摘要
为解决和预测固体颗粒对超高速离心叶轮的冲击磨损问题,以多相流理论为基础,采用了雷诺应力模型结合颗粒轨道模型的方法,通过对超高速离心叶轮内气固两相湍流场的计算,得到了颗粒在叶轮中的运动轨迹;并用CFX对不同粒径的固体颗粒在超高速离心叶轮内部流场中的运动轨迹进行了数值模拟。模拟结果与已有实验结果吻合,说明采用雷诺应力湍流模型能准确描述超高速离心叶轮中固体颗粒的运动轨迹。
Aiming to resolve and predict the impact wear of extra-high speed centrifugal impellers by particles,based on the theory of multiphase flow,the Reynolds stress model and the particle track model were adopted to compute the flow filed of the gas-solid two-phase flow in the extra-high speed centrifugal impellers,then the movement tracks of particles were obtained that passed through the impellers,and the tracks of particles were simulated by using the CFX.The results of numerical simulation fit well with the experimental values.The conclusions show that Reynolds stress model can be used to describe the tracks of particles in the extra-high speed centrifugal impeller accurately.
出处
《机电工程》
CAS
2010年第8期43-47,共5页
Journal of Mechanical & Electrical Engineering
关键词
超高速离心叶轮
雷诺应力模型
颗粒
轨迹
数值模拟
extra-high speed centrifugal impeller
reynolds stress model
particle
track
numerical simulation
