摘要
从两相流基本方程出发,分析了水利工程中水气两相流的特点,对明渠自由水面的掺气量进行研究,建立了适用于自掺气水流的数学模型,对明渠自掺气水流的掺气浓度和流速进行了数值计算,计算结果与实测值吻合较好,得出掺气浓度随水深的增加逐渐增大,流速自明渠底面向水面方向先增大,然后又逐渐减小。
The characteristics of the air-water two-phase flow often occurring in hydraulic engineering were analyzed in this paper based on the mathematical equation of the flow,and the aerated quantity of free water surface was studied. Also a self-aerated flow model was given and the self-aerated flow in open channel was calculated. The computational air concentration was compared with experimental data,and they were well tallied with each other. Then we could get that the air concentration was increased with the increase of depth of water,and the velocity of the water was increased first then decreased from bottom to surface of the open channel.
出处
《南水北调与水利科技》
CAS
CSCD
2008年第3期79-80,120,共3页
South-to-North Water Transfers and Water Science & Technology
关键词
水气两相流
自掺气
数学模型
air-water two-phase flows
self-aerated flow
mathematical model
