大倾角、大收缩角泄槽收缩段边墙水深计算方法探讨  

Calculation Method of Water Depth of Side Wall in Shrinkage Section with Large Inclination Angle and Large Shrinkage Angle

作　　者：吴健 张小飞[1] 黄佳敏 肖天培 WU Jian;ZHANG Xiao-fei;HUANG Jia-min;XIAO Tian-pei(College of Civil Engineering and Architectural,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学土木建筑工程学院,南宁530004

出　　处：《水利科技与经济》2022年第1期82-93,共12页Water Conservancy Science and Technology and Economy

摘　　要：目前,泄槽收缩段冲击波的计算分析主要基于Ippen提出的冲击波理论,而该冲击波理论建立于收缩段为平底、小收缩角的条件,采用Ippen冲击波理论来求解大倾角、大收缩角收缩段冲击波问题,会产生较大误差。为了探讨大倾角、大收缩角收缩段边墙水深的计算方法,依托FLUENT软件,采用基于RSM湍流模型的三维湍流数值模拟方法,通过系统计算不同倾角、收缩角条件下收缩段的冲击波波前后水深,基于多元非线性回归分析方法,建立冲击波波前后水深比的计算公式。经初步验证,公式基本合理。At present,the calculation and analysis of the shock wave in the contraction section are mainly based on the ideal shock wave theory proposed by Ippen.The shock wave theory is established under the condition that the contraction section is flat and the contraction angle is small.Using the Ippen shock wave theory to solve the shock wave problem in the contraction section with large inclination angle and large contraction angle will produce large errors.In order to explore the calculation method of the water depth of the side wall in the contraction section with large inclination angle and large contraction angle,based on FLUENT,the three-dimensional turbulent numerical simulation method based on RSM turbulence model is used to systematically calculate the water depth of the shock wave front and back in the contraction section under different inclination angles and large contraction angles.Based on the multivariate nonlinear regression analysis method,the calculation formula of the shock wave angle and the ratio of the wave front and back water depth are established.The formula is basically reasonable after preliminary verification.

关 键 词：泄槽 收缩段 水流特性 冲击波 数值模拟 

分 类 号：TV651.1[水利工程—水利水电工程]