强制流动蒸发系统水动力特性的数值分析与综合—（Ⅱ）直流锅炉水动力不稳定性的数值分析与综合

Numerical Analysis and Synthesis of Hydraulic Dynmaic Characteristics of Forced Flowing Steam Generating System (Ⅱ)Numerical Analysis and Synthesis of Hydraulic dynamic Unstability of Once-through Boilers

参考《蒸汽发生系统通用动力学模型》一文中所提供的数学模型和数值方法，对直流锅炉蒸发系统的水动力不稳定性进行了全面的数值分析与综合，讨论了系统内特性和外特性对两相流体流动不稳定性的影响，探讨了系统整体脉动与管间脉动间的联系与区别。最后，在此基础上提出了水动力特性本质稳定蒸发系统和非本质稳定蒸发系统两个基本概念。有关的结论对于蒸汽发生系统的设计。

This paper is the continuation of paper,In this paper the comprehensive numerical analysis and synthesis of hydraulic dynamic unstability of the once-through boiler steam generating system using the mathematical model and numerical method which are suggested in paper are presented and effects of system's inner and external characteristics on two-phase flow unstability are discussed.Then the relation and difference between system's integral and intertube pulsation are studied and on these basis,two fundamental conceptions,hydraulic dynamic intrinsic stable system and non-stable system,are suggested.The conclusions from the paper are valuable to the design and operation of steam generating systems and optimization of experimental schemes.