典型文献
Characteristics of air flow driven by the free surface of the open channel
文献摘要：
Spillway tunnels are a key structure in large-scale water conservancies.The high-head water inlet makes the water surface-velocity extremely high,and the air is driven by the free surface of the water to move downstream.This paper studies the air velocity distribution above the water surface through the model tests,under the assumption that the airflow is a turbulent boundary layer with a rough interface,and the influence of the water depth and the water velocity on the air velocity distribution is analyzed.It is shown that the air velocity is in an exponential distribution.As the measured position moves upward,the air velocity gradually decreases,and the gradient decreases.When the water depth increases,the air velocity increases but with the same distribution form.With the increase of the water surface-velocity,the air velocity at the same measuring point increases,the variation range near the water surface is large,the air boundary layer height increases slightly,and the index coefficient of the air velocity distribution function decreases.Through numerical fitting,the calculation formula of the air boundary layer thickness at different water surface velocities is obtained,along with the numerical value of the index coefficient.
文献关键词：
中图分类号：
作者姓名：
Jing Gong;Jun Deng;Wang-ru Wei;Wei-wei Li
作者机构：
State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China
文献出处：
引用格式：
[1]Jing Gong;Jun Deng;Wang-ru Wei;Wei-wei Li-.Characteristics of air flow driven by the free surface of the open channel)[J].水动力学研究与进展B辑,2022(01):69-75
A类：
Spillway,conservancies
B类：
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AB值：
0.419089
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