The effects of impeller outlet width on pressure pulsation in two side chambers of a centrifugal pump are studied based on the mutual authentication between experiment and numerical simulation. The pump performance curves are measured and predicted with CFD simulation at different impeller outlet widths, the fluid static pressure and pressure pulsation as well as pulsation amplitude distributions in both side chambers are obtained and analyzed comparatively across the different width cases. The predicted performance curves are in good agreement with the experimental data. It is turned out that the static pressure and pressure pulsation in the front side chamber ascend with the enlarging outlet width and reducing radius. However, there is no significant change in them with variable outlet width and radius in the rear side chamber. Based on a compromise between pump performance and pressure pulsation in the chambers and volute, the ratio of the impeller outlet width to the impeller diameter should be less than 0.06 at the specific speed ns=97. In order to make the pressure pulsations effectively decayed in the side chambers, the best ratio of the impeller outlet width to the gap of the front side chamber should be in the vicinity of 1.81. The results can be used to guide the optimal design of the impeller of centrifugal pumps.
DAI Han-Wei,LIU Hou-Lin,DING Jian et al. Effects of impeller outlet width on pressure pulsation in two side chambers of centrifugal pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(1): 20-25.
Dürrer B, Wurm F H, Ag W. Noise sources in centrifugal pumps[C]//Proceedings of the 2nd WSEAS International Conference on Applied and Theoretical Mechanics. Venice, Italy:[s.n.], 2006: 203-207.
Birajdar R, Patil R, Khanzode K. Vibration and noise in centrifugal pumps—Sources and diagnosis methods[C]//Proceedings of the 3rd International Conferences on Integrity, Reliability and Failure. Porto, Portugal:[s.n.], 2009.
Gulich J F. Centrifugal Pumps[M]. London: Springer, 2010.
Rudnev S S, Khabetskaya V A. Selection of width of a pump impeller at its outlet[J]. Chemical and Petroleum Engineering, 1980, 16(9): 545-549.
Shi W, Zhou L, Lu W, et al. Numerical prediction and performance experiment in a deep-well centrifugal pump with different impeller outlet width[J]. Chinese Journal of Mechanical Engineering, 2013, 26(1): 46-52.
Zhou L, Shi W, Wu S. Performance optimization in a centrifugal pump impeller by orthogonal experiment and numerical simulation[J]. Advances in Mechanical Engineering, 2013: 385809.
Parrondo-Gayo J L, Gonzalez-Perez J, Fernaández-Francos J. The effect of the operating point on the pressure fluctuations at the blade passage frequency in the volute of a centrifugal pump[J]. Journal of Fluids Engineering, 2002, 124(3): 784-790.
Dong R, Chu S, Katz J. Effect of modification to tongue and impeller geometry on unsteady flow, pressure fluctuations, and noise in a centrifugal pump[J]. Journal of Turbomachinery, 1997, 119(3): 506-515.
Barrio R, Fernández J, Blanco E, et al. The effect of impeller cutback on the fluid-dynamic pulsations and load at the blade-passing frequency in a centrifugal pump[J]. Journal of Fluids Engineering, 2008, 130(11): 111102.
Spence R, Amaral-Teixeira J. Investigation into pressure pulsations in a centrifugal pump using numerical methods supported by industrial tests[J]. Computers & Fluids, 2008, 37(6): 690-704.
Spence R, Amaral-Teixeira J. A CFD parametric study of geometrical variations on the pressure pulsations and performance characteristics of a centrifugal pump[J]. Computers & Fluids, 2009, 38(6): 1243-1257.
Shi Weidong, Zhang Lei, Chen Bin, et al. Influence of gap on pressure pulsation and radial force in centrifugal pump[J]. Journal of Drainage and Irrigation Machinery Engineering, 2012, 30(3): 260-264.(in Chinese)
Jiang Wei, Li Guojun, Zhang Xinsheng. Effect of oblique angle of blade trailing edge on pressure fluctuation in centrifugal pump[J]. Journal of Drainage and Irrigation Machinery Engineering, 2013, 31(5): 369-372.(in Chinese)
Shi Weidong, Zhang Guangjian, Zhang Desheng, et al. Effects of non-uniform suction flow on permance and pressure fluctuation in axial-flow pumps[J]. Journal of Drainage and Irrigation Machinery Engineering, 2014, 32(4): 277-282.(in Chinese)
Zhang Yuxin, Wang Xiuye, Ding Peng, et al. Numerical analysis of pressure fluctuation of internal flow in submersible axial-flow pump[J]. Journal of Drainage and Irrigation Machinery Engineering, 2014, 32(4): 302-307.(in Chinese)
Solis M, Bakir F, Khelladi S, et al. Numerical study on pressure fluctuations reduction in centrifugal pumps: Influence of radial gap and splitter blades[J]. ISRN Mechanical Engineering, 2011:479594.
Blanco E, Barrio R, Parrondo J, et al. Fluid-dynamic pulsations and radial forces in a centrifugal pump with different impeller diameters[C]//Proceedings of the ASME 2005 Fluids Engineering Division Summer Meeting, 2005: 1461-1470.
González J, Parrondo J, Santolaria C, et al. Steady and unsteady radial forces for a centrifugal pump with impeller to tongue gap variation[J]. Journal of Fluids Engineering, 2006, 128(3): 454-462.
Majidi K. Numerical study of unsteady flow in a centrifugal pump[J]. Journal of Turbomachinery, 2005, 127(2): 363-371.