摘要
基于气体向气泡界面和水体表面传质的机理,针对大坝下游溶解气体过饱和的数值模拟,分析大坝非恒定泄水过程中流量的改变对过饱和气体浓度的影响.引入溶解气体对流扩散输运方程,建立三维紊流两相流模型,用于模拟气泡在水体中的运动和溶解.选用美国麦克纳里大坝非恒定泄水进行过饱和气体模拟预测,并与实测值进行比较,结果表明,所建立模型的可靠性及其相关应用有效.
The influence of discharge variation to the saturated gas concentration under unsteady discharging conditions was analyzed by means of the mechanism of gas diffusion to bubble interface and water surface. An unsteady three-dimensional and two-phase flow turbulent model was proposed to predict the movement and dissolution of gas in water. The dissolved gas convection-diffusion equation was introduced to solve the dissolved gas concentration, and standard k-e model was employed to close the mathematical equations. The calculated results have good agreement with measurements at the Mcnary dam.
出处
《深圳大学学报（理工版）》
EI
CAS
北大核心
2010年第3期296-300,共5页
Journal of Shenzhen University(Science and Engineering)
基金
国家自然科学基金资助项目(50909075)
教育部博士点基金资助项目(20090141120030)~~
关键词
气体溶解浓度
两相流
紊流模型
非恒定泄水
生态影响
gas supersaturation
two-phase flow
turbulent flow
unsteady discharge
ecological impact
