Characteristics of air-water flow in an emptying tank under different conditions  

作　　者：Jialing Liang Yiyi Ma Yi Zheng 

机构地区：[1]College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China [2]Zhejiang Communications Construction Group Co.,Ltd,Hangzhou 310053,China

出　　处：《Theoretical & Applied Mechanics Letters》2021年第6期313-319,共7页力学快报（英文版）

基　　金：The writers gratefully acknowledge financial support from the Fundamental Research Funds for the Central Universities(2020QNA4017).

摘　　要：This paper experimentally studied the features of air-water flow during the emptying of a water-filled prismatic tank with a bottom orifice under different conditions.The experiments were conducted with both circular and elliptical orifices,with and without ventilation.The evolution of bubbles,water pressure variation,and water level change with time were recorded in the experiments and analyzed.Based on the results,the evolution of bubbles could be mainly divided into three stages of formation,deformation,and decomposition.Ventilation was found important to the emptying process,with which the drainage efficiency was much higher than that under the unventilated condition.Additionally,under the unventilated condition,the drainage efficiency with the circular orifice was slightly higher than that with the elliptical orifice.

关 键 词：Air-water flow BUBBLE Emptying process Drainage efficiency ORIFICE 

分 类 号：O35[理学—流体力学]