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Effect of inclined trailing edge of blade on exterior radiation noise of marine centrifugal pump |
Wang Yong,Huang Haoqin, Liu Houlin, Wang Wenbo, Guo Bao |
National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract In order to analyze the effect of inclined trailing edge of blade on the exterior radiation noise of marine centrifugal pump,a 125CLLA-13 type marine centrifugal pump was chosen as the research object. The blade with inclined trailing edge and the blade without inclined trailing edge were used in the unsteady numerical simulation of the pump′s whole flow passage respectively. Then the pressure fluctuation of the wall of volute and leakage flow was obtained as the vector load.By loading the vector as the vibration source,the simulation of vibration based on modal response were conducted, and the vibration experiment of the pump without inclined trailing edge was done to verify the feasibility of simulation of noise of vibration. The further work was to simulate and analyze the exterior radiation noise of the model pump with different blade styles based on the acoustic-vibro coupling method.The results show that the changing trend of the sound power spectrum of the two blade styles is consistent at the same condition, but the LW of the blade with inclined trailing edge is obviously less than the other one. The maximum LW is at the BPF, and the design condition has the minimum value of LW at the BPF,the small flow rate condition has the maximum value of LW at the BPF.The exterior radiation noise of centrifugal pump has certain dipolarity and directivity,and the inclinded trailing edge of blade can reduced the sound pressure at the directivity field point.The minimum of sound pressure is at the design condition,and the maximum is at the small flow rate condition. Considering the terms of vibration and noise reduction,the blade with inclined trailing edge is superior to the blade without inclined trailing edge.The research results are useful for the vibration and noise reduction design of the marine centrifugal pump.
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Received: 01 July 2014
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[1]黄国富,常煜,张海民,等.低振动噪声船用离心泵的水力设计[J].船舶力学,2009,13(2):313-318. Huang Guofu, Chang Yu, Zhang Haimin, et al. Hydraulic redesign on a marine centrifugal pump for hydro-borne vibration and noise reduction[J]. Journal of Ship Mechanics,2009,13(2):313-318.(in Chinese)[2]Langthjem M A,Olhoff N. A numerical Study of Flow-induced noise in a two-dimensional centrifugal pump [J]. Journal of Fluids and Structures, 2004,19(3):349-368.[3]Schmitz S.Reducing pump noise in cooling tower applications[J].World Pumps,2004, 456:24-29.[4]Khelladi S, Kouidri S, Bakir F, et al. Predicting tonal noise from a high rotational speed centrifugal fan[J].Journal of Sound and Vibration, 2008, 313(1/2): 113-133.[5]Wolfram D, Carolus T H. Experimental and numerical investigation of the unsteady flow field and tone generation in an isolated centrifugal fan impeller[J].Journal of Sound and Vibration,2010,329(21):4380-4397.[6]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 Jiangping, et al. Experimental study on impact of pressure fluctuation on flow-noise in centrifugal pump[J]. Drainage and Irrigation Machinery, 2009,27(5):287-290.(in Chinese)[7]Yuan S, Yang J, Yuan J, et al. Experimental investigation on the flow-induced noise under variable conditions for centrifugal pumps[J]. Chinese Journal of Mechanical Engineering,2012,25(3):456-462.[8]Choi J S, McLaughlin D K, Thompson D E. Experiments on the unsteady flow field and noise generation in a centrifugal pump impeller[J]. Journal of Sound and Vibration, 2003,263(3):493-514.[9]谈明高,王勇,刘厚林,等.叶片数对离心泵内流诱导振动噪声的影响[J].排灌机械工程学报,2012,30(2): 131-135. Tan Minggao, Wang Yong, Liu Houlin, et al.Effects of number of blades on flow induced vibration and noise of centrifugal pumps[J].Journal of Drainage and Irrigation Machinery Engineering,2012,30(2):131-135.(in Chinese)[10]刘厚林,王勇,袁寿其,等.叶轮出口宽度对离心泵流动诱导振动噪声的影响[J].华中科技大学学报:自然科学版,2012,40(1):123-127. Liu Houlin, Wang Yong, Yuan Shouqi, et al.Effects of impeller outlet width on the vibration and noise from centrifugal pumps induced by flow[J].J Huazhong Univ of Sci & Tech: Natural Science Edition,2012,40(1):123-127.(in Chinese)[11]王勇,刘厚林,袁寿其,等.不同叶片包角离心泵空化振动和噪声特性[J].排灌机械工程学报,2013,31(5):390-393. Wang Yong, Liu Houlin, Yuan Shouqi, et al. Characteristics of cavitation vibration and noise in centrifugal pumps with different vane wrap angles[J]. Journal of Drainage and Irrigation Machinery Engineering,2013,31(5):390-393.(in Chinese)[12]Lighthill M J. On sound generated aerodynamically: I.General theory[C]//Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1952, 211(1107):564-587.[13]Kato C, Kaiho M, Manabe A. An overset finite-element large-eddy simulation method with applications to turbomachinery and aeroacoustics[J]. Journal of Applied Mechanics, 2003,70(1):32-43.[14]Lu F A, Qi D T, Wang X J,et al. A numerical optimization on the vibroacoustics of a centrifugal fan volute[J]. Journal of Sound and Vibration, 2012,331(10):2365-2385.[15]王勇,刘庆,刘东喜,等.不同叶片冲角离心泵内流诱导振动噪声研究[J].流体机械,2013,41(7):1-4. Wang Yong,Liu Qing,Liu Dongxi,et al.Analysis of flow induced vibration and noise in centrifugal pumps with different blade inlet incidence angle[J].Fluid Machi-nery,2013,41(7):1-4.(in Chinese)[16]Parrondo J,Pérez J, Barrio R,et al. A simple acoustic model to characterize the internal low frequency sound field in centrifugal pumps[J]. Applied Acoustics,2011,72(1):59-64.[17]刘厚林,丁剑,王勇,等. 基于大涡模拟的离心泵水动力噪声数值模拟[J]. 机械工程学报,2013,49(18):177-183. Liu Houlin, Ding Jian, Wang Yong, et al. Numerical simulation of hydrodynamic noise in centrifugal pump based on LES[J].Journal of Mechanical Engineering, 2013, 49(18):177-183.(in Chinese)[18]杨爱玲,徐洋,李国平,等. 叶片载荷对离心泵内流动激励力及噪声的影响[J].排灌机械工程学报,2014, 32(1): 27-32. Yang Ailing, Xu Yang, Li Guoping, et al. Effect of blade loading on fluid-induced exciting force and noise in centrifugal pumps[J]. Journal of Drainage and Irrigation Machinery Engineering,2014,32(1):27-32.(in Chinese) |
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