脉动标量场的数值模拟

NUMERICAL MODELING OF FLUCTUATING SCALAR QUANTITIES

关键词:  紊流模型  内弹道数值解法  火箭发动机

Key words:  Turbulence model  Interior trajectory numerical computation  Rocket engine

摘要:

分析多元流体在湍流条件下的混合、传热或化学反应时需要考虑各组元的浓度、温度等标量参数的脉动.本文基于湍流模式理论,介绍标量参数的一种模化方法,并用该方法对流入静止环境的热射流进行了数值模拟.计算结果与实验数据进行了对比,表明该方法对算例条件下的温度场预测可以取得满意的结果.

Abstract:

To analyze the turbulent mixing, heat transfer or chemical reaction of multicomponent flow,it is essential to consider the fluctuation of scalar quantities such as concentrations, temperatures and so on.Based on the turbulent modeling theory,a model method is presented in this paper.Numerical calculations are conducted for a hot jet issuing into stagnant surrounding.The calculations, compared with the reported experimental data, show the satisfactory prediction of the temperature field.