【作者】 郭延明； 高璞珍； 黄振；

【Author】 GUO Yan-ming~1,GAO Pu-zhen~1,HUANG Zhen~2 (1.College of Nuclear Science and Technology,Harbin Engineering University,Harbin of Heilongjiang Prov.150001, China;2.Nuclear Power Institute of China,Chengdu of Sichuan Prov.610041,China)

【机构】 哈尔滨工程大学核科学与技术学院； 中国核动力研究设计院；

【摘要】 对摇摆条件下竖直单管单相水强迫循环传热特性进行了实验研究。实验是在最大摇摆角度为10°、15°和20°,摇摆周期为7.5s、10s、15s和20s,及雷诺数由6000到15000的条件下进行的。实验结果表明,摇摆运动下强制对流的换热能力受到了削弱。摇摆越剧烈,同等平均流量下实验段的换热系数越低。对实验数据分析发现适用于稳态计算换热系数的经验公式用在摇摆工况下误差较大,最后通过整理实验数据拟合出适用于摇摆运动下的强制循环换热经验关系式。更多还原

【Abstract】 A series of single-phase forced circulation tests in a vertical tube with rolling motion were performed in order to investigate effects of rolling motion on thermal-hydraulic characteristics.The amplitudes of the rolling motion in the tests were 10°,15°and 20°.The rolling periods were 7.5s,10s,15s and 20s.The Reynolds number was from 6000 to 15000.Heat transfer in the test tube is bated by the rolling motion.As the test-bed rolling more acutely,the heat transfer coefficient of the test tube becomes smaller when the mass flow rate in the test tube is a constant.The heat transfer coefficient calculated by the formula which is for stable state doesn’t fit very well with that from experiments.At last a formula for calculating heat transfer in rolling motion was introduced.更多还原