螺旋管蒸汽发生器流体弹性不稳定性简化分析

Simplified Theoretical Analysis of Fluid-Elastic Instability for Helical Tube Steam Generator in Cross-flow

利用平面圆环模拟螺旋管结构,采用平面圆环动态固有特性解析结果,结合流体力慨念,提出一种螺旋管蒸汽发生器失稳临界流速的简化解析分析方法.采用该方法对20MW模型堆和200MW模型堆进行了流体弹性不稳定性分析,并与采用直管流弹不稳公式的计算结果进行了比较.试验结果验证了本文方法的可靠性.

Plane circle-the simplified model of helical tube is considered. The theoretical results of natural vibration properties for plane circle and the concept of fluid force are used to give a new simplified theoretical method, with which the instability critical velocity of helical tube steam generator could be worked out. This method is used to study the Fluid-elastic instability of the 20MW nuclear reactor model and 200MW nuclear reactor model, and the result of this method is compared with that of the method used in general tube arrays. This method is confirmed to be reliable by experiment.