The Numerical Simulation of Aerated Cavity Length and Negative Pressure on Stepped Spillway Combined with Y-shape Asymmetrical Flaring Gate Pier
In order to study the aerated cavity length and negative pressure on stepped spillway which combined with Y-shape asymmetric flaring gate pier body type, this paper applied RNG turbulence model , VOF model of water vapor two-phase, iterative solution of geometry reconstruction format of unsteady flow to generate free surface.The velocity and pressure coupling method using PISO algorithm, with unsteady flow algorithm approaches stable solution of steady flow.Numerically simulated the length of aerated cavity and negative pressure of stepped spillway combined with asymmetrical Y-shape flaring gate pier that with the contraction ratio respectively of 0.598, 0.497 and 0.445, the range from the upstream reservoir to downstream stilling basin.And compared the simulation results with experimental results, found that the aerated cavity length on steps basically consistent with the measured cavity length, the maximum error is 9.7%.Therefore, the numerical simulation method used in this paper can successfully calculate aerated cavity length and the pressure distribution, and with certain rationality and reliability.The simulation results shows that the aeration cavity length on steps increases with asymmetric flaring gate pier contraction ratio decreases, and the aerated cavity length of lateral side with smaller contraction angle is larger 4 to 5 times than lateral side with larger contraction angle.Negative pressure on steps is reduced with decreased contraction ratio, but the negative pressure distribution gradually expanding.The outer edge of steps have negative pressure, but the maximum negative pressure in the cavity on the vertical solid wall of first step.
Flaring gate pier Stepped spillway Contraction ratio Aerated cavity, Negative pressure
Hou Xiaoxia Yang Jurui Zheng Jianshu
Kunming University of Science and Technology, Modern Agricultural Engineering College , Kunming, 650 the Second Construction Company Limited,Beijing , 100068, China
国际会议
昆明
英文
883-893
2013-11-01（万方平台首次上网日期，不代表论文的发表时间）