Effect of the inlet internal compression shock waves on restart characteristics of the hypersonic inlets

Jia Yinan; Zhang Qifan; Tong Xiaotong; Yue Lianjie; Zhang Xinyu

doi:10.11729/syltlx20190031

Volume 33 Issue 3

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Jia Yinan, Zhang Qifan, Tong Xiaotong, et al. Effect of the inlet internal compression shock waves on restart characteristics of the hypersonic inlets[J]. Journal of Experiments in Fluid Mechanics, 2019, 33(3): 60-67. doi: 10.11729/syltlx20190031

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Effect of the inlet internal compression shock waves on restart characteristics of the hypersonic inlets

doi: 10.11729/syltlx20190031

Jia Yinan^{1, 2, 3
,},
Zhang Qifan^{1
,
,},
Tong Xiaotong^{1, 2},
Yue Lianjie^{1, 2},
Zhang Xinyu^{1, 2}

1.
State key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2.
School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
3.
Beijing System Design Institute of Mechanical-electrical Engineering, Beijing 100854, China

Received Date: 2019-01-28
Rev Recd Date: 2019-04-18
Publish Date: 2019-06-25

Abstract

Abstract

The specific hypersonic inlet models have been tested at Ma=4.0 wind tunnel to enrich the understanding of the effect of expansion waves on the inlet shoulder and the different compression ways on the inlet restart characteristics. The cowl angle and the thickness of the boundary layer have been regarded as the key influence factors. Results show that the expansion waves originated from the shoulder accelerate the local flow velocity and decrease the static pressure, which promotes the separation to move downstream. Thus, the inlet restart capability can be enhanced. And the multiple noncoalesced cowl shock waves can also improve the two-dimensional inlet restart capability. Due to the obvious three-dimensional structure of the separation induced by the swept shock, the inlet restart performance of sidewall-compression inlet differs from that of the cowl compression inlet. For the un-restart inlet caused by aerodynamic throat choke, the sidewall-compression can enhance the inlet restart capability effectively compared to the cowl-compression.
- restart capability,
- expansion waves originated from the shoulder,
- sidewall compression,
- boundary layer thickness,
- geometric throat,
- aerodynamic throat

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References(23)

References

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