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| Numerical study of 3D flow in a bulb tubular pump system |
| LU Lin-guang1, HUANG Jin-jun1, CHEN Jian2, CHEN A-ping1, WANG Xing-mei2, ZOU Jian-guo2 |
| 1.College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China; 2.Huaian Investigation and Design Institute of Water Conservancy, Huaian, Jiangsu 223005, China |
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Abstract In order to have the optimum hydraulic design for a bulb tubular pump system of Huaiyin No.3 pumping station in the South-to-North Water Diversion Project,the numerical simulation for 3D flow pattern in the bulb tubular pump system is conducted.The mathematical models of the geometrical molded line of both bulb front-positioned and rear-positioned tubular pump system are built up according to the recommended structural configuration of the pump unit of the station at the stage of initial design.Numerical simulations of 3D turbulence flow in the two types of pump systems were respectively completed successfully,from which the internal and external hydraulic performances of the bulb tubular pump systems were found out.The main characteristics of flow patterns in the inlet and outlet of both bulb front-positioned and bulb rear-positioned tubular systems were discussed.The simulation results signify that it is realizable to apply numerical calculation to study 3D flow pattern and its hydraulic performance in a bulb tubular pump system.The energy characteristic of the bulb tubular pump system of the initial design of Huaiyin No.3 pumping station is not satisfied for the requirements of South-to-North Water Diversion Project.However,it is possible to obtain higher efficiency of the pump system by the way of further optimum calculation.bulb tubular pump;system;3D flow;numerical simulation
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Received: 08 August 2013
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