CN114001917A - Method for assembling and disassembling control surface angle sheet - Google Patents
Method for assembling and disassembling control surface angle sheet Download PDFInfo
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- CN114001917A CN114001917A CN202111290183.1A CN202111290183A CN114001917A CN 114001917 A CN114001917 A CN 114001917A CN 202111290183 A CN202111290183 A CN 202111290183A CN 114001917 A CN114001917 A CN 114001917A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses a method for assembling and disassembling a control surface angle sheet, which is based on a wind tunnel test model for changing the angle of a control surface by an angle sheet, and comprises the following steps: the model comprises a model body, a measuring rudder arranged on the model body and a plurality of angle pieces with different angles at the bottom end, and is characterized in that the measuring rudder comprises a rudder surface and a rudder shaft fixedly connected to one side of the rudder surface, the rudder shaft is provided with a straight groove for fixing the angle of the rudder surface, one side of the model body is provided with a mounting hole, and the rudder shaft can be movably connected in the mounting hole; the top intermediate position of angle piece, a housing screw with the connection can be dismantled to the model body, just the bottom of angle piece with the bottom of straight line groove is supported and is leaned on. The angle piece replacing mechanism has the advantages that the angle piece can be inserted into or pulled out of the model body under the driving of the compression screw, the replacing process of the angle piece is accelerated, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of wind tunnel tests, in particular to a control surface angle sheet mounting and dismounting method for mounting and positioning an aircraft control surface and a hinge moment balance.
Background
When carrying out the hinge moment test, whether the transform of the angle of measuring the rudder is accurate reliable has decisive influence to the test data. The currently common rudder angle measuring transformation modes include the following two modes: (1) positioning an angle sheet and compressing by a screw; (2) and (5) integrally processing the fixed deflection angle. In the first mode, the angle piece needs to be inserted into the model, and the angle piece needs to be taken out when the rudder deflection angle is changed. The existing common method is to arrange a threaded hole on the angle piece, screw a stud into the threaded hole of the angle piece during disassembly and assembly, and then insert the angle piece into the model or pull the angle piece out of the model by holding the stud by hand. The main disadvantages of this approach are: (1) the stud is required to be specially processed, so that the processing amount is increased; (2) the angle piece is required to have enough thickness; (3) the replacement efficiency is reduced.
The invention provides a method for assembling and disassembling a control surface angle sheet, which not only can play a role in changing the angle of a control surface, but also can enable the angle sheet to be inserted into or pulled out of a model body under the driving of a compression screw.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a wind tunnel test model with an angle plate for changing an angle of a control surface, comprising:
the model comprises a model body, a measuring rudder arranged on the model body and a plurality of angle pieces with different angles at the bottom end, and is characterized in that the measuring rudder comprises a rudder surface and a rudder shaft fixedly connected to one side of the rudder surface, the rudder shaft is provided with a straight groove for fixing the angle of the rudder surface, one side of the model body is provided with a mounting hole, and the rudder shaft can be movably connected in the mounting hole;
the top intermediate position of angle piece can be dismantled and be connected with first housing screw, first housing screw with the connection can be dismantled to the model body, just the bottom of angle piece with the bottom of a word groove is supported and is leaned on.
Preferably, the mode that the first compression screw is detachably connected to the middle position of the top of the angle piece is as follows: the middle positions of the tops of the angle pieces are all provided with convex grooves which penetrate through the two sides and the top ends; the first compression screw comprises a stud section, a first cylindrical section and a second cylindrical section which are integrally formed from top to bottom, the first cylindrical section and the second cylindrical section are in a convex shape as a whole, and the diameter of the stud section is larger than that of the second cylindrical section; the angle pieces can be sleeved and connected with the first cylindrical section and the second cylindrical section through the convex-shaped grooves.
Preferably, the first compression screw and the model body are detachably connected in a manner that: the middle position of the model body corresponding to the straight groove in the mounting hole is provided with a threaded hole in a penetrating mode, and the first compression screw is detachably connected with the model body through threads.
