摇摆引起的波动对单相自然循环换热的影响  

Effect of Fluctuation Caused by Rolling Motion on Single-Phase Natural Circulation Heat Transfer

作　　者：贾辉[1] 谭思超[1] 高璞珍[1] 阎昌琪[1] 

机构地区：[1]哈尔滨工程大学核科学与技术学院,哈尔滨150001

出　　处：《核动力工程》2010年第S1期44-48,共5页Nuclear Power Engineering

基　　金：国家自然科学基金资助项目(50806014);空泡物理和自然循环国家级重点实验室基金资助项目(9140C7105020805)

摘　　要：对摇摆和不摇摆运动下的单相自然循环换热特性进行了实验研究。根据实验数据,分析了摇摆和非摇摆条件下的换热系数,引入加速度影响的雷诺数拟合了适用于摇摆运动下自然循环流动换热计算关系式。结果表明,摇摆引起的流动波动增加了流动换热系数,换热系数随着摇摆振幅和频率的增加而增加;由于管壁蓄热的作用,流动速度和换热系数的变化不同相。新拟合关系式的计算结果和实验结果符合良好。Experimental studies of single-phase natural circulation flow and heat transfer under a rolling motion condition are performed. Experiments with and without rolling motions are conducted,and the effects of rolling motion on natural circulation heat transfer are obtained. The experimental results show that the flow fluctuation caused by rolling motion enhances the heat transfer,and the heat transfer coefficient of natural circulation flow increases with the rolling amplitude and frequency. Analysis of data shows that the effect of heat capacity of heated tube can not be neglected and Reynolds number of acceleration is introduced to employ the effect of heat capacity. Based on the experimental data,an empirical equation for the heat transfer coefficient under rolling motion is achieved. The calculated results agree well with experimental data.

关 键 词：摇摆运动 自然循环 流动波动 换热 

分 类 号：TL33[核科学技术—核技术及应用]