基于流固耦合理论的渣浆泵叶轮结构分析

Structure Analysis of Slurry Pump Impeller based on Fluid-structure Interaction Theorem

为准确得到渣浆泵叶轮的结构性能,采用了Fluent软件与多物理场协同仿真平台ANSYS Workbench。基于Fluent软件,应用N-S控制方程与RNGκ-ε模型对叶轮进行了三维流动计算,采用单向流固耦合技术对渣浆泵叶轮结构进行了仿真计算,获得了叶轮在不同工况下的等效应力及变形情况。计算结果表明,叶轮的最大危险区域为叶片进口与盖板结合处,存在应力集中现象;叶轮变形的总位移随半径的增大不断变大,并在叶轮边缘达到最大值。计算结果为渣浆泵叶轮的结构优化设计提供了数值依据。

To obtain the precise structural strength performance of the impeller of slurry pump in operation, the Fluent software and the multi-physical fields simulation platform-ANSYS Workbench were adopted. Three dimensional flow was simulated by the impeller basis of Fluent, N S equations and RNGκ-ε model The equivalent stress and deformation of slurry pump impeller at different operation conditions were obtained through the numerical simulation of impeller structure which was carried out by the one way fluid-structure interaction technique. The calculation showed that the most dangerous zone of the impeller designed was the connecting position between the inlet of impeller and cover plate when the stress was concentrated. The total displacement of the distortion increased constantly as the radius increasing and it reached the maximum val ue at the edge of the impeller. The results could be used to provide numerical basis for structural optimal design of slurry pump impeller.