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Numerical calculation of internal flow induced noise in centrifugal pump volute |
Yuan Shouqi, Si Qiaorui, Xue Fei, Yuan Jianping, Zhang Jinfeng |
(Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China) |
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Abstract An indirect method based on CFD and Lighthill sound analogy theory was adopted to solve the acoustic field of volute in centrifugal pumps for the complexity of the acoustic boundary conditions and high requirement of computational resources of the direct method. The DES method and S-A model were used to process threedimensional unsteady simulation. Dipole is the main noise source in pumps and the datum of pressure fluctuation were extracted from the CFD results as dipole input into SYSNOISE5.6 as the initial conditions. In acoustic simulation, the distribution graphs about dipole source and sound pressure can be got using DBEM. The results show that the distribution of the acoustic source which directly associate to the pressure fluctuation of the volute face generally aggregate at cutwater with the same frequency characteristic. Field sound pressure and dipole source do not have simple linear relationship and the strongest radiation intensity appears at blade passing frequency. Pipeline method applied in flow induced noise measurement is feasible and the flow rate is one of the major factors in acoustic radiation.
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Received: 10 January 2011
Published: 30 March 2011
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[1]Chu S,Dong R,Katz J. Relationship between unsteady flow,pressure fluctuations,and noise in a centrifugal pump. Part B: Effects of blade tongue interactions[J]. Journal of Fluids Engineering ,1995,117(1):30-35.[2]Morgenroth M,Weaver D S.Sound generation by a centrifugal pump at blade passing frequency[J]. Journal of Turbomachinery ,1998,120:736-743.[3]袁寿其,薛 菲,袁建平,等. 离心泵压力脉动对流动噪声影响的试验研究[J].排灌机械,2009,27(5):287-290.Yuan Shouqi,Xue Fei,Yuan Jianping,et al. Experimental study on impact of pressure fluctuation on flow noise in centrifugal pump[J]. Drainage and IrrigationMachinery ,2009,27(5):287-290.(in Chinese)[4]Bernd Dürrer,FrankHendrik Wurm. Noise sources in centrifugal pumps [C]∥Proceedings of the 2nd WSEAS Int Conference on Applied and Theoretical Mechanics,2006:203-207.[5]Langthjem M A,Olhoff N. A numerical study of flow induced noise in a twodimensional centrifugal pump[CD1]PartⅡ:Hydroacoustics[J]. Journal of Fluids andStructures ,2004,20(3):369-386.[6]Jiang Y Y,Yoshimura S,Imai R,et al. Quantitative evaluation of flowinduced structural vibration and noise in turbomachinery by fullscale weakly coupledsimulation[J]. Journal of Fluids and Structures ,2007,23(4):531-544.[7]Sergey Timushev. Development and experimental validation of 3D acousticvortex numerical procedure for centrifugal pump noise prediction[C]∥ Proceedings ofASME Fluids Engineering Division Summer Meeting ,2009: 389-398.[8]Ohashi H. Vibration and Oscillation of Hydraulic Machinery [M]. Aldershot: Cambridge University Press,1991.[9]孙晓峰,周 盛. 气动声学[M]. 北京: 国防工业出版社,1994.[10]刘 克,吴 瑞. 船用机电设备流动噪声的数值仿真方法[J]. 舰船科学技术,2006,28(S2):40-46.Liu Ke,Wu Rui. Numerical methods for predicting flowinduced noise of marine mechanical devices[J]. Ship Science and Technology ,2006,28(S2):40-46.(in Chinese)[11] Howe M S. Acoustics of Fluid Structure Interaction [M]. Cambridge: Cambridge University Press,1998.[12]张兄文,李国君,李 军. 离心泵蜗壳内部非定常流动的数值模拟[J]. 农业机械学报,2006,37(6): 63-68.Zhang Xiongwen,Li Guojun,Li Jun. Numerical simulation of unsteady flow in centrifugal pump volute[J]. Transactions of the Chinese Society for Agricultural Machinery,2006,37(6):63-68.(in Chinese)[13]李增刚. SYSNOISE Rev 5.6详解[M]. 北京: 国防工业出版社,2005. |
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