泵站前池单排方柱整流措施数值模拟
|
摘要
为改善泵站前池内水流流态,基于Fluent软件,运用RNG k-ε模型对加单排方柱的正向进水泵站前池流态进行数值模拟,分析单排方柱的几何参数对前池流态改善的影响。结果表明:单排方柱具有分流效果,流经单排方柱的水流会向前池两侧分散,在单排方柱的后方形成漩涡。无整流措施时,泵站前池流态紊乱;通过在前池加设单排方柱可显著改善流态;单排方柱宜布置在前池前中部,不宜布置在两侧回流区内;方柱宽度越小,分流作用越小,行近流速分布越不均匀。
In order to improve the flow pattern in the foreway of a pump station,the RNG k-ε turbulence model based on the Fluent software was used to simulate the flow pattern in the front inflow forebay of a pump station with a single row of square columns,and the effect of geometric parameters of these square columns on the flow pattern in the foreway was analyzed. The results show that a single row of square columns leads to flow separation,the water flowing through the square columns disperses to the two sides of the foreway, and vortices form behind the square columns. Without rectification measures,the flow pattern is disorderly in the forebay,but it is significantly improved when a single row of square columns are arranged in the forebay. These square columns should be arranged in the forepart and middle of the forebay,not in the backflow zone at the two sides. The flow separation effect decreases and the approach velocity is more non-uniform with the decrease of the width of square columns.
In order to improve the flow pattern in the foreway of a pump station,the RNG k-ε turbulence model based on the Fluent software was used to simulate the flow pattern in the front inflow forebay of a pump station with a single row of square columns,and the effect of geometric parameters of these square columns on the flow pattern in the foreway was analyzed. The results show that a single row of square columns leads to flow separation,the water flowing through the square columns disperses to the two sides of the foreway, and vortices form behind the square columns. Without rectification measures,the flow pattern is disorderly in the forebay,but it is significantly improved when a single row of square columns are arranged in the forebay. These square columns should be arranged in the forepart and middle of the forebay,not in the backflow zone at the two sides. The flow separation effect decreases and the approach velocity is more non-uniform with the decrease of the width of square columns.
引文
[1]周济人,刘超,汤方平,等.泵站复杂前池内的流态改善研究[J].江苏农学院学报,1998(4):93-96.(ZHOU Jiren,LIU Chao,TANG Fangping,et al.Study on improving flow pattern of the complicated forebay of a pumping station[J].Jiangsu Agricultural Research,1998(4):93-96.(in Chinese))
[2]罗缙,林颖.火(核)电站循环水泵房前池水力模型试验研究[J].河海大学学报(自然科学版),2000,28(5):106-110.(LUO Jin,LIN Ying.Hydraulic test of pump sumps of thermal(nuclear)power plant[J].Journal of Hohai University(Naturl Science),2000,28(5):106-110.(in Chinese))
[3]朱红耕.工程措施对水泵进水条件影响的试验研究[J].水力发电学报,2004,23(4):69-73.(ZHU Honggen.Experimental study on the influence of engineering measures upon the flow conditions of pump[J].Journal of Hydroelectric Engineering,2004,23(4):69-73.(in Chinese))
[4]罗灿,刘超.多机组泵站侧向进水特性模拟和改进研究[J].水力发电学报,2015,34(1):207-214.(LUO Chan,LIU Chao.Numerical simulation and improvement of side-intake characteristics of multi-unit pumping station[J].Journal of Organic Chemistry,2015,34(1):207-214.(in Chinese))
[5]刘超,成立,汤方平.取水前池复杂流动数值模拟[J].华北水利水电学院学报,2001(3):35-39.(LIU Chao,CHENG Li,TANG Fangli.Numerical simulation of threedimensional turbulent flow for pumping forebay[J].Journal of North China Institute of Water Conservancy and Hydroelectric Power,2001(3):35-39.(in Chinese))
[6]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(9):41-43.(YU Yonghai.XU Hui.CHENG Yongguang.CFD Numerical simulation on modification of flow pattern with flow deflector atforebay of pumping station[J].Water Resources and Hydropower Engineering,2006(9):41-43.(in Chinese))
[7]罗灿,成立,刘超.泵站正向进水前池底坎整流机理数值模拟[J].排灌机械工程学报,2014,32(5):393-398.(LUO Chan,CHENG Li,LIU Chao.Numerical simulation of mechanism for sill rectifyingflow in pumping station intake[J].Journal of Drainage and Irrigation Machinery Engineering,2014,32(5):393-398.(in Chinese))
[8]VERSTEEG H K,MALALASEKERA W.An introduction to computational fluid dynamics:the finite volume method[M].New York:Pearson Education,2007.
