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Numerical Investigation of the FSI Characteristics in a Tubular Pump

机译：管状泵中FSI特性的数值研究

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摘要

Flow condition was simulated in a shaft tubular pump by using the Shear-Stress Transport (SST) k-omega turbulence model with high quality structured grids in design condition. Corresponding structural vibration characteristics were then analyzed based on two-way coupled Fluid-Structure Interaction (FSI) method. Fluid results showed that flow in the outlet flow passage was a combination of the axial flow and circumferential rotation motion. Time and frequency domain analysis of pressure pulsation of typical measure points indicated that larger pulsation amplitudes appeared in the tip of the blades and the main vibration source was the pressure pulsation induced by rotation of the blades. The fluid pulsation amplitudes decreased gradually along the flow direction, which can be ascribed to the function of fixed guide vane. Structural analysis of the blades in both pressure and suction side indicated that significant stress concentration was formed at the blade and hub connection near the leading edge. Maximum effective stress of the blades varied periodically, so prevention measures of the fatigue of blades should be taken. This research can provide important reference for the design of the tubular pump.
机译：在设计条件下，通过使用具有高质量结构化网格的Shear-Stress Transport（SST）k-omega湍流模型，模拟了立式轴流泵中的流动条件。然后基于双向耦合流固耦合（FSI）方法分析了相应的结构振动特性。流体结果表明，出口流道中的流动是轴向流动和周向旋转运动的结合。典型测量点压力脉动的时域和频域分析表明，叶片尖端出现较大的脉动幅度，主要振动源是叶片旋转引起的压力脉动。流体脉动幅度沿流动方向逐渐减小，这可以归因于固定导向叶片的功能。对叶片在压力侧和吸力侧的结构分析表明，叶片和轮毂连接处的前缘附近形成了明显的应力集中。叶片的最大有效应力会定期变化，因此应采取防止叶片疲劳的措施。该研究可为管状泵的设计提供重要参考。

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  • 来源
    《Mathematical Problems in Engineering》 |2017年第7期|7897614.1-7897614.9|共9页
  • 作者

    Wang Shuo; Zhang Liaojun; Yin Guojiang;

  • 作者单位

    Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China;

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