对流传热系数测定的探讨

摘要

测定了不同流速下的各种传热数据，用实验法和理论计算法给出管内热膜系数a测、a计、Nu测、Nu计及总传热系数K测、K计的值，分析了实际法和理论法得到的传热系数的区别．在传热管中加入螺旋弹簧作为强化元件后，对各种数据的计算及与理论值之间的差别进行了分析．%Analysis on experimental method and theoretical calculation method of giving the heat transfer coefficient of α测, α计, Nu测, Nu计 and the total heat transfer coefficient K测, K计, and analysis on the difference of the results by a more practical method and the theory method. Key words： convective heat transfer; Reynolds number; heat transfer coefficient