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Method of Compensating for Insufficient Vertical Acceleration of Catapult Delivery Model in High Speed ​​Wind Tunnel

A vertical acceleration and high-speed wind tunnel technology, which is applied in the testing of machines/structural components, measuring devices, instruments, etc., can solve problems such as inconsistency, distortion of high-speed wind tunnel launch model test results, and displacement differences in the vertical direction of vertical acceleration. , to achieve the effect of overcoming the lack of vertical acceleration

Active Publication Date: 2018-08-07
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology

[0005] When using the dimensional analysis method to deduce the dimensional relationship between the light model test model and the actual aircraft, it is found that the ratio of the gravity to the aerodynamic force of the model is inconsistent with the ratio of the gravity to the aerodynamic force of the actual object, and the vertical acceleration of the model is insufficient, which leads to the vertical acceleration of the model. The displacement is different from the real one, which may lead to distortion of the results of the high-speed wind tunnel ejection model test

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  • Method of Compensating for Insufficient Vertical Acceleration of Catapult Delivery Model in High Speed ​​Wind Tunnel
  • Method of Compensating for Insufficient Vertical Acceleration of Catapult Delivery Model in High Speed ​​Wind Tunnel
  • Method of Compensating for Insufficient Vertical Acceleration of Catapult Delivery Model in High Speed ​​Wind Tunnel

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Embodiment Construction

[0043] The present invention will be further described in detail below in conjunction with the embodiments, so that those skilled in the art can implement it with reference to the description.

[0044] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0045] This method is proposed based on the insufficient vertical acceleration of the ejection test model in a high-speed wind tunnel.

[0046] The invention provides a method for compensating for the lack of vertical acceleration of a high-speed wind tunnel ejection model, which includes: always applying a vertically downward external constant on the high-speed wind tunnel ejection model during the movement process of the high-speed wind tunnel ejection model Force G N , to compensate for the lack of vertical acceleration of the high-speed wind tunnel ejection delivery model.

[0047] I...

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Abstract

The invention discloses a method for compensating the deficiency of vertical acceleration of a high speed wind tunnel ejection release model. The method comprises the step that in the motion process of the high speed wind tunnel ejection release model, a vertically downward externally-applied constant force GN is applied to the high speed wind tunnel ejection release model all the time, the deficiency of the vertical acceleration of the high speed wind tunnel ejection release model is compensated. According to the method for compensating the deficiency of the vertical acceleration of the high speed wind tunnel ejection release model, a constant force-'virtual gravity' is applied to the center of mass of the model all the time in the motion process of the high speed wind tunnel ejection release model, therefore, the defect that the vertical acceleration of the high speed wind tunnel ejection release model is deficient is overcome, and the degree of distortion of wind tunnel release experiment results and actual release results is reduced.

Description

technical field [0001] The invention belongs to the field of aircraft wind tunnel tests, and can be used for high-speed aircraft external objects and embedded weapon ejection model tests, in particular to a method for compensating for the lack of vertical acceleration of the high-speed wind tunnel ejection model. Background technique [0002] Aircraft external storage items such as auxiliary fuel tanks, rockets, missiles, bombs, torpedoes, air cargo, etc. When the embedded weapons of the fourth-generation fighter jets are dropped from the aircraft, these items are in the disturbance flow field of the aircraft at the initial stage of leaving the aircraft. Motion trajectory and attitude are particularly important to ensure the safety of the aircraft. The characteristics of the disturbance flow field are related to many factors such as the shape of the aircraft, flight speed, flight altitude, attitude of the aircraft, the shape of the external objects and their installation pos...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/08
CPCG01M9/08
Inventor 宋威蒋增辉贾区耀
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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