不同形式渡槽渐变段水力特性数值模拟研究

Hydraulic characteristics numerical simulation study under of the different forms of the transition section of the aqueduct

对不同形式渡槽渐变段水力特性进行CFD数值模拟计算。结果表明:槽身首端由于参杂气体形成的局部平衡压强,该处压强最小;渡槽渐变段变化剧烈程度由小到大顺序为:曲线反弯形、直线渐变形、圆弧直墙形、八字形、直角形;在八字形、直角形和圆弧直墙形渐变渡槽中,渐变段前段及衔接处压强值太大,上述部位易引起渡槽槽身材料形变破坏,在实际工程当中应作为重点防范部位。

CFD numerical simulation calculation of hydraulic characteristics of The different forms of the transition section of the aqueduct.The results showed that：the local head-end balance pressure tank body formed since the mixed gas,where the minimum pressure;changes in intensity of the transition section of the aqueduct ascending order：the anti-bending curve,linear gradient shape,arc-shaped vertical wall,eight-shaped,rectangular shape;in the eight-shaped,rectangular-shaped and arc-shaped,gradient Flute straight wall,anterior segment and the gradual convergence of the pressure value is too large,these parts can lead to deformation of the material damage Aqueduct,in the actual project which should serve as focus on prevention site.