摘要
针对燃气射流中的气固两相流动和燃气射流中固体颗粒对壁面的冲刷作用,从耦合固体颗粒源相作用的雷诺平均N-S方程出发,燃气相采用有限体积法,固体颗粒相采用拉格朗日轨道模型,计算了燃气射流的气固两相流场,并分析不同直径的固体颗粒在流场中的轨迹及速度。在数值模拟的基础上,采用条件相似的估算方法估计固体颗粒对置于燃气射流流场中壁面的冲刷作用,分析了固体颗粒在不同直径和不同分布组合情况下对壁面冲刷位置及冲刷程度的影响。结果表明,固体颗粒的直径大小,对颗粒轨迹影响很大,直径小的颗粒轨迹与流场流线吻合的较好,直径大的颗粒因惯性作用与流线吻合差;不同固体颗粒的组合,对壁面机械冲刷位置和程序有较大影响。
Numerical simulation was conducted to study gas-solid two-phase jet flow and erosion caused by solid particles. A finite volume scheme for a Reynolds-averaged Navier-Stokes equation of gas phase and a Lagrangian method for a solid phase were used to solve the coupled two-phase equation. The trajectory of different diameter solid particles was displayed in the flow field. Based on numerical results of simulation, the erosion of wall caused by different diameter and distrbution soled particles was investigated. The conclusions of this article indicated that the trajectories of solid particles were greatly influenced by the size of solid particles. The trajectories of smaller particles tally with streamline better. In contrast, The trajectories of the bigger particles tally with streamline worse because of inertial. The degree and position of mechanical erosion were influenced by the combination of different solid particles.
出处
《弹箭与制导学报》
CSCD
北大核心
2004年第1期63-66,共4页
Journal of Projectiles,Rockets,Missiles and Guidance
