高温高压超音速气液两相流场数值模拟

采用欧拉-拉格朗日方法对燃气-蒸汽发射动力装置内高温高压超音速燃气中的横向喷雾的气液两相流进行了数值模拟研究，气相采用RK-AUSM+格式求解N-S方程，液相应用颗粒轨道模型，两相之间的耦合通过在气相各守恒方程中添加源项来实现。针对不同的喷水孔径、喷水压差以及水汽质量比进行了数值模拟计算，分析了各种条件下的液滴蒸发情况以及对气相流场和能量输出的影响，为燃气-蒸汽发射动力装置的设计优化和能量调节技术提供了理论依据

Numerical simulation of gas-liquid two phase flow in a high temperature and high pressure supersonic cross flow

An Euler-Lagrange method was used to describe gas-liquid two phase flow in high temperature and high pressure supersonic cross flow of gas-steam launching system. The gas phase flow field is simulated by solving the Navier-Stokes equations using RK(Runge-Kutta)-AUSM+(Advection Upstream Splitting Method) scheme. A particle trajectory model was used to represent the liquid phase. The source terms were added to the gas phase conservation equations to simulate the couple of the two phases. Several applications are calculated to analyze the droplet evaporation and the influence on gas flow field and energy output. The conclusions are useful to design and optimize the gas-steam launching system and energy regulation.