Subsonic-transonic flow field ejection operating method for transient type subsonic-transonic-supersonic wind tunnel
A temporary flushing and sub-span technology, applied in the field of wind tunnel testing, can solve the problems of high front chamber pressure, excessive load, and difficulty in establishing complex model flow fields, and achieve the goals of reducing usage, expanding test capabilities, and reducing loads Effect
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[0022] The present invention is based on the structural characteristics of the temporary impulse sub-span super wind tunnel. During the sub-span blowing test, especially the high Mach number blowing from 0.8 to 1.2, when encountering airplane models with large lift surfaces, for example, in order to reduce the load and ensure the successful completion of the experiment , Inspired by supersonic ram ejection driving method, created a sub-cross-flow field ejection driving method.
[0023] In view of the characteristics of the AT-1 wind tunnel, the main pressure regulating valve (12) opens slowly, while the start valve (14) can be opened quickly under the traditional sub-span wind tunnel test press driving mode. When conducting a blowing test, generally first open the main air supply valve (15), open the main pressure regulating valve (12) to a proper preset position based on empirical values, and then open the start valve (14) to quickly establish a flow field. In the traditional st...
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