摘要
为了探究水平旋流式内消能泄洪洞的消能机理及相关水力要素的变化情况,采用RNGk-ε双方程紊流模型及基于水气两相流的VOF方法,并结合公伯峡水电站的原型观测资料,得到了洞内流速和压强等水力要素的分布规律。数值模拟结果与公伯峡水电站原型观测数据的对比分析表明,数值模拟方法能够较好地模拟水平旋流泄洪洞的泄流过程;通过改变旋流室入流角度,得出了压强、通气量和消能率的变化规律。
For investigating energy dissipation mechanism of flow in horizontal swirl-flow tunnel with energy-dissipated internally and the change condition of relevant hydraulic factors,based on the measured data of Gongboxia Hydropower Plant,we obtained the velocity and pressure distribution laws of flow in the tunnel by applying RNG two-equation turbulence model and flow-air based VOF method and conducted numerical simulation analysis.The analysis results show that the discharge process in horizontal swirl-flow tunnel can be well numerically simulated.We obtain the variation laws of pressure,ventilation volume and energy dissipation rate by changing the inflow angle in the rotary chamber.
出处
《人民长江》
北大核心
2011年第5期78-81,共4页
Yangtze River
关键词
紊流模型
数值模拟
水平旋流
入流角度
消能率
turbulent model
numerical simulation
horizontal swirl flow
inflow angle
energy dissipation rate
