Influence of shroud contour of semi-open impeller on hydraulic performance of ceramic centrifugal pump
TAO Yi1, YUAN Shouqi1, LIU Jianrui1, ZHANG Fan1, TAO Jianping2
1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Jiangsu Province Yixing Taoye Nonmetallic Chemical Machinery Factory Co.Ltd., Yixing, Jiangsu 214222, China
Abstract In order to investigate the effect of shroud contour of semi-open impeller on the hydraulic performance of a ceramic pump, seven contours with different angles between the contour and the radial direction, namely 24°, 22°, 20°, 18°, 16°, 14° and 12° are designed and corresponding numerical simulations are carried out, the hydraulic performance as well as flow field in these pumps are obtained. The variations of static pressure, total pressure and relative velocity along streamlines from the inlet to the outlet of impeller, the mass flow rate through the gap between the casing and the contour and the flow rate at the outlet of impeller are analyzed in detail. The simulated results show that as the angle decreases the pump head and total efficiency decline, but also the highest efficiency moves towards a low flow rate. The increased leakage through the gap in the mid-portion of contour, reverse and secondary flows at the outlet of impeller are responsible for the reduction in both the head and the efficiency. A comparison between the simulated performance curves and tested data for the optimum(20° angle)and poorest(12° angle)cases is made. The simulated results show good agreement with the measurements, in consequence, the optimization design is achieved. The results presented in this paper can provide a reference for the design of shroud contour of semi-open impeller in ceramic centrifugal pumps.
TAO Yi-,YUAN Shou-Qi-,LIU Jian-Rui- et al. Influence of shroud contour of semi-open impeller on hydraulic performance of ceramic centrifugal pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(3): 185-191.
ZHANG Huixuan, ZHANG Yaping, LI Jianjun. The preparation and application of steel-plastic-ceramic composite submersible pump with the properties of anti-corrosion and wear-resistance[J]. Total corrosion control, 2011, 25(7): 20-24.(in Chinese)
YUAN Shouqi, TAO Yi, CAO Weidong, et al. 3D numerical simulation of internal flow in NTB multi-stage ceramic pump[J]. Journal of drainage and irrigation machinery engineering, 2013,31(10): 829-834.(in Chinese)
AERTS R, GUT M. Ceramics and diaphragm pumps—a good match?[J]. World pumps, 2007,2007(495): 34-36.
WANG Chao, ZHU Zefei, SHI Honghui. Experiments on the micro liquid jet formation with piezoelectric micropump[J]. Journal of Zhejiang Sci-Tech University, 2009,26(5): 721-725.(in Chinese)
ZANGENEH M, GOTO A, HARADA H. On the role of three-dimensional inverse design methods in turbomachinery shape optimization[J]. Proceedings of the Institution of Mechanical Engineers: Part C: journal of mechanical engineering science, 1999,213(1): 27-42.
KARASSIK I J, MESSINA J P, COOPER P, et al. Pump handbook[M]. 4th ed. New York: McGraw-Hill, 2008:37-38.
DERAKHSHAN S, POURMAHDAVI M, ABDOLAHNEJAD E, et al. Numerical shape optimization of a centrifugal pump Impeller using artificial bee colony algorithm[J]. Computers & fluids, 2013,8: 145-151.
WANG Wenjie, PEI Ji, YUAN Shouqi, et al. Optimization of impeller meridional shape based on radial basis neural network[J]. Transactions of the CSAM, 2015, 46(6): 78-83.(in Chinese)
MENTER F R, KUNTZ M, LANGTRY R. Ten years of industrial experience with the SST turbulence model[C]//Proceedings of the 4th International Symposium on Turbulence, Heat and Mass Transfer. New York, NY, USA: Begell House Inc., 2003:625-632.