Effectiveness analysis of opposing jet thermal protection with hot fuel gas

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Shen, Bin Xian^1 ; Liu, Wei Qiang^1

Science and Technology on Scramjet Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha

410073, China^1

关键词: Effectiveness analysis;    Insulating capacity;    Reynolds average Navier-Stokes;    Shear-stress transport;    Surface heat fluxes;    Surface temperatures;    Thermal protection;    Thermal Protection System;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/6/062037/pdf
DOI  :  10.1088/1755-1315/267/6/062037

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The hot fuel gas generating with solid fuel was introduced to an opposing jet thermal protection system(TPS), saving the occupied space and reducing the weight of the gas supply system. In this study, the thermal protection performance of opposing jet TPS with hot fuel gas is investigated. The surface heat flux is initially obtained by solving the Reynolds-average Navier-Stokes(RANS) equations coupled with the Menter's shear stress transport (SST) model. Then, the obtained heat flux is loaded to the blunt body to solve the temperature distribution. The influence of the hot fuel gas on the opposing jet TPS was analyzed with different flying condition. Results show that the hot fuel gas reduces the insulating capacity of the opposing jet, but the peak heat flux exhibits a prominent reduction in contrast to that without injection. The surface temperature also reduces a lot even the hot fuel gas is adopted than that without injection. To obtain a good cooling efficiency, the jet pressure is enhanced. With a higher jet pressure, the surface heat flux, as well as the surface temperature, is reduced, and the similar cooling efficiency can be obtained compared to that with normal coolant.