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Effects of boundary-layer bleeding on unstart oscillatory flow of hypersonic inlets

Published online by Cambridge University Press:  03 February 2016

Y. Fan ,
J. Chang ,
W. Bao  and
D. Yu
Y. Fan
Affiliation:
changjuntao@hit.edu.cn
J. Chang
Affiliation:
changjuntao@hit.edu.cn
W. Bao
Affiliation:
baowen@hit.edu.cn
D. Yu
Affiliation:
Harbin Institute of Technology, China
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Abstract

The unsteady flowfield of a series of mixed-compression hypersonic inlets with different bleeding rates were numerically simulated. Firstly unstart oscillatory flow of hypersonic inlets caused by downstream massflow choking was discussed. Then the effects of boundary layer bleeding on the averaged performance parameter of hypersonic inlets, and on the dominant amplitude and frequency of unstart oscillatory flow of hypersonic inlets were presented. The reasons why the boundary-layer bleeding can suppress unstart oscillatory flow of hypersonic inlets were analysed. In conclusion, the averaged performance parameter of hypersonic inlets during a big buzz is improved greatly, and the dominant frequency of unstart oscillatory flow of hypersonic inlets is reduced in contrast with no bleeding, and all these are benefit to the design and operation of hypersonic inlets.

Type
Research Article
Information
The Aeronautical Journal , Volume 114 , Issue 1157 , July 2010 , pp. 445 - 450
Copyright
Copyright © Royal Aeronautical Society 2010 

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