L型侧槽溢洪道进口段水力特性试验及三维数值模拟研究
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摘要
侧槽溢洪道被广泛运行于水利工程,但由于受场地、投资等限制,部分工程采用正堰与侧堰相结合的L型布置,导致槽内水流结构更加复杂。以景宁某工程溢洪道为例,采用Flow 3D三维仿真软件模拟了L型侧槽溢洪道进口段的水流结构,并结合水工模型试验,对槽内的水流流态、流速分布、水面线、压强和消能率等水力特性参数进行了对比分析。结果显示L型溢洪道侧槽内正、侧堰两股水流相互作用后,可有效提高过流能力,降低侧槽内水位,增加消能率;其次,数值模拟计算结果与水工模型试验基本吻合,进一步表明三维数值模拟在研究复杂水流结构时的可行性,成果可为类似工程的研究提供参考。
The side channel spillway is widely used in hydraulic engineering. When L-shaped side channel spillway is combined with the main weir and the side weir,the flow structure in the side channel is very complex. In this paper,Flow 3D flow calculation software is used to simulate the flow structure of L-shaped side channel spillway. Combined with the results of hydraulic model test,the hydraulic characteristic parameters such as the flow pattern,velocity distribution,water surface line,pressure and efficiency in side channel are compared and analyzed. The results show that the numerical simulation results are in good agreement with those in the hydraulic model test.The interaction between the main weir and the side weir flow in the L-shaped spillway can effectively improve the overflow capacity,reduce the water level in the side channel and improving energy dissipation rate. At the same time,it further shows the feasibility of three-dimensional numerical simulation,which can provide reference for similar projects.
The side channel spillway is widely used in hydraulic engineering. When L-shaped side channel spillway is combined with the main weir and the side weir,the flow structure in the side channel is very complex. In this paper,Flow 3D flow calculation software is used to simulate the flow structure of L-shaped side channel spillway. Combined with the results of hydraulic model test,the hydraulic characteristic parameters such as the flow pattern,velocity distribution,water surface line,pressure and efficiency in side channel are compared and analyzed. The results show that the numerical simulation results are in good agreement with those in the hydraulic model test.The interaction between the main weir and the side weir flow in the L-shaped spillway can effectively improve the overflow capacity,reduce the water level in the side channel and improving energy dissipation rate. At the same time,it further shows the feasibility of three-dimensional numerical simulation,which can provide reference for similar projects.
引文
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[9]王斌,王月华,包中进.浙江乌牛新闸闸下三维水流冲刷数值模拟研究[J].人民长江,2013,44(13):55-57,70.
[10]祝云宪,李顺涛,杨峰,等.出山店大坝泄洪消能防冲数值模拟研究[J].水电能源科学,2018,36(2):132-135.
[11]周招,王均星,梁砚,等.深尾水消力池非完全宽尾墩消能试验研究[J].水科学进展,2017,28(5):729-737.
[12]王月华,包中进,王斌.基于Flow-3D软件的消能池三维水流数值模拟[J].武汉大学学报(工学版),2012,45(4):454-457,476.
[13]SL 253-2000,溢洪道设计规范[S].
[14]王月华,刘云,韩晓维,等.胸墙式泄洪闸模型试验及数值模拟优化研究[J].水力发电,2018,44(3):29-32.
[2]武珂璘.关于侧槽变量流的水面线计算方法[J].浙江水利科技,1983(4):1-16,59-60.
[3]赖勇,唐毅,顾锡春,等.L形溢流堰侧槽溢洪道水力设计与试验研究[J].水利与建筑工程学报,2010,8(2):80-82.
[4]杨顺玉.侧槽溢洪道缓直缓弯调整段水力特性研究[J].人民长江,2009,40(21):37-39.
[5]刘发智,张法星,王超,等.侧槽式溢洪道水流的紊流数值模拟研究[J].水电能源科学,2011,29(4):95-98.
[6]陈振军.侧槽式溢洪道三维数值模拟研究[J].水利科技与经济,2018,24(4):31-33.
[7]邸宇测,牧振伟,孙文博.侧堰式溢洪道水力特性三维数值模拟[J].山西建筑,2018,44(7):217-219.
[8]陈小威.侧槽溢洪道水力特性模型试验与数值模拟研究[D].西安:西安理工大学,2017.
[9]王斌,王月华,包中进.浙江乌牛新闸闸下三维水流冲刷数值模拟研究[J].人民长江,2013,44(13):55-57,70.
[10]祝云宪,李顺涛,杨峰,等.出山店大坝泄洪消能防冲数值模拟研究[J].水电能源科学,2018,36(2):132-135.
[11]周招,王均星,梁砚,等.深尾水消力池非完全宽尾墩消能试验研究[J].水科学进展,2017,28(5):729-737.
[12]王月华,包中进,王斌.基于Flow-3D软件的消能池三维水流数值模拟[J].武汉大学学报(工学版),2012,45(4):454-457,476.
[13]SL 253-2000,溢洪道设计规范[S].
[14]王月华,刘云,韩晓维,等.胸墙式泄洪闸模型试验及数值模拟优化研究[J].水力发电,2018,44(3):29-32.
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