【作者】 李昊； 孙中宁； 谷海峰； 徐慧强；

【Author】 LI Hao;SUN Zhongning;GU Haifeng;XU Huiqiang;Discipline Laboratory of Nuclear Safety and Simulation Technology,Harbin Engineering University;

【机构】 哈尔滨工程大学核安全与仿真技术国防重点学科实验室；

【摘要】 在水冷条件下,对含有不凝性气体的蒸汽在水平管内强迫对流冷凝换热进行了实验研究,并根据实验结果得到了计算平均冷凝换热系数的经验关联式。结果表明,平均冷凝换热系数随着不凝性气体含量和过冷度的增加而减小;随着入口流速和压力的增加而增大。实验拟合得到的换热关联式与实验结果符合较好,偏差在±20%以内。更多还原

【Abstract】 An experimental investigation was conducted to evaluate the heat transfer capacity of the steam forced convection condensation in the presence of non-condensable gases(e.g. air) in a horizontal tube. A correlation for average condensation heat transfer coefficient of steam with air has been developed. Under the same pressure with the same inlet velocity, the effect of the gases mass fraction and the wall sub-cooling on the condensation heat transfer coefficient with non-condensable gases was negative; while the effect of the inlet velocity and pressure in the tube on the condensation heat transfer coefficient with air was Positive. The new correlation shows a great agreement with the experiment results with an error of ±20% between the calculated and experimental values.更多还原