Effects of Centrifugal Pumps Outlet Angle on Flow Induced Vibration and Noise

Abstract:

In order to research the effects of impeller outlet angles on flow induced vibration and noise of centrifugal pumps, a single grade end suction centrifugal pump is employed as a research object. The outlet angles were varied from 33° to 29°and 37°, but the volute and the other geometric parameters keep constant. Based on the virtual instrument data acquisition system, pump product testing system and in the centrifugal pump closed experimental rig, the flow induced vibration and noise signals of model pump with different outlet angles in the full flow range are measured and analyzed. Experimental results show that the influence of flow induced vibration on volute is the largest. With the increase of impeller outlet angle, the variation tendency of vibration intensity for 4 measure points decrease. The vibration intensity of model pump gets the minimum value, when the outlet angle is 37°. Under different conditions, the shaft frequency peak of noise signal varied intricately with the increase of impeller outlet angle. When the outlet angle is 33°, the shaft frequency peak of the model pump is relatively small under each operating condition, and gets the minimum value at the design condition.

• Periodical: Applied Mechanics and Materials (Volumes 249-250)
• Pages: 460-465
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.249-250.460
• Online since: December 2012
• Authors: Yong Wang, Jian Wang, Dong Xi Liu, Hou Lin Liu
• Keywords: Centrifugal Pump, Experiment, Noise, Outlet Angle, Vibration

References

[1] J. Aihua, Z. Zhiyi, Z. Yi, Review and outlook of studying on noise of centrifugal pumps, Journal of Vibration and Shock, 30 (2011) 77-84.

[2] M. A. langthjem, N. olhoff, A numerical study of flow-induced noise in a two-dimensional centrifugal pump Part I: hydrodynamics, Journal of Fluids and Structures, 19 (2004) 349-368.

DOI: 10.1016/j.jfluidstructs.2004.01.003

[3] M. A. langthjem, N. olhoff, A numerical study of flow-induced noise in a two-dimensional centrifugal pump Part II: Hydroacoustics, Journal of Fluids and Structures, 19 (2004) 369-386.

DOI: 10.1016/j.jfluidstructs.2004.01.002

[4] G. Rzentkowski, S. Zbroja, Experimental characterization of centrifugal pumps as an acoustic source at the blade-passing frequency, Journal of Fluids and Structures, 14(2000) 529-558.

DOI: 10.1006/jfls.1999.0280

[5] L. Alfayez, D. Mba, G. Dyson, The application of acoustic emission for detecting incipient cavitation and the best efficiency point of a 60 kw centrifugal pump: case study, NDT&E International, 38 (2005) 354-358.

DOI: 10.1016/j.ndteint.2004.10.002

[6] J. S. Choi, D. K. Mclaughin, D. E. Thompson, Experiments on the unsteady flow field and noise generation in a centrifugal pump impeller, Journal of Sound and Vibration, 263 (2003) 493-514.

DOI: 10.1016/s0022-460x(02)01061-1

[7] H. Xijie, Y. Ximin, Effects of centrifugal pump hydraulic design on vibration, Pump Technology, 41 (1995) 17-21.

[8] W. Renrong, C. Wenyi, Hydraulic design for reducing operating vibration of centrifugal pumps, Electromechanical Equipments, 24 (2004) 18-22.

[9] T. Minggao, L. Houlin, Y. Shouqi. CFD research on the effect of centrifugal pump outlet Angles on the characteristics of energy, China Rural Water and hydropower, 11 (2008) 104-106.

[10] Y. Huimin, W. Wenfu, F. Yao, Design and test of near infrared detector for grain component based on virtual instrument. Transactions of the Chinese Society for Agricultural Machinery, 41 (2010) 115-119.

[11] L. Houlin, W. Yong, Y. Shouqi. Effects of impeller outlet width on the vibration and noise from centrifugal pumps induced by flow, Journal of Huazhong University of Science and Technology (Natural Science Edition), 40 (2012) 123-127.

[12] F. Tao, L. Ke, L. Xiaohong, Development of the experimental system for measuring the hydrodynamic noise in centrifugal pump, Fluid Machinery, 31 (2005) 27-30.