不同大小台阶组合的过渡阶梯对阶梯溢流坝面压强特性的影响  

Effect of Transition Steps with Large and Small Step Combination on Pressure Characteristic of Stepped Spillway Dam

作　　者：王强 杨具瑞[2] 龙远莎 蒋瑜 卜宁 万云娇 

机构地区：[1]铜仁学院农林工程与规划学院,贵州铜仁554300 [2]昆明理工大学现代农业工程学院,云南昆明650500

出　　处：《水力发电》2018年第3期42-46,共5页Water Power

基　　金：黔教合KY字[2017]319号;黔科合LH字[2017]7318号;国家自然科学基金项目(51569010)

摘　　要：基于阿海水电站,采用水气两相流VOF方法,辅以三维RNGk-ε湍流数值模型,对由不同大小台阶组合的过渡阶梯一体化消能工进行三维数值模拟。研究结果表明:当过渡阶梯台阶尺寸较小时,负压分布在前几级台阶,且负压较小;当过渡阶梯首级台阶尺寸较大时,负压主要分布在首级台阶内,随着首级台阶尺寸的增大,负压将逐渐减小;阶梯壁面负压沿水舌两边缘向中心剖面先迅速增大,然后略有减小,坝面最大负压并不在水舌底部的中心剖面处。Taking Ahai Hydropower Station as a study case, the integrated energy dissipater with large and small step combination as transition steps is numerically simulated by using water-liquid two phase flow VOF method and three dimensional RNGk-ε turbulent flow model. The study result shows that, （a） when the size of transition step is smaller, the negative pressure appears in the position of first few steps and the magnitude is smaller; （b） when the size of first transition step is larger, the negative pressure is mainly distributed in the first step, and with the increase of first step＇s size, the negative pressure will decrease gradually; and （c） the pressure of stepped wall firstly increases rapidly along two edges of water nappe to the center section and then decreases slightly, and the maximum negative pressure of dam surface is not in the center section of the bottom of water nappe.

关 键 词：工程水力学 数值模拟 过渡阶梯 台阶组合 阿海水电站 

分 类 号：TV652.1[水利工程—水利水电工程]