Preferably, the diameter of the first cylindrical section is smaller than the width of the top of the convex-shaped groove, and the length of the first cylindrical section is larger than the height of the top of the convex-shaped groove; the diameter of the second cylindrical section is smaller than the width of the bottom of the convex groove, and the height of the second cylindrical end is smaller than the height of the bottom of the convex groove; the diameter of the screw column section is larger than that of the first cylindrical section, and a bottom end protruding portion of the screw column section abuts against the top end of the angle piece.
Preferably, the device further comprises a second compression screw detachably connected in the threaded hole, and a bottom end of the second compression screw abuts against a top end of the first compression screw.
Preferably, the model body is further provided with a positioning hole for positioning the angle piece at a position corresponding to the middle position of the straight groove in the mounting hole, and the middle position of the positioning hole is communicated with the threaded hole.
A method for assembling and disassembling a control surface angle sheet is based on a wind tunnel test model for changing the angle of a control surface by the angle sheet, and comprises the following steps:
inserting a rudder shaft of a measuring rudder into an installation hole of a model main body;
step two, sleeving and connecting the first compression screws together through a convex groove at the top of the angle sheet;
step three, the combination body of the first compression screw and the angle sheet is held by hands and inserted into the positioning hole and the threaded hole on the model body until the screw column section of the first compression screw is contacted with the threaded hole of the model body;
rotating the screw column section of the first compression screw by using a screwdriver to gradually push the angle sheet towards the interior of the model, and simultaneously, manually adjusting the position and the angle of the control surface to insert the bottom end of the angle sheet into the linear groove on the control shaft;
step five, continuing to rotate the first compression screw through the screwdriver until the bottom end of the angle piece is abutted against the bottom end of the straight groove and the control surface is not movable;
and step six, after the first compression screw is installed in place in the threaded hole, a screwdriver is used for installing a second compression screw, and the bottom end of the second compression screw is abutted against the top end of the first compression screw in the threaded hole.
And seventhly, after the wind tunnel test of the specific rudder deflection angle is finished, disassembling the angle pieces according to opposite steps, and replacing the angle pieces with different angles according to the steps until the tests of the angle pieces are completely finished.
The invention at least comprises the following beneficial effects:
firstly, the angle sheet can play a role in changing the angle of the control surface, and meanwhile, the angle sheet can be inserted into or pulled out of the model body under the driving of the compression screw, so that the process of replacing the angle sheet is accelerated, and the working efficiency is improved.
Its two, through the size difference between first cylinder section, second cylinder section and the type groove of dogbone for angle piece bottom can support with the bottom in type groove and lean on, has ensured the position restriction effect to the control surface.
Third, through the second housing screw that sets up, strengthened the joint strength of angle piece with a word groove, reach the effect of better restriction control surface activity ability, have simultaneously and strengthen first housing screw and model body coupling relation, prevent the effect that first housing screw collapses.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the measuring rudder structure of the invention.
Fig. 3 is a partial structural sectional view of the present invention.
FIG. 4 is a schematic view of the angle plate structure of the present invention.
Fig. 5 is a schematic view of the compression screw structure of the present invention.
The specific implementation mode is as follows:
the present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be understood that in the description of the present invention, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are used only for convenience in describing the present invention and for simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or a communication between two elements, and those skilled in the art will understand the specific meaning of the terms in the present invention specifically.
Further, in the present invention, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Fig. 1 shows an implementation form of the present invention, which includes:
the model comprises a model body 1, a measuring rudder 2 arranged on the model body 1 and a plurality of angle pieces 3 with different angles at the bottom ends, and is characterized in that the measuring rudder 2 comprises a control surface 21 and a control shaft 22 fixedly connected to one side of the control surface, the control shaft 22 is provided with a straight groove 23 for fixing the angle of the control surface 21, one side of the model body 1 is provided with a mounting hole 13, and the control shaft 22 can be movably connected in the mounting hole 13;
the top intermediate position of angle piece 3 can be dismantled and be connected with first housing screw 4, first housing screw 4 with the connection can be dismantled to model body 1, just the bottom of angle piece 3 with the bottom of I-shaped groove 23 is supported and is leaned on.
