变厚度叶片对离心压缩机结构强度和性能影响

以国内某大流量离心式压缩机首级叶轮为研究对象,采用数值模拟方法研究了变厚度叶片对离心压缩机结构强度和性能的影响.应用CAD软件Solidworks对9种变厚度叶片的闭式叶轮进行三维实体造型,运用有限元软件ANSYS进行静态应力分析,并利用计算流体动力学软件CFX进行叶轮内部流场分析.重点比较分析了叶轮最大von Mis...

Influence of variable-thickness blade on structural strength and performance of centrifugal compressor

A systematic investigation to understand the impacts of the variable-thickness blade on the structural strength and performance of the first stage impeller for a domestic large flow centrifugal compressor is undertaken.The geometric models of 9 shrouded impellers with variable-thickness blade are mainly established by CAD software Solidworks,static structural analyses are carried out using finite element software ANSYS,and CFD simulations are performed with the CFX code.Emphases are placed on the variation of maximal von Mises stress in FEM analyses,and the distinction of impeller internal flow behavior in CFD simulations.The variable thickness of blade is found to exert the great influence on the structural strength and performance of a centrifugal compressor.Furthermore,the computational results indicate that the appropriate increase of blade thickness close to trailing edge can remarkably improve the strength and aerodynamic characteristics of a shrouded impeller.Finally,the theoretical bases are given for the structural optimization and the performance improvement of a large flow centrifugal compressor and a nuclear reactor coolant cycling pump impellers.