燃气非平衡流再生冷却流动传热数值模拟

推进技术 ›› 2011, Vol. 32 ›› Issue (1): 119-124.

燃气非平衡流再生冷却流动传热数值模拟

康玉东,孙冰

北京航空航天大学宇航学院,北京 100191;北京航空航天大学宇航学院,北京 100191

发布日期:2021-08-15
作者简介:康玉东(1985—),男,博士生,研究领域为火箭发动机热防护。E-mail:kyd@sa.buaa.edu.cn

Numerical simulation of regeneraive cooling flow and heat transfer with nonequilibrium flow

School of Astronautics, Beijing Univ. of Aeronautics and Astronautics, Beijing 100191, China;School of Astronautics, Beijing Univ. of Aeronautics and Astronautics, Beijing 100191, China

Published:2021-08-15

摘要/Abstract

摘要： 为准确预测液体火箭发动机推力室身部再生冷却换热状况,采用数值模拟方法,对燃气、推力室壁和超临界气氢进行三维流动和换热耦合计算。采用6组分9步反应动力学模型计算燃气的非平衡化学反应,采用DO模型计算燃气辐射换热,考虑超临界气氢物性随温度和压力的变化。获得了室壁温度场、燃气及冷却剂流场。结果表明,Redlich-Kwong方程、Peng-Robinson方程、Lucas法、TRAPP法能分别准确计算超临界氢的密度、定压比热容、粘度、导热系数,采用燃气非平衡流计算所得流场值更符合实际情况。

关键词: 再生冷却;化学非平衡流;流动;传热;数值仿真

Abstract: To better predict the regeneratively cooled liquid rocket engine thrust chamber heat transfer. Three dimensional numerical simulation was carried out for hot gas,solid wall and coolant coupled flow and heat transfer.The 9 steps with 6 specices chemical reaction model was used to simulate gas non-equilibrium chemical reactions. The radiative heat transfer was simulated with DO model.The coolant is supercritical hydrogen whose thermophysical properties are varied with both temperature and pressure.The results show that Redlich-Kwong equation of state,Peng-Robinson equation of state,Lucas method,TRAPP method can be used to predict hydrogen density,specific heat at constant pressure,viscosity,thermal conductivity,respectively.The simulated results using non-equilibrium flow are more accordant with real condition. 

Key words: Regenerative cooling;Nonequilibrium flow; Fluid flow;Heat transfer;Numerical simulations

康玉东,孙冰. 燃气非平衡流再生冷却流动传热数值模拟[J]. 推进技术, 2011, 32(1): 119-124.