叶片扩压器内两相流场的数值模拟  

Numerical Simulation of Two-Phase Flow in Impeller

作　　者：曾卓雄[1] 胡春波[2] 姜培正[3] 

机构地区：[1]南昌航空工业学院机械系,江西南昌330034 [2]西北工业大学,陕西西安710072 [3]西安交通大学,陕西西安710049

出　　处：《航空动力学报》2002年第3期319-322,共4页Journal of Aerospace Power

摘　　要：湍流模型采用 kk-εk-θp 模型 ,为改善计算的稳定性和收敛性 ,根据 Rhie,Chow提出的动量插值概念 ,以协变物理速度分量作为求解变量 ,在压力修正方程中考虑了密度及浓度修正的影响 ,完成了叶片扩压器内部的两相流场的数值计算 ,计算结果与实际情况较为吻合 ,表明了所建立的计算方法的可行性。结果表明 :叶片扩压器吸力面上的颗粒拟温度高于压力面上的颗拟温度 ,而且靠近壁面处的大于叶道中的 ,可采用颗粒拟温度来标志磨损部分。The pressure correction equations of particle kinetic pressure and fluid pressure are established in which correction of particle volumetric fraction and fluid density is considered.The turbulent flow is represented by k k ε k θ p model,and the principle of momentum interpolation was applied to the covariant physical velocity components,which were chosen as the dependent variables in the simulation of the two phase flow field of impeller.It is shown that the calculations agree well with the practical matter,and the simulation method is performable.Also,it is shown that pseudothermal temperature on tension side is smaller than that on suction side,and pseudothermal temperature near wall is greater than that in the interior,Furthermore,pseudothermal temperature can be used to describe abrasion level.It supplies foundation for efficient design and property of blade pressure expander.

关 键 词：叶片扩压器 流场 数值模拟 两相流 

分 类 号：O359[理学—流体力学]