燃气非平衡流再生冷却流动传热数值模拟

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。

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

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 s...