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| Numerical simulation and experiment of influence of hem on performance of vortex pump |
| Zhu Rongsheng1, Su Baowen1, Wang Xiuli1, Yin Yonggang2 |
| (1.Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China； 2.Jiangsu Guoquan Manufacturing Pump Co. Ltd.， Zhenjiang, Jiangsu 212009, China) |
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Abstract In order to improve the head and efficiency of vortex pumps, numerical simulation and experimental research of influence of hems on performance of a vortex pump was carried out. Something was got by contrasting three kinds of blades with different sizes hems on performance of the pump. The model was designed by Pro/E considering impeller and volute as a whole and with unstructured grid generation technique. The numerical results by contrasting the calculated values of three different hems show that the internal flow includes longitudinal and transverse vortices，and hems can improve the flow patterns inside the pump and restrict the transformation of radial flow to axial one. The influence of hems on vortex pump′s performance was discussed. The experimental results show that the head increases by 3.64 m and the efficiency increases by 7.0%. The research shows that hem can reduce the loss of hydraulic and improve head and efficiency.
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Received: 15 December 2009
Published: 30 September 2010
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