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中文摘要：
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。
英文摘要：
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.
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