论文部分内容阅读
两相流动的各种现象在液体冷却的反应堆内是极端重要的。例如,在强制循环的沸水堆中,当流量再分配和传热受堆芯部压降影响强烈时,确定其两相压降则尤为重要。本文以常用的均匀流模型和分离流模型为例,讨论了两相流动的基本方程。此外,介绍了考虑流体的性质、汽水混合物的重量含汽量 x 以及质量流速等影响的几个近代计算二相压降的方法。
The phenomena of two-phase flow are extremely important in liquid-cooled reactors. For example, in a forced-circulation boiling water reactor, determining the two-phase pressure drop is particularly important when redistribution of flow and heat transfer are strongly influenced by the core pressure drop. In this paper, the commonly used uniform flow model and the separation flow model are taken as an example to discuss the basic equations of two-phase flow. In addition, several recent methods for calculating the two-phase pressure drop considering the fluid properties, the steam content of the steam-water mixture and the mass flow rate are introduced.