Experimental study of air-water interface properties in self-aerated flows  

作　　者：Wang-ru Wei Wei-lin Xu Jun Deng Zhong Tian Fa-xing Zhang 

机构地区：[1]State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Journal of Hydrodynamics》2019年第5期940-948,共9页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.51609162,51379138);the National Program on Key Research Project(Grant No.2016YFC0401901).

摘　　要：The microscopic air-water structures and the interface area properties in the self-aerated flows are important research issues in the high-speed self-aerated flows.The present experimental study concerns the mean and medium air chord length distributions in the self-aerated chute flows for different flow Reynolds numbers and air concentration conditions.The relationship between the microscopic and the macroscopic aerated properties in the air-water mixture region is analyzed.The distribution of the microscopic specific air-water interface area with the macroscopic air concentration variation is self-similar in the self-aerated region.In view of the difference of the air-water structure in high and low aerated regions,a new relationship is proposed for predicting the distributions of a specific air-water interface area,and the agreement between the measured and predicted results is satisfactory.

关 键 词：AIR-WATER interface area SELF-AERATION air CHORD SIZE CHUTE flow experimental study 

分 类 号：O35[理学—流体力学]