot tube passes through the frame tube 21 through the first strip hole 211, and the second strip hole 212 is arranged toward the fastening structure 24.

[0049] When position adjustment is required, the locking of the pipe clamp 22 and the pipe clamp guide rail 23 by the fastening structure 24 is released through the second strip hole 212. For example, the fastening structure 24 is a bolt, and a screwdriver is inserted into the frame tube 21 through the second strip hole 212 to screw the bolt. After the locking is released, the pipe clamp 22 can move relative to the pipe clamp guide rail 23. After moving to the desired position, the fastening structure 24 is locked again to complete the position adjustment of the pipe clamp 22 and the pitot tube.

[0050] For example, the frame tube 21 is a square tube, the first strip hole 211 is arranged at the front end surface of the frame tube 21, and the second strip hole 212 is arranged at the top end surface of the frame tube 21; the frame tube 21 also includes a third strip hole 215 arranged along the length direction of the frame tube 21, and the third strip hole 215 is used to install the Pitot tube and the auxiliary pressure-guiding tube of the Pitot tube.

[0051] When installing the Pitot tube, the Pitot tube and its associated pressure-inducing tube enter the frame tube 21 through the third strip hole 215 . As the Pitot tube and its associated pressure-inducing tube pass through the frame tube 21 , the end of the Pitot tube passes through the first strip hole 211 . Then, the end of the Pitot tube is connected to the tube clamp 22 .

[0052] For example, the pipe clamp 22 includes an upper clamping portion 221 and a lower clamping portion 222 which are stacked and used to clamp the end of the pitot tube. When the upper frame portion and the lower clamping portion 222 are clamped, the end of the pitot tube is further limited.

[0053] For example, a bolt is provided between the upper clamping portion 221 and the lower clamping portion 222 , and the clamping operation between the upper clamping portion 221 and the lower clamping portion 222 is achieved by screwing the bolt.

[0054] In the embodiment of the present invention, the pipe clamp guide rail 23 includes a slide rail arranged along the length direction of the frame tube 21, and the bottom of the pipe clamp 22 is detachably connected to the slide rail; the fastening structure 24 includes a fastening bolt, which passes through the upper clamp part 221 and the lower clamp part 222 in sequence and is fastened to the pipe clamp guide rail 23.

[0055] For example, the tightening and loosening operation of the pipe clamp 22 and the tightening of the pipe clamp 22 and the slide rail can be completed by the same tightening bolt. For example, the pipe clamp guide rail 23 is a C-shaped steel pipe structure, the C-shaped steel pipe is hollow inside and includes an opening, the opening has a certain width, wherein the opening is the slide rail structure of the pipe clamp guide rail 23, a tightening nut 26 is arranged inside the C-shaped steel pipe, the tightening nut 26 is in a long strip shape, when the length of the tightening nut 26 is arranged along the length of the opening, it can be taken out from the opening, and when it is not arranged along the length of the opening, it is clamped with the inner wall of the opening, the end of the tightening bolt passes through the opening and is connected with the tightening nut 26, in the tightened state, the tightening nut 26 and the bottom of the pipe clamp 22 are clamped on both sides of the opening, thereby fixing the pipe clamp 22 on the C-shaped steel pipe, when the position of the pipe clamp 22 needs to be adjusted, the tightening bolt is loosened, and it is not necessary to separate from the tightening nut 26, and the pipe clamp 22 can be moved after the clamping is released.

[0056] In an embodiment of the present invention, the frame assembly 20 also includes a deflector 25, which includes a windward tip surface, an upper surface and a lower surface; the upper surface and the lower surface are inclined, and the upper surface and the lower surface are respectively connected to the top and bottom ends of the frame tube 21; for example, the angle of the windward tip surface is 30 degrees.

[0057] The front end of the pitot tube passes through the windward end, and screw holes are respectively provided at the top and bottom of the frame tube 21, and the upper surface and the lower surface are respectively fixedly connected to the frame tube 21 through the screw holes. For example, the screws selected for the fixed connection are round head screws to reduce the disturbance of the airflow, and the air guide cover 25 can be an integral structure or a segmented split structure.

[0058] In the embodiment of the present invention, both ends of the frame tube 21 are fixedly connected to the frame, and a through hole 31 communicating with the frame tube 21 is provided on the frame. The auxiliary pressure pipes of the pitot tube, that is, the static pressure and dynamic pressure pipes of the pitot tube are led out through the through hole 31, wherein the frame tube 21 is connected to the upper measuring frame 30 of the frame. The led-out static pressure and dynamic pressure pipes of the pitot tube are connected to a convenient operating position near the ground along the upper measuring frame 30 and the lower measuring frame 40, so as to facilitate the connection of the pressure sensor for flow field calibration. For example, the position of the through hole 31 on the frame is at the same height as the center of the transverse tube 213. The frame tube 21 has a protective effect on the pressure pipe, which can effectively avoid the aging problem of the pressure pipe under outdoor use conditions. In addition, part of the pressure pipe is arranged along the frame, which can ensure that the pressure pipe is firmly installed and avoid its disorderly distribution.

[0059] The embodiment of the present invention provides an outdoor flow field calibration device, including the outdoor flow field calibration device described above. The outdoor flow field calibration device is placed in an outdoor scene, and the required wind speed, wind pressure and other information are obtained through a pitot tube.

