### 高马赫数下横/逆向喷流干扰流场数值研究

1. 北京航空航天大学 宇航学院, 北京 102206
• 收稿日期:2021-09-01 修回日期:2021-09-14 发布日期:2021-10-18
• 通讯作者: 徐旭 E-mail:xuxu@buaa.edu.cn

### Numerical study on transverse/opposing jet interaction flowfield under high Mach number

WU You, XU Xu, CHEN Bing, YANG Qingchun

1. School of Astronautics, Beihang University, Beijing 102206
• Received:2021-09-01 Revised:2021-09-14 Published:2021-10-18

Abstract: Transverse and opposing jets are widely used in aerodynamic and aerothermal control on hypersonic vehicles. To solve Navier-Stokes equations, this paper, based on three-temperature thermochemical nonequilibrium model, numerically simulated jet interferences on a two-dimensional cylindrical vehicle at high altitude under high Mach number by employing the finite volume method in the cell-centered scheme. The flowfield structures with only transverse/opposing jet and both the two jets and the influence of jet interaction on heat flux reduction, drag reduction and lift improvement were studied. By variable control, the effects of jet flow with different parameters (Mach number, static pressure) on flow field structure and aerodynamic force/heat of aircraft were explored. The results show that in some cases, the flowfield structure of the upstream opposing jet interaction can be influenced by the downstream transverse jet when both the two jets exist in hypersonic freestream. The opposing jet can significantly lower the drag of the hypersonic vehicle and reduce the peak wall heat flux on the head of the vehicle. The lift characteristic of hypersonic vehicle can be improved by the transverse jet flow. In the case that the transverse jet has been used for aircraft attitude control, the opposing jet can be simultaneously used under certain conditions, which can not only reduce drag and peak heat flux, but also increase lift.