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应用经试验验证的计算流体动力学(CFD)程序分析第三代先进核电厂非能动安全壳冷却系统(PCS)空气流道阻力特性。结果表明:空气流道阻力系数随着流速的增加变化不大,主要阻力出现在空气入口、导向叶片和上升通道;导向叶片的设计可降低流动损失,可通过对叶片形状进行优化减小阻力系数;受安全壳传热需求限制,上升通道与下降通道之间的间距比取1∶3是合适的。
The aerodynamic drag characteristics of passive containment cooling system (PCS) in the third generation advanced nuclear power plant are analyzed using a well-established computational fluid dynamics (CFD) program. The results show that the drag coefficient of the air passage changes little with the increase of the flow rate, and the main resistance appears at the air inlet, the guide vane and the ascending passage. The guide vane design can reduce the flow loss and the drag coefficient can be reduced by optimizing the shape of the vane ; Limited by the containment heat transfer requirements, the spacing between the ascending and descending passages is 1: 3.