Numerical simulation of the thermal non-equilibrium flow-field characteristics of a hypersonic Apollo-like vehicle  

作　　者：Minghao Yu Zeyang Qiu Bo Lv Zhe Wang 喻明浩;邱泽洋;吕博;王哲(Faculty of Mechanical and Precision Instrument Engineering,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]Faculty of Mechanical and Precision Instrument Engineering,Xi'an University of Technology,Xi'an 710048,China

出　　处：《Chinese Physics B》2022年第9期376-385,共10页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.12175177);the China Postdoctoral Science Foundation(Grant No.2021M693889)。

摘　　要：In order to investigate the relationship between the flow-field parameters outside the vehicle and the altitude,this paper takes the Atmospheric Reentry Demonstrator(ARD)with an angle of attack of-20°as the research object and adopts a two-temperature model coupled with the shear-stress transport k-ωturbulence model to focus on the variation of flow-field parameters including flow-field pressure,Mach number and temperature with the reentry altitude.It is found that the flow-field high-pressure region and low-Mach region both appear in the shock layer near the head of the ARD,while the maximum pressure of the surface appears on the windward side of the ARD's head with a toroidal distribution,and the numerical magnitude is inversely proportional to the radius of the torus.With fluid through the shoulder of the ARD flow expansion plays a dominant role,the airflow velocity increases,the Mach number of the windward side of the rear cone increases and the flow-field pressure and surface pressure rapidly decrease.When the fluid passes through the shock layer,the translational-rotation temperature will increase before the vibration-electron temperature,there is a thermal non-equilibrium effect and the two temperatures will rapidly decrease again when approaching the surface of the ARD due to the existence of temperature gradient.At the same time,both the windward side of the shoulder and the back cover of the ARD suffer from a large thermal load and require thermal protection.

关 键 词：atmospheric reentry demonstrator reentry altitude flow-field characteristics two-temperature model 

分 类 号：V411[航空宇航科学与技术—航空宇航推进理论与工程]