In the technical scheme, the effect of changing the angle of the control surface can be achieved, and meanwhile, the angle sheet can be inserted into the model body or pulled out of the model body under the driving of the compression screw, so that the process of replacing the angle sheet is accelerated, and the working efficiency is improved. The working principle is as follows: insert the rudder axle 22 of measuring rudder 2 in the mounting hole 13, can dismantle the connection back with the angle piece 3 of first housing screw 4 and needs angle, can dismantle the connection again with first housing screw 4 and model body 1 to support through the bottom of adjusting first housing screw 4 with the bottom of angle piece 3 and the bottom of straight groove 23 and lean on, make rudder face 21 be the unable active state. When the angle of the control surface needs to be changed, the steps are reversed, the angle pieces 3 with different angles are detachably connected with the first compression screws 4, and the steps are repeated to perform the test.
In the above scheme, the mode that the top middle position of angle piece 3 can be dismantled and be connected with first housing screw 4 does: the middle positions of the tops of the angle pieces 3 are provided with convex grooves 31 which penetrate through the two sides and the top ends; the first compression screw 4 comprises a stud section 41, a first cylindrical section 42 and a second cylindrical section 43 which are integrally formed from top to bottom, the first cylindrical section 42 and the second cylindrical section 43 are integrally convex, and the diameter of the stud section 41 is larger than that of the second cylindrical section 43; the plurality of angle pieces 3 can be sleeved with the first cylindrical section 41 and the second cylindrical section 42 through the convex-shaped grooves 31.
The working principle is as follows: the convex groove 31 runs through the two sides and the top end of the angle piece 3, and is convenient to be quickly connected with or detached from the first cylindrical section 42 and the second cylindrical section 43. When the angle piece 3 is inserted into the model body 1, the stud section 41 is the largest diameter of the first compression screw 4, so that the connection with the model body 1 is facilitated, and the angle piece 3 is facilitated to be pushed in. When the angle piece 3 is pulled out, the protruding part at the top end of the second cylindrical section 43 is matched with the convex-shaped groove 31, so that the angle piece 3 is conveniently pulled out.
In the above scheme, the detachable connection mode of the first compression screw 4 and the model body 1 is as follows: the model body 1 is provided with a threaded hole 12 corresponding to the straight groove 23 at the middle position in the mounting hole 13 in a penetrating manner, and the first compression screw 4 is detachably connected with the model body 1 through threads. When the mode is adopted to ensure the connection stability, the effect of positioning the installation position of the angle sheet is achieved. Also, this manner is merely an illustration of a preferred example, but not limited thereto. When the invention is implemented, appropriate replacement and/or modification can be carried out according to the requirements of users.
In the above solution, the diameter of the first cylindrical section 42 is smaller than the width of the top of the convex-shaped groove 31, and the length of the first cylindrical section 42 is larger than the height of the top of the convex-shaped groove 31; the diameter of the second cylindrical section 43 is smaller than the width of the bottom of the convex-shaped groove 31, and the height of the second cylindrical end 43 is smaller than the height of the bottom of the convex-shaped groove 31; and the bottom end projection of the stud segment 41 abuts against the top end of the angle piece 3. Adopt this kind of mode to be convenient for when the bottom of angle piece 3 advances to a word groove 23 in, can continue to advance angle piece 3 through first housing screw 4, lean on the bottom of angle piece 3 and the bottom of a word groove 23, reach the effect of restriction control surface 21 activity. Also, this manner is merely an illustration of a preferred example, but not limited thereto. When the invention is implemented, appropriate replacement and/or modification can be carried out according to the requirements of users.
