某型发动机尾流场热环境测量及数值模拟研究

摘要

Experimental and numerical investigations of a liquid rocket engine's tail field are conducted. The simulation is evaluated by comparison with the experimental results. The results show that the prediction accuracy of temperature field can be improved by using radiation model, the solid radiation of engine's wall and gas radiation constitute the front part of engine's radiation field, while the gas radiation plays the important role far from the engine, and P1 model can predict the tail's radiation fields of the rocket engine effectively.%对某型液体火箭发动机的尾流温度场及辐射场进行测量,采用计算流体力学技术对尾流场进行数值模拟,仿真结果同试验结果进行对比分析.结果表明:加载辐射模型后尾流温度场的预测更准确,发动机前部辐射场由喷管外壁的固体辐射及燃气的气体辐射构成,而远离发动机的区域主要气体辐射构成,P1模型可以有效预测液体火箭发动机尾流辐射场.