稳压器波动接管内套管的温度保护作用

Experiment on Temperature Protection of Sleeve in Surge Line Nozzle of Pressurizer

在西安交通大学动力工程多相流国家重点实验室水力试验台上进行了51稳压器波动接管的瞬态温度模拟试验。实验研究了稳压器波动接管在密封套管和非密封套管两种结构形式,流体在正波动和负波动两种流动模式下,Re在4500～750000时,各测试点的瞬态温度变化。实验结果表明:密封套管具有良好的温度保护作用,能够有效保护波动接管免受热冲击和热疲劳作用;非密封套管的保护作用在低流速时微弱,高流速时基本消失。

Simulative experiment focused on transient temperature is performed on a 5:1 model of surge line nozzle, with sealed sleeve or unsealed sleeve, of pressurizer in PWR, under inlet and outlet flow condition. The range of Re is 4500-750000. The conclusion is as follows: sealed sleeve can effectively protect surge line nozzle from thermal shock and thermal fatigue; Sealed sleeve has better protection than unsealed sleeve; at low flow rate unsealed sleeve has some protection from temperature, but it loses its protection at high flow rate.