【作者】 刘静； 徐旭；

【Author】 LIU Jing~1, XU Xu~1(1. Faculty 403, Beijing University of Aeronautics and Astronautics, Beijing 100083, China)

【机构】 北京航空航天大学宇航学院403教研室；

【摘要】 采用Eulerian-Lagrangian方法研究气液两相流动现象。气相控制方程为欧拉坐标系中的二维轴对称N-S方程,求解方法为隐式LU-SGS方法。液相采用轨道模型,其中考虑了液滴运动过程中的碰撞、破碎和蒸发等现象。求解过程中液相对气相的影响通过在气相N-S方程中添加源项来实现。为验证物理模型,对圆管内离心喷嘴逆向喷射的气液两相流动现象进行了数值模拟。计算结果给出了圆管内离心喷嘴逆喷的三种工况下的液滴运动轨迹,气相速度场、温度场、蒸汽的质量分数分布等。计算结果与文献中的实验数据相吻合。本文发展的计算方法和计算模型可应用于液体火箭发动机燃烧室内的喷雾两相流动及其它与气-液两相流相关的工程问题研究。更多还原

【Abstract】 Eulerian-Lagrangian method was adopted to analyse two-phase flow. Gas governing equations are two dimensional axisymmetric N-S equations in Eulerian coordinates, which were solved by implicit LU-SGS method. Trajectory model was adopted to analyse liquid-phase including the droplet collision, breakup and evaporation. The gas flow was influenced by the droplets by adding source terms to the N-S equations. In order to validate the model, a gas-droplet flow produced by a swirl atomizer in a circular duct was simulated by the numerical model. The droplet trajectories, gas velocity and temperature distribution, mass fraction of the fuel vapor were obtained from the simulation in three different conditions. The results were in good agreement with the experimental data given by reference. The simulation model can be used for the research of spray two-phase flow in a liquid rocket chamber and other relevant two-phase flow problems.更多还原