### 高马赫数下横/逆向喷流干扰流场数值研究-2021增刊

1. 北京航空航天大学
• 收稿日期:2021-09-10 修回日期:2021-10-13 出版日期:2021-10-18 发布日期:2021-10-18
• 通讯作者: 徐旭

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

• Received:2021-09-10 Revised:2021-10-13 Online:2021-10-18 Published:2021-10-18

Abstract: Transverse and opposing jets are widely used in aerodynamic and aerothermal control on hypersonic vehicles. This paper numerically investigated jet interferences on a two-dimensional cylindrical vehicle at high altitude under high Mach number and finite volume method in the cell-centered scheme was employed to solve Navier-Stokes equations based on three-temperature thermochemical nonequilibrium model. The flowfield structures with only transverse or reverse jet and both the two jets and the influence of jet interaction on heat flux reduction, drag reduc-tion 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 vehicle. The lift charac-teristic of hypersonic vehicle can be improved by transverse jet flow. In the case that the lateral jet has been used for aircraft attitude control, the reverse jet can be used simultaneously under certain conditions, which can not only reduce drag and peak heat flux, but also increase lift.