多层水股射流在水垫塘内流场特性的数值模拟  

Numerical Simulation of Flow Field Characteristics of Multi-level Jet Impinged into a Plunge Pool

作　　者：焦爱萍[1] 张春满[1] 刘沛清[1] 

机构地区：[1]北京航空航天大学流体力学研究所

出　　处：《灌溉排水学报》2007年第3期60-64,共5页Journal of Irrigation and Drainage

基　　金：国家优秀博士论文基金资助项目(200043);国家自然科学基金重点项目(50539060)

摘　　要：研究表孔采用上翘或下跌式、深孔采用下弯式布置所形成的表深孔上下差动出流,水股分层分散射流在水垫塘内的流动特征和各水股射流之间的干扰碰撞特性。选用非定常不可压缩流动的N-S方程和RNGk-ε紊流模型,采用VOF(Volume of Fluid)法,结合溪洛渡双曲拱坝水垫塘,对不同间距的多层二元射流进入消力池后的水流结构进行了数值模拟。分析不同水股间距对水垫塘底板的冲击压力的影响以及与流场、速度场的关系。This paper focus on the study of flowing and interference characteristics of differential outflow from surface spillway of up-warp or vertical-drop type and deep recurred outlet in a way of stratified and dispersed multi-jetting into a plunge pool. Using unsteady and incompressible flow N-S equation, RNG k-ε turbulent model and volume of fluid method, with reference to the practice in the inverted arch of the Xiluodu Double Curvature Arch Dam, the flow structure of 2-d jet of different spacing in a stilling basin has been numerically simulated to analyze the impact pressure of multi-jet of different spacing on a plunge pool invert, as well as their relationship with flow field and velocity field.

关 键 词：射流 水垫塘 二元射流 水气二相流 紊流数值模拟 

分 类 号：TV131.6[水利工程—水力学及河流动力学]