In the above solution, the device further includes a second compression screw 5 detachably connected in the threaded hole 12, and a bottom end of the second compression screw 5 abuts against a top end of the first compression screw 4. Adopt this kind of mode to have the joint strength who strengthens angle piece and straight line groove, reach the effect of the active ability of better restriction control plane 21, have simultaneously and strengthen first housing screw 4 and model body 1 connected relation, prevent the effect that first housing screw 4 collapses to be broken. Also, this manner is merely an illustration of a preferred example, but not limited thereto. When the invention is implemented, appropriate replacement and/or modification can be carried out according to the requirements of users.
In the above solution, the model body 1 further has a positioning hole 11 for positioning an angle piece at a middle position in the mounting hole 13 corresponding to the straight groove 23, and the middle position of the positioning hole 11 is communicated with the threaded hole 12. Adopt this kind of mode to have when the length of angle piece is greater than 4 maximum diameters of first housing screw, guarantee that the angle piece can get into inside model body 1 to can align the bottom of angle piece with straight groove 23 fast through locating hole 11, have the effect of accelerating angle piece installation process and improving work efficiency. Also, this manner is merely an illustration of a preferred example, but not limited thereto. When the invention is implemented, appropriate replacement and/or modification can be carried out according to the requirements of users.
A method for assembling and disassembling a control surface angle sheet comprises the following steps:
firstly, inserting a rudder shaft 2 of a measuring rudder into an installation hole 13 of a model body 1,
step two, sleeving and connecting the first compression screws 4 together through the convex grooves 31 at the tops of the angle pieces 3;
step three, the combination of the first compression screw 4 and the angle sheet 3 is held by hands and inserted into the positioning hole 11 and the threaded hole 12 on the model body 1 until the screw column section 41 of the first compression screw 4 is contacted with the threaded hole 12 of the model body 1;
step four, a screw bolt section 41 of the first compression screw 4 is rotated by a screwdriver, so that the angle piece 3 is gradually pushed towards the interior of the model 1, and meanwhile, the position and the angle of the control surface 21 are adjusted by holding in hand, so that the bottom end of the angle piece 3 is inserted into the straight groove 23 on the control shaft 22;
step five, continuing to rotate the first compression screw 4 through the screwdriver until the bottom end of the angle piece 3 is abutted against the bottom end of the straight-line groove 23 and the control surface 21 is not movable;
and step six, after the first compression screw 4 is installed in place in the threaded hole 12, a screwdriver is used for installing the second compression screw 5, and the bottom end of the second compression screw 5 is abutted against the top end of the first compression screw 4 in the threaded hole 12.
And seventhly, after the wind tunnel test of the specific rudder deflection angle is finished, disassembling the angle sheet 3 according to the opposite steps, and replacing the angle sheets with other different angles according to the steps until the tests of the angle sheets are completely finished.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. A wind tunnel test model with an angle sheet for changing the angle of a control surface comprises a model body, a measuring rudder arranged on the model body and a plurality of angle sheets with different angles at the bottom end, and is characterized in that the measuring rudder comprises a control surface and a control shaft fixedly connected to one side of the control surface, the control shaft is provided with a straight groove for fixing the angle of the control surface, one side of the model body is provided with a mounting hole, and the control shaft is movably connected in the mounting hole;
the top intermediate position of angle piece can be dismantled and be connected with first housing screw, first housing screw with the connection can be dismantled to the model body, just the bottom of angle piece with the bottom of a word groove is supported and is leaned on.
2. The wind tunnel test model for changing the angle of the control surface by the angle piece according to claim 1, wherein the top middle position of the angle piece is detachably connected with a first compression screw in a mode that: the middle positions of the tops of the angle pieces are all provided with convex grooves which penetrate through the two sides and the top ends; the first compression screw comprises a stud section, a first cylindrical section and a second cylindrical section which are integrally formed from top to bottom, the first cylindrical section and the second cylindrical section are in a convex shape as a whole, and the diameter of the stud section is larger than that of the second cylindrical section; the angle pieces can be sleeved and connected with the first cylindrical section and the second cylindrical section through the convex-shaped grooves.
