文献类型： 外文期刊

第一作者： Gao, J. Y.

作者： Gao, J. Y.;Hou, Y. S.;Xi, S. Z.;Cai, Z. H.;Yao, P. P.;Shi, H. L.;Gao, J. Y.;Hou, Y. S.;Xi, S. Z.;Cai, Z. H.;Yao, P. P.;Shi, H. L.

作者机构：

期刊名称：6TH INTERNATIONAL CONFERENCE ON PUMPS AND FANS WITH COMPRESSORS AND WIND TURBINES (ICPF2013)

ISSN： 1757-8981

年卷期： 2013 年 52 卷

页码：

收录情况： SCI

摘要： Axial pumps play an important role in water supply and flood control projects. Along with growing requirements for high reliability and large capacity, the dynamic stress of axial pumps has become a key problem. Unsteady flow is a significant reason which results structural dynamic stress of a pump. This paper reports on a flow-induced dynamic stress simulation in an axial pump impeller at three flow conditions by using FEM code. The pressure pulsation obtained from flow simulation using CFD code was set as the force boundary condition. The results show that the maximum stress of impeller appeared at joint between blade and root flange near trailing edge or joint between blade and root flange near leading edge. The dynamic stress of the two zones was investigated under three flow conditions (0.8Q(d), 1.0Q(d), 1.1Q(d)) in time domain and frequency domain. The frequencies of stress at zones of maximum stress are 22.9Hz and 37.5Hz as the fundamental frequency and its harmonics. The fundamental frequencies are nearly equal to vane passing frequency (22.9Hz) and 3 times blade passing frequency (37.5Hz). The first dominant frequency at zones of maximum stress is equal to the vane passing frequency due to rotor-stator interaction between the vane and the blade. This study would be helpful for axial pumps in reducing stress, improving structure design and fatigue life.

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