| Cite this article: | 徐磊,李非凡,孙世宏,等.前置竖井贯流泵出水流道设计参数对其水力性能的影响[J].灌溉排水学报,0,():-. |
| XU Lei,LI Feifan,SUN Shihong,et al.前置竖井贯流泵出水流道设计参数对其水力性能的影响[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Influence of Design Parameters of Outlet Conduit of Front Shaft Tubular Pump on its Hydraulic Performance |
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XU Lei, LI Feifan, SUN Shihong, JI Dongtao, SHI Wei, LU Weigang, LU Linguang
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Yangzhou Universtiy
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| Abstract: |
| 【Objective】In order to reduce hydraulic loss of outlet conduit of front shaft tubular pump system and improve hydraulic performance of the pump system.【Method】Based on the Navier-Stokes equations and standard k-ε turbulent model, the numerical simulation method which is verified by the model test was used to study the influence of outlet conduit design parameters on its hydraulic performance. On the basis of analyzing the composition and hydraulic design parameters of outlet conduit, three kinds of outlet conduits with different outlet widths were proposed. The numerical simulation of the hydraulic loss and flow pattern of outlet conduit with different plane diffusion angles, elevation diffusion angles and transition section lengths were finished by using the single factor method.【Result】The research results show that as follows: With the increase of the plane diffusion angle of the outlet conduit, the hydraulic loss of the outlet conduit decreases first and then increases,the hydraulic loss of outlet conduit is the least when the plane diffusion angle is about 17°; When the elevation diffusion angle of outlet conduit is less than 7°, the hydraulic loss of the outlet conduit is basically unchanged, but when the elevation diffusion angle is more than 7°, the hydraulic loss of the outlet conduit increases suddenly; Along with the increase of the diffusion section length of the outlet conduit,the hydraulic loss of outlet conduit decreases first and then increases, the hydraulic loss of outlet conduit reaches the minimum when the relative length of the transition section is between 0.6 and 0.8; In the common range of hydraulic design parameters of outlet conduit, there was no bad flow pattern in each outlet conduit.【Conclusion】The calculation and analysis results can provide reference for the hydraulic design of the outlet conduit of the same type of pumping station. |
| Key words: front shaft tubular pump; outlet conduit; plane diffusion angle; elevation diffusion angle;transition length |
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