3. The wind tunnel test model for changing the angle of the control surface by the angle piece according to claim 1, wherein the detachable connection mode of the first compression screw and the model body is as follows: the middle position of the model body corresponding to the straight groove in the mounting hole is provided with a threaded hole in a penetrating mode, and the first compression screw is detachably connected with the model body through threads.
4. The wind tunnel test model for changing the angle of the control surface by the angle piece according to claim 2, wherein the diameter of the first cylindrical section is smaller than the width of the top of the convex-shaped groove, and the length of the first cylindrical section is larger than the height of the top of the convex-shaped groove; the diameter of the second cylindrical section is smaller than the width of the bottom of the convex groove, and the height of the second cylindrical end is smaller than the height of the bottom of the convex groove; the diameter of the screw column section is larger than that of the first cylindrical section, and a bottom end protruding portion of the screw column section abuts against the top end of the angle piece.
5. The wind tunnel test model for changing the angle of the control surface by the angle piece according to claim 3, further comprising a second compression screw detachably connected in the threaded hole, wherein the bottom end of the second compression screw abuts against the top end of the first compression screw.
6. The wind tunnel test model for changing the angle of the control surface by the angle piece according to claim 3, wherein a positioning hole for positioning the angle piece is further arranged at the middle position of the model body corresponding to the straight groove in the mounting hole in a penetrating manner, and the middle position of the positioning hole is communicated with the threaded hole.
7. A method for assembling and disassembling a control surface angle sheet is based on the wind tunnel test model for changing the angle of the control surface by the angle sheet according to any one of claims 1 to 6, and is characterized by comprising the following steps of:
inserting a rudder shaft of a measuring rudder into an installation hole of a model main body;
step two, sleeving and connecting the first compression screws together through a convex groove at the top of the angle sheet;
step three, the combination body of the first compression screw and the angle sheet is held by hands and inserted into the positioning hole and the threaded hole on the model body until the screw column section of the first compression screw is contacted with the threaded hole of the model body;
rotating the screw column section of the first compression screw by using a screwdriver to gradually push the angle sheet towards the interior of the model, and simultaneously, manually adjusting the position and the angle of the control surface to insert the bottom end of the angle sheet into the linear groove on the control shaft;
step five, continuing to rotate the first compression screw through the screwdriver until the bottom end of the angle piece is abutted against the bottom end of the straight groove and the control surface is not movable;
and step six, after the first compression screw is installed in place in the threaded hole, a screwdriver is used for installing a second compression screw, and the bottom end of the second compression screw is abutted against the top end of the first compression screw in the threaded hole.
And seventhly, after the wind tunnel test of the specific rudder deflection angle is finished, disassembling the angle pieces according to opposite steps, and replacing the angle pieces with different angles according to the steps until the tests of the angle pieces are completely finished.
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| CN202111290183.1A CN114001917B (en) | 2021-11-02 | 2021-11-02 | Control surface angle piece assembling and disassembling method |
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| CN202111290183.1A CN114001917B (en) | 2021-11-02 | 2021-11-02 | Control surface angle piece assembling and disassembling method |
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| CN115541175A (en) * | 2022-12-02 | 2022-12-30 | 中国空气动力研究与发展中心超高速空气动力研究所 | Design method of variable attack angle module of small-caliber closed wind tunnel test section |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057000A (en) * | 2022-08-16 | 2022-09-16 | 中国空气动力研究与发展中心空天技术研究所 | Zero calibration device and calibration method for hypersonic aircraft air rudder system |
| CN115057000B (en) * | 2022-08-16 | 2022-11-01 | 中国空气动力研究与发展中心空天技术研究所 | Zero calibration device and calibration method for hypersonic aircraft air rudder system |
| CN115541175A (en) * | 2022-12-02 | 2022-12-30 | 中国空气动力研究与发展中心超高速空气动力研究所 | Design method of variable attack angle module of small-caliber closed wind tunnel test section |
| CN115541175B (en) * | 2022-12-02 | 2023-02-03 | 中国空气动力研究与发展中心超高速空气动力研究所 | Design method of small-caliber closed wind tunnel test section variable attack angle module |
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