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<p>In order to reduce the vibration and noise caused by abnormal flow disorder during the rapid startup of centrifugal pump, transient characteristics numerical simulation based on blade trailing edge filing is proposed in this study. Two blade trailing edge filing schemes are designed according to the existing original trailing edge (OTE) pump: arc pressure side filing (APS) and arc suction side filing (ASS). The internal and external flow characteristics of OTE pump during startup were simulated by SST <i>k-ω</i> model and verified by experiment. On this basis, SST <i>k-ω</i> model is used to further simulate the radial force and flow characteristics of APS and ASS pump. And the simulation results show that the unsteady pressure fluctuation is effectively suppressed by filing the trailing edge of the blade. At rated speed, the amplitude of pressure fluctuation coefficient of APS pump and ASS pump at blade passing frequency decreased by 17.53% and 33.59%, respectively. During the startup process, the shaft power of ASS pump was significantly higher than that of the OTE pump, which corresponded to the maximum radial force impact of ASS pump on the shaft at the initial stage. However, in the stable fluctuation stage, the pressure pulsation rate of APS and ASS pump decreased by 23.5% and 32.2%, respectively. At the blade passing frequency, the radial resultant force amplitude of ASS pump decreased by 77.8%. The blade trailing edge filing has a strong inhibitory effect on the radial resultant force at the startup stage of centrifugal pump, especially the suction side filing. This study is of great significance to reduce the vibration and noise of centrifugal pump in practical engineering.</p>

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Influence analysis of blade trailing edge arc-shaped filing on starting performance of a centrifugal pump

  • 期刊论文

  • 发表日期：

    2025年3月5日

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  • Hongchang Ding,
  • Shijie Zhu,
  • Fei Ge,
  • Shaoliang Huang

摘要

In order to reduce the vibration and noise caused by abnormal flow disorder during the rapid startup of centrifugal pump, transient characteristics numerical simulation based on blade trailing edge filing is proposed in this study. Two blade trailing edge filing schemes are designed according to the existing original trailing edge (OTE) pump: arc pressure side filing (APS) and arc suction side filing (ASS). The internal and external flow characteristics of OTE pump during startup were simulated by SST k-ω model and verified by experiment. On this basis, SST k-ω model is used to further simulate the radial force and flow characteristics of APS and ASS pump. And the simulation results show that the unsteady pressure fluctuation is effectively suppressed by filing the trailing edge of the blade. At rated speed, the amplitude of pressure fluctuation coefficient of APS pump and ASS pump at blade passing frequency decreased by 17.53% and 33.59%, respectively. During the startup process, the shaft power of ASS pump was significantly higher than that of the OTE pump, which corresponded to the maximum radial force impact of ASS pump on the shaft at the initial stage. However, in the stable fluctuation stage, the pressure pulsation rate of APS and ASS pump decreased by 23.5% and 32.2%, respectively. At the blade passing frequency, the radial resultant force amplitude of ASS pump decreased by 77.8%. The blade trailing edge filing has a strong inhibitory effect on the radial resultant force at the startup stage of centrifugal pump, especially the suction side filing. This study is of great significance to reduce the vibration and noise of centrifugal pump in practical engineering.