摘要
利用叶轮机械内Ｓ１、Ｓ２流面迭代方法对离心叶轮机械内气体流场进行数值分析，提出了用三维有限元数值插值技术和四阶Ｒｕｎｇｅ－Ｋｕｔａ法解高阶常微分方程组的新方法，并利用此方法求解离心叶轮机械内三维粒子的运动迹方程．以３００ＭＷ电站锅炉引风机为算例进行气固两相流数值分析，找出了不同颗粒粒径、进口位置对叶轮碰撞和磨损的影响，有助于以气动力学观点确定电站锅炉引风机防磨设计新方法．
The flow field in a rrotating cascade of a centrifugal turbomachine has been analyzed by using a unmerical iteration technique with S 1and S 2 streamsheets.Based on this,anew technique combiningthree-dimensional finite element interpolation and 4th rank RungeKutta method for high order ordinary differential equations is presented and used to solve the three-dimensional equations off motion of solid particles.The gas-solid two-phase flow field in an induced fan of 300MW plant boiler is numerically simulated.It also takes into consideration the influence of defferent particle's diameters and inlet positions on particle impingement,wear and tear with the blade surface and the turbomachine casing.It is helpful for designing the induced fan of plant boiler by avoiding wear and tear fron the gasdynamic point of view.
关键词
叶轮
气固两相流
鼓风机
数值解法
turbomachinery
gas-solid two-phase flow
finite elementt method
