Numerical simulation of turbulent flow in forebay with side-intake of pumping station
Liu Chao1,Han Xu2,Zhou Jiren1,Jin Yan1,Cheng Li1
(1.College of Hydraulic Engineering,Yangzhou University,Yangzhou,Jiangsu 225009,China;2.Inner Mongolia Autonomous Region Design Institute of Water Conservancy and Hydroelectric Power,Huhehaote,Inner Mongolia 010020,China)
Abstract：Large-scale circulation flow can be caused in the side-intake forebay with the effect of curved-flow character of side-intake.The three dimensional turbulent flow simulations were made for the circulation flow in a side-intake forebay and the flow after adopting the combined flow-adjusting fittings.The overall three dimensional flow field of the forebay was obtained.The results indicate that the combined flow-adjusting fittings eliminate the circulation flow in the side-intake forebay and improve the flow distribution at the forebay outlet.The uniformity of velocity distribution at the section 10 cm before inlet of suction passage is 84.43%.The better results of flow-adjusting can be achieved when the height of bottom sill is 0.3~0.45 time of the normal water depth.Flow symmetry is improved remarkably and the intensity of the circulation is decreased by "Y" type diversion pier,which provides the prior improving for the follow-up flow-adjusting effectively.Compared with the experimental results,CFD simulation results are consistent with the model test results,which indicate that the computation results are credible.
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