[0060] The present invention provides an outdoor flow field calibration device and equipment, wherein the frame includes a detachable upper measurement frame 30 and a lower measurement frame 40. The upper measurement frame 30 can adjust the pitot tube in a flat state. After the pitot tube is installed and adjusted in place, the upper measurement frame 30 is hoisted as a whole and fixedly connected to the lower measurement frame 40. This structural form effectively reduces the installation difficulty of a large flow field calibration device, avoids a large amount of high-altitude operations, and can also ensure the position accuracy of the pitot tube.

[0061] By providing the transverse traction frame 41, the longitudinal traction frame 42 and the universal wheel, the large flow field calibration device can be moved and accurately adjusted in position with the help of a tractor or other tools, thus solving the problem that the large flow field calibration device itself is difficult to move and adjust in position due to its heavy weight.

[0062] By arranging jacks at the four corner points of the lower measuring frame 40, the center height of the large flow field calibration device can be flexibly adjusted;

[0063] The position of the Pitot tube can be flexibly adjusted to meet different flow field calibration requirements through simple adjustments; and by placing the static pressure and dynamic pressure lead pipes of the Pitot tube inside the frame tube 21 and leading them out from the side of the upper measuring frame 30 to near the ground, the service life of the pressure lead pipes can be greatly improved, and the overall appearance is neat and beautiful.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0066] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An outdoor flow field calibration device, characterized in that: It comprises a test element (10) and a frame assembly (20) for supporting the test element (10); The test element (10) comprises a Pitot tube, and the frame assembly (20) comprises a frame tube (21), a tube clamp (22) and a tube clamp guide rail (23); The frame tube (21) comprises a first strip hole (211) and a second strip hole (212) arranged along the length direction of the frame tube (21); the pipe clamp (22) and the pipe clamp guide rail (23) are arranged in the frame tube (21); and the pipe clamp (22) and the pipe clamp guide rail (23) are detachably connected via a fastening structure (24); The end of the Pitot tube is connected to the tube clamp (22), and the front end of the Pitot tube passes through the frame tube (21) via the first strip hole (211), and the second strip hole (212) is arranged toward the fastening structure (24).

2. The outdoor flow field calibration device according to claim 1, characterized in that: The frame tube (21) is a square tube, the first strip-shaped hole (211) is provided on the front end surface of the frame tube (21), and the second strip-shaped hole (212) is provided on the top end surface of the frame tube (21); The frame tube (21) further comprises a third strip hole (215) arranged along the length direction of the frame tube (21), and the third strip hole (215) is used for installing the Pitot tube and an auxiliary pressure-guiding tube of the Pitot tube.

3. The outdoor flow field calibration device according to claim 2, characterized in that: The pipe clamp (22) comprises an upper clamping portion (221) and a lower clamping portion (222) which are superimposed on each other, and the upper clamping portion (221) and the lower clamping portion (222) are used to clamp the end of the pitot tube; The fastening structure (24) comprises a fastening bolt, which passes through the upper clamping portion (221) and the lower clamping portion (222) in sequence and is fastened to the pipe clamp guide rail (23).

4. The outdoor flow field calibration device according to claim 1, characterized in that: The frame assembly (20) further comprises a deflector (25), wherein the deflector (25) comprises a windward tip surface, an upper surface and a lower surface; The upper surface and the lower surface are arranged obliquely, and the upper surface and the lower surface are respectively connected to the top end and the bottom end of the frame tube (21).

5. The outdoor flow field calibration device according to claim 4, characterized in that: The frame tube (21) includes a transverse tube (213) and a vertical tube (214); The transverse tube (213) and the vertical tube (214) are arranged in a cross-like manner, and the tube clamp (22), the tube clamp guide rail (23) and the Pitot tube are arranged on both the transverse tube (213) and the vertical tube (214).

6. The outdoor flow field calibration device according to claim 2, characterized in that: It also includes a frame, the frame assembly (20) is connected to the frame, and the frame is used to support the frame assembly (20) and the test element (10) to a set height; Both ends of the frame tube (21) are fixedly connected to the frame body, and the frame body is provided with a through hole (31) communicating with the frame tube (21), and the auxiliary pressure-guiding tube of the Pitot tube is led out through the through hole (31).

7. The outdoor flow field calibration device according to claim 6, characterized in that: The frame body comprises an upper measuring frame (30) and a lower measuring frame (40), and the frame assembly (20) is arranged on the upper measuring frame (30); The bottom width of the lower measuring frame (40) is greater than the top width, and the top end of the lower measuring frame (40) is detachably connected to the bottom end of the upper measuring frame (30).

8. The outdoor flow field calibration device according to claim 7, characterized in that: The lower measuring frame (40) is provided with a transverse traction frame (41) and a longitudinal traction frame (42); and / or A wheel structure (43) with a self-locking function is provided at the bottom of the lower measuring frame (40).

9. The outdoor flow field calibration device according to claim 7, characterized in that: The lower measuring frame (40) further includes a lifting structure (44); A plurality of lifting structures (44) are arranged on the edge of the bottom of the lower measuring frame (40), and the lifting structures (44) are used to adjust the center height of the frame.

10. An outdoor flow field calibration device, characterized in that: It comprises an outdoor flow field calibration device as described in any one of claims 1 to 9.

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