冲压焊接多级离心泵叶轮内部流场的计算机辅助分析  

COMPUTER-AIDED ANALYSIS ON INNER FLOW IN STAMPING AND WELDING MULTISTAGE CENTRIFUGAL PUMP'S IMPELLERS

作　　者：刘元义[1] 王广业[2] 

机构地区：[1]山东理工大学机械工程学院,淄博255049 [2]日照职业技术学院机械电子工程系,日照276826

出　　处：《机械工程学报》2007年第8期207-211,共5页Journal of Mechanical Engineering

摘　　要：基于时均N-S方程、标准κ-ε湍流模型和壁面函数法,在旋转坐标系中利用SIMPLE算法,对圆柱型、机翼型和堵塞流道型三种类型叶片的冲压焊接多级离心泵叶轮内部三维湍流流动进行数值计算与分析。研究冲压焊接多级离心泵叶轮叶型对流速分布、压力分布和泵性能的影响规律,揭示离心泵叶轮通道内部流动的主要特征。利用计算流体动力学(CFD)商用软件ANSYS CFX的数值计算结果,得到了三种类型叶片的叶轮在设计工况下的效率,并与相关的试验数据进行了比较。预测结果与相关的试验数据相吻合,验证了利用ANSYS CFX对冲压焊接多级离心泵叶轮内部流场进行数值模拟的可行性和有效性,减少了对试验数据和设计经验的依赖,为冲压焊接多级离心泵叶轮方案的优化和选择提供参考。Based on rotational coordinates, the Renault-averaged Navier-Stokes equations, with a standard κ-ε turbulence model and wall function, are used to simulate three-dimensional turbulent flow within three different types of stamping and welding multistage centrifugal pump impellers （edge type, airfoil type and partly blocked-flow-passage type） by means of SIMPLE algorithm. The influence of blade profile on velocity distribution, pressure distribution and pump performance are investigated according to the computing results, then the principal character of internal flow in the impeller channels are opened out. The efficiencies of three different types of impellers on designed conditions calculated by means of commercial CFD software ANSYS CFX, are consistent with the correlative experimental data. Computer-aided analysis on internal flow field of these pump impellers can reduce dependence of experimental data and designed experiences, so it is helpful to optimize and select the design of stamping and welding multistage centrifugal pump impellers.

关 键 词：冲压焊接多级离心泵 叶轮 效率 计算机辅助分析 

分 类 号：TH313[机械工程—机械制造及自动化]