流体机械

2018, v.46;No.547(01) 46-51+5

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蜗壳式混流泵叶轮部件湿模态流固耦合分析
Fluid-structure Coupling Dynamic Analysis for the Impeller in a Mix Flow Pump

高海司;裴吉;袁寿其;王逸云;
GAO Hai-si;PEI Ji;YUAN Shou-qi;WANG Yi-yun;National Research Center of Pumps,Jiangsu University;

摘要(Abstract):

为了得到蜗壳式混流泵在水介质中的模态分布,以某型号混流泵为研究对象,通过ANSYS对其进行流固耦合分析,得到流体对叶轮的流固耦合作用力,并运用ANSYS WORKBENCH有限元软件和APDL命令流耦合的方法,分析叶轮部件的干模态和湿模态特性;针对叶轮部件是否施加预应力,研究预应力对叶轮部件的固有频率和振型的影响;并考虑叶轮部件材料属性,分析得出金属材料的杨氏模量对叶轮各阶固有频率的影响特征;在分析干湿模态时,分别加厚叶轮前后盖板厚度,计算结果表明:加厚后盖板厚度对提高各阶固有频率最明显。本文为研究混流泵的振动特性、优化结构设计提供了一定依据,为进一步的动力学分析提供了一定参考。
In order to investigate into the influence of the modal in water of a mixed flow pump,a certain type mix flow pump was selected as the computational model. Based on the fluid-structure coupling analysis,the fluid-structure coupling force is obtained.A series of numerical simulations are performed by the means of coupling WORKBENCH with APDL command with prestress and without prestress to compare the differences between water and air mode,aiming at analyzing the effects of the impeller's frequency. Considering the material properties,the natural frequency of the rotor will be enlarged with the increase of Young's modulus. In the analysis of frequency in water and air mode,it is identified that thickened shroud and hub have the same effect in vibration. But,thickened hub can improve natural frequency obviously. The research provides a certain basis for the studying of vibration characteristics and optimal structure design of mixed flow pump,which is beneficial for further study on more complicated dynamics analysis.

关键词(KeyWords): 混流泵;转子;模态分析;流固耦合;固有频率
mixed flow pump;rotor;modal analysis;fluid-structure interaction;natural frequency

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金青年基金项目(51409123);; 江苏省自然科学基金青年基金项目(BK20140554);; 江苏省青蓝工程(苏教师(2017)15);; 江苏大学“青年骨干教师培养工程”资助项目(江大校(2017)402号)

作者(Author): 高海司;裴吉;袁寿其;王逸云;
GAO Hai-si;PEI Ji;YUAN Shou-qi;WANG Yi-yun;National Research Center of Pumps,Jiangsu University;

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