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.
[1]Spurr K J W,Froude,Boucherat F J,et al.The application of vorticity concepts to three irrigation intake designs[J].Proceedings of the Institution of Civil Engineers(London).Part 1:Design & Construction,1976,61(2):311-330.[2]刘超,成立,汤方平.水泵站前池三维流动计算和试验[J].农业机械学报,2001,32(6):41-44.Liu Chao,Cheng Li,Tang Fangping.Numerical simulation of three-dimensional turbulent flow inside a pumping forebay[J].Transactions of the ChineseSociety of Agricultural Machinery,2001,32(6):41-44.(in Chinese)[3]于永海,徐辉,程永光.泵站前池导流板整流措施数值模拟研究[J].水利水电技术,2006,37(9):41-43.Yu Yonghai,Xu Hui,Cheng Yongguang.CFD numerical simulation on modification of flow pattern with flow deflector at fore-bay of pumping station[J].Water Resources and Hydropower Engineering,2006,37(9):41-43.(in Chinese)[4]徐辉,田家山.大型污水泵站前池进水流态的研究[J].给水排水,1995(4):5-8.Xu Hui,Tian Jiashan.Study on the the flow status in the inlet pool of a large pumping station[J].Water & Wastewater Engineering,1995(4):5-8.(in Chinese)[5]郑源,屈波,张德虎,等.泵站前池进水流态模型试验研究[J].水泵技术,2002(5):43-45.Zheng Yuan,Qu Bo,Zhang Dehu,et al.Flow channel hydraulics test for forebay of pumping station[J].Pump Technology,2002(5):43-45.(in Chinese)[6]成立,刘超,周济人,等.泵站侧向进水流态及其改善措施机理探讨[J].排灌机械,2001,19(1):31-34.Cheng Li,Liu Chao,Zhou Ji ren,et al.Discussion on the side-direction flow of pumping station and improving of the flow pattern[J].Drainage and Irrigation Machinery,2001,19(1):31-34.(in Chinese)[7]周济人,汤方平,刘超,等.改善王山泵站前池水流流态的试验研究[J].排灌机械,1995,13(2):12-17.Zhou Jiren,Tan Fanping,Liu Chao,et al.Modeling atudy on improving flow pattern in diffusion channel of WANGSAN pumping station[J].Drainage and Irrigation Machinery,1995,13(2):12-17.(in Chinese)[8]江苏省水利动力工程重点实验室.江都抽水站引河流态模型试验研究报告[R].江都:江都水利枢纽,2006.[9]Constantinescu G,Patel V C.Numerical model for simulation of pump-intake flow and vortices[J].Journal of Hydraulic Engineering,ASCE,1998,124 (2):123-134.[10]周龙才,刘士和,丘传忻.泵站正向进水前池流态的数值模拟[J].排灌机械,2004,22(1):23-27.Zhou Longcai,Liu Shihe,Qiu Chuanxin.Numerical simulation of flow patten in the front inflow forebay of pumping station[J].Drainage and Irrigation Machinery,2004,22(1):23-27.(in Chinese)[11]Li S,Lai Y,WeberL,et al.Validation of a 3D numericalmodel for water pump intakes[J].Journal of Hydr.Research,2004,42 (2):2822-2921.[12]Matahel A,Tatsuaki N.Experimental study of 3D pump intake flows with and without cross flow[J].Journal of Hydraulic Engineering,ASCE,2001,127 (10):825-834.