In order to accurately calculate the stress and deformation of the stamping and welding impeller in the flow field, the numerical simulation of the impeller coupled system was carried out by the CAE co-simulation platform used for tile multi-physical fields-ANSYS Workbench, with one-way fluid-structure interaction method. Theresults showed that the stress of the impeller was markedly uneven and the local stress concentration appeared in each operation condition. The total displacement of the distortion increased continuously as the radius increasing and it reached the maximum value at the edge of the impeller. The maximum equivalent stress of impeller was 48.7 MPa under the low flow rate condition of 0.6 times of design discharge, and decreased continuously as the flow rate increasing. The greatest displacement of total deformation was 0.0234 mm under low flow rate operations, which decreased firstly and then increased, and it, reached the minimum value of 0.0170 mm at the larger flow rate operation of 1.2 times of design discharge. In order to enhance the reliability, the impeller should not be operated at the low flow rate condition as far as possible. The results can provide effective references to the structural design and analysis for the stamping and welding impeller.%为准确计算冲压焊接叶轮在流场中的应力及变形情况,借助计算机辅助工程(computer-aided engineering,CAE)多物理场协同仿真平台ANSYS Workbench,采用单向流固耦合方法对叶轮耦合系统进行仿真计算.结果表明,各工况下叶轮应力分布明显不均,并在局部出现应力集中.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.叶轮最大等效应力在0.6倍设计流量工况下为48.7 MPa,随流量的增大不断减小.叶轮总变形的最大位移在小流量工况下最大为0.0234mm,随流量的增大先减小后增大,并在1.2倍设计流量工况下出现最小值0.0170 mm.为提高叶轮可靠性,应尽量避免其在小流量工况下运行.计算结果为冲压焊接叶轮的结构设计及分析提供有效依据.
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