[9]资丹,王福军,姚志峰,等.大型泵站进水流场组合式导流墩整流效果分析[J].农业工程学报,2015,31(16):71-77.(ZI Dan,WANG Fujun,YAO Zhifeng,et al.Effects analysis on rectifying intake flow field for large scale pumping station with combined diversion piers[J].Transactions of the Chinese Society of Agricultural Engineering,2015,31(16):71-77.(in Chinese))
[10]资丹,王福军,陶然,等.边界层网格尺度对泵站流场计算结果影响研究[J].水利学报,2016,47(2):139-149.(ZI Dan,WANG Fujun,TAO Ran,et al.Research for impacts of boundary layer grid scale on flow field simulation results in pumping station[J].Transactions of the Chinese Society of Agricultural Engineering,2016,47(2):139-149.(in Chinese))
[11]成立,刘超,周济人,等.泵站前池底坝整流数值模拟研究[J].河海大学学报(自然科学版),2001,29(3):42-45.CHENG Li,LIU Chao,ZHOU Jiren,et al.Numerical simulation of sill flows in the forebay of pumping station[J].Journal of Hohai University(Naturl Science),2001,29(3):42-45.(in Chinese))
[12]刘梅清,林琦,梁兴,等.泵站前池流态改善效果的数值模拟分析[J].武汉大学学报(工学版),2012,45(2):152-156.(LIU Meiqing,LIN Qi,LIANG Xing,et al.Numerical simulation research on improving flow pattern of forebay of a pumping station[J].Engineering Journal of Wuhan University,2012,45(2):152-156.(in Chinese))
[13]冯建刚,李杰.大型城市水源泵站前池流态及改善措施试验[J].水利水电科技进展,2010,30(2):70-74.(FENG Jiangang,LI Jie.Flow patterns in forebays of large urban water source pumping stations and countermeasures[J].Advances in Science&Technology of Water Resources,2010,30(2):70-74.(in Chinese))
[14]冯旭松.泵站前池底坎整流及坎后流动分析[J].江苏水利,1998(1):31-33.(FENG Xusong.Flow rectification and analysis of sill in the forebay of pump station[J].Jiangsu Hydraulics,1998(1):31-33.(in Chinese))
[2]罗缙,林颖.火(核)电站循环水泵房前池水力模型试验研究[J].河海大学学报(自然科学版),2000,28(5):106-110.(LUO Jin,LIN Ying.Hydraulic test of pump sumps of thermal(nuclear)power plant[J].Journal of Hohai University(Naturl Science),2000,28(5):106-110.(in Chinese))
[3]朱红耕.工程措施对水泵进水条件影响的试验研究[J].水力发电学报,2004,23(4):69-73.(ZHU Honggen.Experimental study on the influence of engineering measures upon the flow conditions of pump[J].Journal of Hydroelectric Engineering,2004,23(4):69-73.(in Chinese))
[4]罗灿,刘超.多机组泵站侧向进水特性模拟和改进研究[J].水力发电学报,2015,34(1):207-214.(LUO Chan,LIU Chao.Numerical simulation and improvement of side-intake characteristics of multi-unit pumping station[J].Journal of Organic Chemistry,2015,34(1):207-214.(in Chinese))
[5]刘超,成立,汤方平.取水前池复杂流动数值模拟[J].华北水利水电学院学报,2001(3):35-39.(LIU Chao,CHENG Li,TANG Fangli.Numerical simulation of threedimensional turbulent flow for pumping forebay[J].Journal of North China Institute of Water Conservancy and Hydroelectric Power,2001(3):35-39.(in Chinese))
[6]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(9):41-43.(YU Yonghai.XU Hui.CHENG Yongguang.CFD Numerical simulation on modification of flow pattern with flow deflector atforebay of pumping station[J].Water Resources and Hydropower Engineering,2006(9):41-43.(in Chinese))
[7]罗灿,成立,刘超.泵站正向进水前池底坎整流机理数值模拟[J].排灌机械工程学报,2014,32(5):393-398.(LUO Chan,CHENG Li,LIU Chao.Numerical simulation of mechanism for sill rectifyingflow in pumping station intake[J].Journal of Drainage and Irrigation Machinery Engineering,2014,32(5):393-398.(in Chinese))
[8]VERSTEEG H K,MALALASEKERA W.An introduction to computational fluid dynamics:the finite volume method[M].New York:Pearson Education,2007.
[9]资丹,王福军,姚志峰,等.大型泵站进水流场组合式导流墩整流效果分析[J].农业工程学报,2015,31(16):71-77.(ZI Dan,WANG Fujun,YAO Zhifeng,et al.Effects analysis on rectifying intake flow field for large scale pumping station with combined diversion piers[J].Transactions of the Chinese Society of Agricultural Engineering,2015,31(16):71-77.(in Chinese))
[10]资丹,王福军,陶然,等.边界层网格尺度对泵站流场计算结果影响研究[J].水利学报,2016,47(2):139-149.(ZI Dan,WANG Fujun,TAO Ran,et al.Research for impacts of boundary layer grid scale on flow field simulation results in pumping station[J].Transactions of the Chinese Society of Agricultural Engineering,2016,47(2):139-149.(in Chinese))
[11]成立,刘超,周济人,等.泵站前池底坝整流数值模拟研究[J].河海大学学报(自然科学版),2001,29(3):42-45.CHENG Li,LIU Chao,ZHOU Jiren,et al.Numerical simulation of sill flows in the forebay of pumping station[J].Journal of Hohai University(Naturl Science),2001,29(3):42-45.(in Chinese))
[12]刘梅清,林琦,梁兴,等.泵站前池流态改善效果的数值模拟分析[J].武汉大学学报(工学版),2012,45(2):152-156.(LIU Meiqing,LIN Qi,LIANG Xing,et al.Numerical simulation research on improving flow pattern of forebay of a pumping station[J].Engineering Journal of Wuhan University,2012,45(2):152-156.(in Chinese))
[13]冯建刚,李杰.大型城市水源泵站前池流态及改善措施试验[J].水利水电科技进展,2010,30(2):70-74.(FENG Jiangang,LI Jie.Flow patterns in forebays of large urban water source pumping stations and countermeasures[J].Advances in Science&Technology of Water Resources,2010,30(2):70-74.(in Chinese))
[14]冯旭松.泵站前池底坎整流及坎后流动分析[J].江苏水利,1998(1):31-33.(FENG Xusong.Flow rectification and analysis of sill in the forebay of pump station[J].Jiangsu Hydraulics,1998(1):31-33.(in Chinese))