摘要
迷宫堰在低水头条件下,过流能力相对较大。但对于山区水库,溢洪道宽度往往受限(迷宫堰宫数通常不超过3宫)。运用FLUENT软件,基于VOF方法与RNG k-ε双方程湍流模型,研究了展长和单宫角度变化下V型(单宫)迷宫堰与W型(两宫)迷宫堰过堰水流水力特性。结果表明:在低水位条件下,宫头下游负压区真空度皆大于W型迷宫堰,堰后水流流态均较为平顺;随水头增加,V型迷宫堰通过侧堰的水流需要更长时间调整至主流方向且负压区逐步向下游方向扩展,W型迷宫堰负压区域则基本保持不变,所以V型迷宫堰过流能力大于W型迷宫堰,但其堰后流态更为紊乱。
The discharging capacity of labyrinth weir is relatively larger under the low water head condition.For mountain reservoir,the width of spillway was often limited(the number of cells of labyrinth weir usually does not exceed 3).The hydrodynamic characteristics of the V type(mono cell)labyrinth weir and the W type(two cell)labyrinth weir were studied by using fluent software and based on VOF method and RNG k εtwo way turbulence model.The results show that under the low water level conditions,the velocity vector of the V type laby rinth weir,the angle of the side weir and the vacuum degree of the negative pressure zone are greater than that of the W type labyrinth weir.The flow pattern after weir is better;with the increase of the head,the velocity vector of V type labyrinth weir can transit to the flow direction more slowly and the negative pressure zone will extend to the downstream side,while the negative pressure area of the W type Labyrinth weir remains unchanged.V type labyrinth weir is more capable than W type labyrinth weir,but its flow state is more disordered after weir.
作者
马欣
邱勇
张华群
阮合春
李鑫
MA Xin;QIU Yong;ZHANG Huaqun;RUAN Hechun;LI Xin(College of Water Conservancy,Yunnan Agricultural University,Kunming 650201,China;Honghe Agricultural School,Mengzi 661100,China)
出处
《人民黄河》
CAS
北大核心
2020年第4期104-107,共4页
Yellow River
关键词
水力特性
数值模拟
V型迷宫堰
W型迷宫堰
hydraulic characteristics
numerical simulation
V labyrinth weir
W labyrinth weir
作者简介
马欣(1992—),男,云南蒙自人,助理讲师,硕士研究生,研究方向为工程水力学;通信作者:邱勇(1971—),男,云南会泽人,教授,硕士生导师,研究方向为工程水力学,E mail:13108854817@126.com。
