摘要
本文建立了放空洞水流三维k-ε紊流数学模型,通过对多个库水位工况下水流数值模拟结果的泄流量与水工模型试验结果进行了比较,验证了数学模型的可靠性。通过数值模拟方法对放空洞检修闸收缩段和龙抬头竖弯段进行了优化。研究结果表明:加长收缩段长度和提高收缩段进口高度可使壁面压力分布显著改善,并且在导流闸出口两侧采用内圆弧也可使收缩段进口两侧局部压力分布改善。
A 3-D turbulence k-6 mathematical model for the emptying tunnel is established herein, and then the reliability of the model is verified through the comparison made between the discharge flow rates obtained from the numerical simulations of the flows under the operation conditions of several reservoir levels and the results from the hydraulic model tests concerned. Based on the numerical simulation, the cheek gate contraction section and the vertical-curve section of the emptying tunnel are optimized. The study result shows that the pressure distribution on the wall surface is to be improved significantly, if the length of the con- traction section is enlarged and the height of the contraction section intake is raised, furthermore, the local pressure distributions on both the sides of the intake of the contraction section can also be improved by adopting the shape of inner arc to both the sides of the outlet for the diversion gate.
出处
《水利水电技术》
CSCD
北大核心
2011年第10期78-82,共5页
Water Resources and Hydropower Engineering
基金
中央级公益性科研院所基本科研业务费(CKSF2010011)
(CKSF2010013/SL)
关键词
龙抬头式放空洞
三维数值模拟
体型优化
ogee emptying tunnel
3-D numerical simulation
shape optimization
