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| Internal flow field analysis and noise reduction means of BPX drain pump |
| Gao Bo1, Yang Minguan1, Wu Chengfu1, Chen Zhiwei2 |
| (1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Changzhou Leili Motor Science and Technology Co.Ltd., Changzhou,Jiangsu 213000, China) |
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Abstract In order to research the distribution law of noise sources induced by flow in pumps, the internal flow field in a typical BPX drain pump was simulated by computational fluid dynamics, and the distribution features of velocity, pressure and vorticity field at different running conditions were obtained. The computational results show that there is a low velocity fluid flow in the filter chamber. An unsymmetrical tangential vortex is observed around the back of the filter. Pump impeller inflow condition goes to worse due to sudden change of the flow passage section area before fluid flowing into the impeller. Flow in the outlet pipe separates, and consists of throughout and backflow with low velocity. Vorticity is concentrated in the impeller flow passage, especially around the hub, suction side of the impeller and impeller tips. A vorticity band also appears in the outlet pipe. Meanwhile, pump airborne nosie was also tested. Pump running process was divided into three steps, including startup, running and empty pumping. Noise features of three steps were obtained. Three typical noise reduction means were provided. It is considered that the means of adding backflow hole is more feasible.
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Received: 16 February 2011
Published: 30 September 2011
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| [1] 徐 超．滚筒洗衣机噪声控制研究［D］．镇江：江苏大学能源与动力工程学院，2007．[2] Kitano M．Numerical study of unsteady flow in a centrifugal pump[J]．Journal of Turbomachinery，2005，127(4)：363-371．[3] Parrondo J， Perez J， Barrio R，et al. A simple acoustic model to characterize the internal flow frequency sound field in centrifugal pumps[J]．Applied Acoustics，2011，72(1)：59-64．[4] Cudina M,Prezeli J．Detection of cavitation in situ operation of kinetic pumps: effect of cavitation on the characteristic discrete frequency component[J]．Applied Acoustics，2009，70(5)：1175-1182．[5] Cudina M,Prezeli J．Detection of cavitation in operation of kinetic pumps: use of discrete frequency tone in audible spectra[J]．Applied Acoustics，2009，70(4)：540-546．[6] Xavier E， Eduard E， Mohamed F，et al. Detection of cavitation in hydraulic turbines[J]．Mechanical Systems and Signal Processing，2006，20(4)：983-1007．[7] 李 兵．BPX型洗衣机排水泵内流分析及优化方案探讨［D］．镇江：江苏大学能源与动力工程学院，2010．[8] 国家标准局． GB/T 4288—2008 家用和类似用途电动洗衣机［S］．北京：中国标准出版社， 2008．[9] 金 燕，刘 超，汤方平．灯泡贯流泵装置内部流动数值模拟[J]．排灌机械工程学报， 2010，28(2) ：155-159．Jin Yan，Liu Chao，Tang Fangping．Numerical simulation of internal flow of tubular pump system[J]．Journal of Drainage and Irrigation Machinery Engineering,2010，28(2)：155-159．(in Chinese)［10］ Tsutomu K．Theory of vortex sound with special reference to vortex rings［C］∥Proceedings of the International Conference on Mathematical Fluid Dynamics．India：University of Hyderabad，2004．［11］ 邓寅喆，陈慧宝．全自动洗衣机的噪声控制研究[J]．噪声与振动控制，2001(4)：44-48．Deng Yanzhe，Chen Huibao．Research of the noise control for the automatic washing machine[J]．Noise and Vibration Control，2001(4)：44-48．(in Chinese) |
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