Abstract:Some key issues for the application of Flowmaster on the hydraulic transients calculation of pumping station were analysed. The modelling method of some basic components, such as pipe, pump, valve, air valve was proposed. Models of tunnel and surge tank, which are not provided by Flowmaster, were investigated. The tunnel was modeled by introducing a pressure correction factor in the pipe model. By modifying the reservoir model and combining input and output coefficient, the surge tank was mo delled. The proposed model and method were demonstrated in a domestic pump station. The hydraulic transients during pump start and stop were calculated, and the pressure variation along the pipe and tunnel was given. There is a serious negative pressure in the upstream of the pumping station when pump starts, and a reverse flow when pump stops without valve closure. Those phenomena are avoided by optimizing valve action and adding air valves.
王福军, 白绵绵, 肖若富. Flowmaster在泵站过渡过程分析中的应用[J]. 排灌机械工程学报, 2010, 28(2): 144-148.
Wang Fujun, Bai Mianmian, Xiao Ruofu. Analysis on hydraulic transients of pumping station with Flowmaster. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(2): 144-148.
[1]Ismaier A. Fluid dynamic interaction between water hammer and centrifugal pumps[J]. Nuclear Engineering and Design, 2009, 239(12): 3151-3154.[2]严登丰,叶健,陈茂满,等. 泵及泵装置效率表达与换算[J]. 排灌机械, 2007, 25(1): 1-8.Yan Dengfeng, Ye Jian, Chen Maoman, et al. Pump efficiency and conversion methods for efficiency[J]. Drainage and Irrigation Machinery, 2007, 25(1): 1-8. (in Chinese)[3]Bourdarias C, Gerbi S. A finite volume scheme for a model coupling free surface and pressurized flows in pipes[J]. Journal of Computational and Applied Mathematics,2007, 209(1): 109-131.[4]Chaudhry M H, Hussaini M Y. Second order accurate explicity finite difference schemes for water hammer analysis[J]. Journal of Fluids Engineering,Transactions of the ASME, 1985, 107(4): 523-529.[5]Romuald S, Marek M. Analysis of unsteady pipe flow using the modified finite element method[J]. Communications in Numerical Methods in Engineering, 2005, 21(4):183-199.[6]Wylie E B, Streeter V L. 瞬变流[M]. 清华大学流体传动与控制教研组,译. 北京:水利电力出版社,1983.[7]Ghidaoui M S, Zhao Ming, McInnis D A, et al. A review of water hammer theory and practice[J]. Applied Mechanics Reviews, 2005, 58(1/6): 49-75.[8]Flowmaster Group. Flowmaster User Guide[M]. Towcester: Flowmaster International Ltd, 2007.[9]杨开林,吴换营. 南水北调中线天津段泵站输水方案水击等效管计算方法[J]. 南水北调与水利科技, 2005, 3(3): 4-7.Yang Kailin, Wu Huanying. Equivalent method of parallel pipes for water hammer in Tianjin Project in Middel Route of South to North Water Transfers[J]. South to North Water Tromsfers and Water Science & Technology, 2005, 3(3): 4-7.(in Chinese)[10]魏光新. 水泵过渡程计算和蝶阀控制参数的选定[J]. 排灌机械, 1995, 13(4): 3-5.Wei Guangxin. Calculation on pump interim process and determination of butterfly control parameters[J]. Drai nage and Irrigation Machinery, 1995, 13(4): 3-5. (in Chinese)