Trajectory prediction method for wind tunnel multi-body separation test model

A technology of multi-body separation and test model, which is applied in the field of wind tunnel test, can solve the problems of single trajectory simulation requirements, wind tunnel test equipment damage, and CTS trajectory capture test is not widely popularized and applied, so as to achieve high timeliness and reduce costs Effect

Active Publication Date: 2021-06-15
中国空气动力研究与发展中心超高速空气动力研究所
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Problems solved by technology

For temporary wind tunnels, the running time of the wind tunnel often cannot meet the requirements of a single trajectory simulation during the test, and the separation distance often cannot meet the simulation requirements due to the structure and size of the test section and the travel limit of the ...

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  • Trajectory prediction method for wind tunnel multi-body separation test model
  • Trajectory prediction method for wind tunnel multi-body separation test model
  • Trajectory prediction method for wind tunnel multi-body separation test model

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Embodiment 1

[0049] In this embodiment, the trajectory prediction method for the multi-body separation test model in the wind tunnel is applied to the two-stage orbit model, and the device used includes 2 models and 2 force-measuring balances corresponding to the 2 models. , two model supports corresponding to the two models one-to-one, and a test data acquisition, storage and processing system; including the following steps:

[0050] a. Process a set of multi-body separation wind tunnel test models, followed by model I and model II; each model has an independent force measuring balance, followed by balance I and balance II; each model also has an independent model support , the model supports are connected to their corresponding model support mechanisms; Model I and Model II realize six-degree-of-freedom movements through their respective model support mechanisms; the whole device is as follows: figure 1 shown;

[0051] b. During the movement of Model I and Model II, communicate with the...

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Abstract

The invention discloses a trajectory prediction method for a wind tunnel multi-body separation test model. According to the prediction method, a Kriging mathematical model of six-component aerodynamic coefficients under different relative positions and postures of a multi-body separation test model is established by using multi-body separation wind tunnel grid force measurement test data, and a motion track is calculated by using a rigid body six-degree-of-freedom motion equation. The separation track is divided into a plurality of moments according to time, the aerodynamic force at the initial moment is predicted according to the mathematical model, the model posture at the next moment is calculated according to the model posture at the initial moment in combination with the motion equation, and the aerodynamic force under the model posture at the next moment continues to be predicted according to the model posture. The process is cyclically executed to obtain a separation track of the multi-body separation test model. The prediction method is simple and efficient, is not limited by the CTS mechanism, solves the problem of trajectory prediction of the multi-body model of the CTS mechanism equipment, avoids the problems and risks of travel, time, collision and the like of the CTS mechanism, and reduces the test cost.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a model track prediction method for multi-body separation tests in wind tunnels. Background technique [0002] Model trajectory measurement for the design and evaluation of aircraft separation schemes has always been a difficult problem in wind tunnel tests. In the past, the aerodynamic characteristics of the separation body were often obtained through wind tunnel force measurement or grid force measurement test at a fixed model position, and the feasibility of the aircraft separation scheme was evaluated through the analysis of the separation body aerodynamic characteristics. [0003] In recent years, with the advancement of motion machinery and electronic technology, the hypersonic wind tunnel has been equipped with a multi-degree-of-freedom trajectory test capture mechanism (CTS for short). The calculation program calculates the trajectory according to t...

Claims

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Application Information

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IPC IPC(8): G01M9/06G01M9/08G01M9/02
CPCG01M9/06G01M9/08G01M9/02
Inventor 解福田林敬周邹东阳钟俊赵健张庆虎
Owner 中国空气动力研究与发展中心超高速空气动力研究所
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