SIMULATIONS OF THE THREE-DIMENSIONAL TOTAL DISSOLVED GAS SATURATION DOWNSTREAM OF SPILLWAYS UNDER UNSTEADY CONDITIONS  

作　　者：FU Xiao-li LI Dan ZHANG Xiao-feng 

机构地区：[1]State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China

出　　处：《Journal of Hydrodynamics》2010年第4期598-604,共7页水动力学研究与进展B辑（英文版）

基　　金：support by the National Natural Science Foundation of China (Grant No. 50909075);the Doctoral Program Foundation of Institutions of Higher Learning of China (Grant No. 20090141120030);the Fundamental Research Funds for Major Universities (Grant No. 5082017)

摘　　要：Dams are often operated in a way to discharge over the spillways,which would cause a high dissolved concentration of air and be harmful to fish.The bubble transfer and the water surface transfer play an important role in affecting the concentration of the Total Dissolved Gas（TDG）.Based on recent numerical simulations of the total dissolved gas saturation,in this article,a two-phase TDG transport equation is adopted to develop an unsteady three-dimensional（3-D） two-phase flow Computational Fluid Dynamics（CFD） model,including a number of parameters such as water depth,pressure and air volume entrained.This model is used to predict the hydrodynamics and the TDG distribution under unsteady discharge conditions.Good agreement between measured and numerical results is obtained for a case study.Dams are often operated in a way to discharge over the spillways,which would cause a high dissolved concentration of air and be harmful to fish.The bubble transfer and the water surface transfer play an important role in affecting the concentration of the Total Dissolved Gas（TDG）.Based on recent numerical simulations of the total dissolved gas saturation,in this article,a two-phase TDG transport equation is adopted to develop an unsteady three-dimensional（3-D） two-phase flow Computational Fluid Dynamics（CFD） model,including a number of parameters such as water depth,pressure and air volume entrained.This model is used to predict the hydrodynamics and the TDG distribution under unsteady discharge conditions.Good agreement between measured and numerical results is obtained for a case study.

关 键 词：gas supersaturation ANISOTROPIC two-phase flow 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程] TM855[电气工程—高电压与绝缘技术]