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文章编号： 16726987（2018）06009207； DOI： 10.16351/j.16726987.2018.06.015
郭瑞恒1， 张爱凤1， 何燕1*， 李蔚2
(1.青岛科技大学 机电工程学院，山东 青岛 266061； 2.浙江大学 能源工程学院，浙江 杭州 310027）
摘要： 在对比光滑管的基础上对3种水平强化涟漪纹管（1EHT、2EHT1、2EHT2）的管内冷凝换热特性进行了实验研究。保持制冷剂低质量流速条件下，统一采用测试段外径127 mm,内径115 mm的强化管进行实验。实验选用R410A制冷剂为工质，质量流量为800~260 kg·(m2·s)-1,测试段干度为09~02,入口压力对应饱和温度约为320 K。测试结果表明：随着质量流量的增加，HTC和压降也都不同程度的增大。换热强化比相对光滑管提高13~195倍。1EHT管具有最好的传热效率，主要原因是增大界面湍流导致二次流产生等效果，而2EHT管管型两种表现相似的传热特性，3种强化管的摩擦压降比光管增强的幅度更大，损耗随着面积的增加而增加，因为强化管的坑深度起主要的影响因素，但三者都表现出比光滑管更加优越的传热特性。
关键词： 热工学； 涟漪纹管； 换热系数； 压降
中图分类号： TK 122文献标志码： A
引用格式： 郭瑞恒， 张爱凤， 何燕， 等. 水平强化涟漪纹管的管内冷凝换热实验研究\[J\]. 青岛科技大学学报（自然科学版）， 2018， 39（6）： 9298.
GUO Ruiheng, ZHANG Aifeng, HE Yan，et al.Experimental investigation on condensation heat transfer characteristics of horizontal enhanced EHT tubes\[J\]. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2018, 39(6)： 9298.
Experimental Investigation on Condensation Heat Transfer Characteristics of
Horizontal Enhanced EHT Tubes
GUO Ruiheng1， ZHANG Aifeng1， HE Yan1， LI Wei2
(1.College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China;
2.Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: The condensation heat transfer characteristics of three kinds of EHT tubes (1EHT, 2EHT1, 2EHT2) were investigated experimentally on the basis of the comparison of smooth tubes. Under the condition of keeping the low mass flow rate of the refrigerant, a test tube with a diameter of 127 mm and an inner diameter of 115 mm was tested. The experiment uses R410A refrigerant as working fluid, the mass flow rate is 60—240 kg·(m2·s)-1, the test section is 09—02, and the inlet pressure is about 320 K. The results show that HTC and pressure drop increase with the increase of mass flow rate. The relative enhancement factor is 13—195 times as high as that of smooth tube, 1EHT tube has the best heat transfer efficiency in the low mass flow, the main reason is the increase of interfacial turbulence leads to the two flow effect, and the 2EHT tube showed similar heat transfer characteristics, three enhanced friction pressure drop than the light tube enhanced tube a larger, because strengthening the pit depth tube from the main influencing factors, but the three are more superior than the heat transfer characteristics of tube smooth.
Key words: thermal engineering; EHT tube; heat transfer coefficient; pressure drop
收稿日期： 20171119
基金项目： 国家自然科学基金项目(51506104, 51210011).
作者简介： 郭瑞恒(1991—)，男，硕士研究生.*通信联系人.
