In order to investigate the influence of non-condensable gas on heat transfer characteristics of steam generator reflux cooling,the steam generator tube is modeled and numerically simulated based on diffusion equilibrium model and turbulence model by computational fluid dynamics(CFD)tools.The simulation results show that presence of non-condensable gas influences reflux cooling heat transfer obviously,only 2％non-condensable gas content will reduce the heat transfer coefficient to 60％～65％of that without non-condensable gas,meanwhile,presence of non-condensable gas can improve the velocity in ascending section,and the condensation heat transfer capacity increases along with the increase of inlet mass flow rate.
关键词
冷凝回流/相间传质/数值模拟/堆芯冷却/不凝性气体
Key words
reflux cooling/interphase mass transfer/numerical simulation/core cooling/non-condensable gas
维普
万方数据