基于CFD的船用离心泵水动力振动噪声源分析(黄国富; 常煜; 张海民)

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【作者】黄国富; 常煜; 张海民 【作者单位】中国船舶科学研究中心水利论文/jA'Hg/X

+{y7k'l'U(?0【论文摘要】 某型船用离心泵在实际运行过程中产生了较大的振动噪声,为控制振动噪声需要分析其产生原因。本研究应用 CFD 技术对该泵内的整体三维流动进行了数值模拟。基于 CFD 计算结果分析,深入剖析了该船用离心泵的水动力振动噪声源,主要为泵内存在大幅压力脉动、回流等不良流动以及汽蚀,分析结果得到了基于试验台架的实泵声源级水动力噪声试验结果的验证。

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S)Z P\&@0【英文论文摘要】 A marine centrifugal pump generates serious vibration and noise during operating.In order to reduce the vibration and noise,it is necessary to verify sources of the vibration and noise before redesign work.The 3-D flow field of the pump is investigated by CFD.The internal flow is modeled by RANS equations with SST k-ω turbulence model.Based on the results from the internal flow field computation,possible noise generation mechanisms of hydrodynamic aspects are revealed.Accordingly,the main hydrodynamic sources of the pump's vibration and noise are pressure fluctuation,backward flow or flow fluctuation,and cavitations occurred in the pump. Moreover,all of above sources are owing to improper design of impeller and volute.The results are verified by prototype pump acoustic tests under laboratory conditions.

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【论文关键词】 离心泵; CFD; 水动力; 振动噪声
C4g v j3\A$HH.J0【英文论文关键词】 centrifugal pump; CFD; hydrodynamics; vibration and noise水利论文wQ8e}:R j GA

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TAG: CFD 张海民 噪声源 常煜 黄国富
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