关键词: 气流;混合;速度场;温度分布;辐射通量;数值分析

Abstract: The flow field,temperature field and radiation flux field formed by mixing the coaxial parallel cold air with hot gas in the pipe,caused by ejection of aeroengine exhaust gas into surrounding air, numerically calculated in this paper0It is based on physical principles instead of pure mathematical deduction, in order to analyse and explain the calculation results and to make the calculation results approach the experimental results properly.The flow field,temperature field and infrared radiation flux field have been studied by changing the ejection coefficient with numerical method. The results of numerical calculation are in good agreement with the data of experiment.

Key words: Gas flow,Mixing,Velocity field,Temperature distribution,Radiation flux,Numerical analysis