The eddy-eliminating method of guide cone in the closed sump

[摘要] In order to explore the effect on eddy-eliminating method of guide cone in the closed sump, the simple factor analysis and CFD numerical simulation are applied to calculate the flow field of closed sump and select ω-shaped back wall. ω-shaped back wall is consistent with the stream line in the suction sump, on this basis, CFD numerical simulation is conducted with the eddy-eliminating of the triangle guide cone and traditional guide cone. The results show that, for eddy-eliminating measures, with the height of triangular guide cone from 0 to 0.407HZ/DL, the excessive triangle guide cone hinder water into the flared pipe. With the width of triangular guide cone from 0.5 to 1.0BZ/DL, increasing width of triangular guide cone may increase the pumping hydraulic performance and pumping efficiency. However with the width of triangular guide cone from 0.5 to 1.0 BZ/DL, too broad traditional guide cone hinder water into the flared pipe. In the design discharge, whether triangle guide cone or traditional guide cone have a little effect on the efficiency of the pumping station. But in terms of the eddy-eliminating on the bottom of suction sump, it is necessary to set up guide cone.

[发布机构] School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu; 225009, China^1;Jiangsu Water Conservancy Engineering and Technology Consulting Co., Ltd., Nanjing, Jiangsu; 210029, China^2

[效力级别] 工业技术 [学科分类] 工业工程学

[关键词] CFD numerical simulations;Design discharge;Hydraulic performance;Pumping efficiency;Pumping stations;Stream lines