Abstract:In order to research the change rules of vibration and noise of the double-suction pump, an hybrid algorithm based on computational fluid dynamic and LMS Virtual-Lab was adopted to calculate the inner sound field of the pump. The three-dimensional unsteady flow was calculated based on k-ε turbulence model, the pressure fluctuation of blade and volute surface was extracted as a dipole source when it become a main source of the flow-induced noise. Based on the LMS Virtual-Lab acoustic simulation, the direct boundary element method was applied to numerical simulation and analysis in order to calculate sound pressure level distribution of the acoustic boundary element sound model surface and sound pressure vibration with the change of the frequency. The results show that blade passing frequency and multiple frequency are the main frequency of the flow-induced noise, and there is the maximum value of sound pressure of the blade and volute in the condition of blade passing frequency. Even if a peak value appears in the multiple frequency,with the increase of frequency,the sound pressure of flow-induced is dramatically reduced. The results provide some useful references for low noise and vibration of pump as hydraulic turbine.
夏勇, 王春林, 杨晓勇, 叶剑, 曾成. 双吸泵作液力透平内部流动诱导噪声数值分析[J]. 排灌机械工程学报, 2016, 34(6): 483-489.
XIA Yong, WANG Chunlin, YANG Xiaoyong, YE Jian, ZENG Cheng. Numerical investigation of noise induced by internal flow of double-suction pump as hydraulic turbine. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(6): 483-489.
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