Effects of Forward-Facing Cavity on Behaviors of Type IV

Journal of Propulsion Technology ›› 2016, Vol. 37 ›› Issue (1): 1-7.

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Effects of Forward-Facing Cavity on Behaviors of Type IV

Department of Modem Mechanics，University of Science and Technology of China，Hefei 230027，China,Department of Modem Mechanics，University of Science and Technology of China，Hefei 230027，China,Department of Modem Mechanics，University of Science and Technology of China，Hefei 230027，China and Department of Modem Mechanics，University of Science and Technology of China，Hefei 230027，China

Published:2021-08-15

带凹腔钝头体第IV类激波干扰特性研究

肖丰收,李祝飞,朱雨建,杨基明

中国科学技术大学近代力学系，安徽合肥 230027,中国科学技术大学近代力学系，安徽合肥 230027,中国科学技术大学近代力学系，安徽合肥 230027,中国科学技术大学近代力学系，安徽合肥 230027

作者简介:肖丰收，男，博士生，研究领域为高超声速空气动力学。
基金资助:
国家自然科学基金(11132010，11402263)。

Abstract

Abstract: The effects of blunt body with a forward-facing cavity on the unsteady behaviors of hypersonic type IV shock interaction were experimentally and numerically investigated . The results show that type IV shock interaction can be either steady or unsteady depending on the location of the oblique impinging shock/bow shock intersection point. Under the conditions within the current work，two different oscillation modes，namely high frequency forward-backward oscillation and low frequency up-down oscillation modes were observed. The numerical results agree fairly well with those of the experiments. The interaction between the supersonic jet and the forward-facing cavity plays a key role in the shock wave oscillations.

Key words: Hypersonic flow；Shock/Shock interaction；Blunt body with a forward-facing cavity；Oscillation modes

摘要： 采用激波风洞实验与数值模拟相结合的方法，对高超声速带凹腔钝头体的第IV类激波干扰非定常振荡特性进行了考察和分析。结果表明，随着入射激波与弓形激波相对位置的不同，第IV类激波干扰既可能出现稳定的波系干扰结构，也可能出现较为剧烈的非定常振荡现象。在实验条件下，观察到了高频前后振荡和低频上下振荡两种不同的振荡模式。数值模拟结果与实验吻合较好，超声速射流与凹腔的耦合作用在振荡过程中起到了关键作用。

关键词: 高超声速流动；激波/激波干扰；带凹腔钝头体；振荡模式

XIAO Feng-shou,LI Zhu-fei,ZHU Yu-jian,YANG Ji-ming. Effects of Forward-Facing Cavity on Behaviors of Type IV[J]. Journal of Propulsion Technology, 2016, 37(1): 1-7.

肖丰收,李祝飞,朱雨建,杨基明. 带凹腔钝头体第IV类激波干扰特性研究[J]. 推进技术, 2016, 37(1): 1-7.

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Effects of Forward-Facing Cavity on Behaviors of Type IV

带凹腔钝头体第IV类激波干扰特性研究

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