排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2017, Vol. 35 Issue (3): 185-191    DOI: 10.3969/j.issn.1674-8530.15.0248
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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
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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.
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Articles by authors
TAO Yi-
YUAN Shou-Qi-
LIU Jian-Rui-
ZHANG Fan-
TAO Jian-Ping-
Key wordsceramic pump   semi-open impeller   meridional shape   numerical simulation   optimization design     
Received: 2015-11-13;
Cite this article:   
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.
 
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