展向宽度对激波入射平板反射类型的影响

doi:10.7527/S1000-6893.2021.25927

Abstract

Abstract: Shock wave interference is a local interference phenomenon that needs to be considered in the pneumatic layout of hypersonic vehicle and the design of scramjet. When this phenomenon occurs, complex wave structures will be generated to affect the behavior characteristics of the flow field and then significantly affect the planeload and engine performance. Numerical simulation is used to study the problem of incident shock wave of a plate. Under the condition of constant Mach number 5 and unit Reynolds number 7.12×10⁶ m^-1, the types of shock reflection in six different states are studied by changing the transverse width of the upper and lower plates. The results show that the influence of lateral overflow on the reflection types of shock wave must be considered in the restricted space. With the broadening of the transverse width of the plate, the shock reflection type gradually changes from regular reflection to Mach reflection, and the length of Mach stem becomes longer and moves forward gradually until the inner channel is blocked and the detached shock wave is formed. The shock polar theory is also used to analyze the generation mechanism of the two shock interference types under the condition of a fixed shock angle. The analysis shows that with the increase of shock wave intensity, the two transmission shock pole curves move upward and shrink, which leads to the requirement for parameter matching of the flow field behind the wave. The shock reflection type gradually changes from regular reflection to Mach reflection, and the conclusion is consistent with the numerical calculation and wind tunnel test results.

Key words: transverse width, regular reflection, Mach reflection, shock polar curve, wind tunnel test

CLC Number:

V411

ZHANG Zhigang, ZHAO Jinshan, WANG Chengpeng, LUO Wanqing, LIAO Junhao, XIAO Yu, CHEN Ting, SU Siyao. Influence of spanwise width on reflection types of oblique shock wave incident plate[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(1): 625927-625927.

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Influence of spanwise width on reflection types of oblique shock wave incident plate

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