高坝空中挑射水流水力特性及消能机理的研究

Study of High Dam Aerial Water Jet Nappe Flow Hydraulic Properties and Its Energy Dissipation Mechanism

本文介绍研究高坝泄洪消能空中挑射水流水力特性及消能机理的重要意义;介绍利用作者研制的挑射水流流速仪，为工程模型试验实测挑射水流沿程流速的情况及成果；并在上述实测成果的基础上进行挑射水流流动规律的分析研究。提出挑射水流空中消能率的计算公式及检验消能效果的其它因素。对挑射水流空中消能机理作了分析研究。

This paper introduces the significance of the study of the high dam aerial water jet nappe flow hydraulic properties and its energy dissipation mechanism. It introduces the conditions and results of meastiring the velocities along the streamline of the aerial water jet nappe flow for the engineering model test, using the aerial water jet nappe flow velocimeter, which is developed by the authors of the paper. It introduces the analysis of the flowing rules of the aerial water jet nappe flow, based on the above real measured result. It advances a formula for calculating the rate of energy dissipation of the aerial water jet nappe flow and the other factors of testing the effective-ness of energy dissipation. It analysises the energy dissipation mechanism of the aerial water jet nappe flow.