H形鳍片管束传热与阻力特性实验研究_袁益超.pdfVIP

上 海 理 工 大 学 学 报 　第26 卷　第 5 期 J.University f Shanghai f r Science and T echn l gy V l.26 　N .5　2004 　 　　文章编号:1007-6735 (2004)05-0457-04 H 形鳍片管束传热与阻力特性实验研究 刘聿拯, 　袁益超, 　徐世洋, 　吴文彬 (上海理工大学 动力工程学院, 上海　200093) 摘要:为实现H 形鳍片管束的性能与结构的优化设计, 在对H 形鳍片管束的传热机理进行分析的 基础上, 对优化结构的H 形鳍片管束的传热与阻力特性进行了模化实验研究, 并将实验结果与有 关方法的计算结果进行了比较, 为H 形鳍片管束的设计提供了可靠的依据. 关键词:H 形鳍片管束;传热;阻力;实验研究 + 中图分类号:TK 229.92 9　　　文献标识码:A Experimental study on the characteristics of heat transfer and flow resistance for H-type finned tube banks LIU Yu-zheng, 　YUAN Y i-chao, 　XU Shi-yang, 　WU Wen-bing (College of Power Engineering, University of Shanghai f or Science and Technology , Shanghai200093 , China) Abstract:The H-type finned tube banks are lately used in heat rec very steam generat rs (HRSG)and als in large capacity utility b ilers because f a series f advantages.H wever, because there exist limitati ns f the present achievements as regards the characteristics f heat transfer and fl w resistance f r H-type finned tube banks due t vari us reas ns, they can′t meet the demands f the practical applicati ns.Based n the analysis f the heat transfer mechanism f r H-type finned tube banks, the heat transfer and fl w resistance characteristics f ptimized H-type finned tube banks are studied by means f m deling experiments.The c mparis n between the experimental results and the calculating results by c rresp nding meth ds is carried ut.The research pr - vides a reliable basis f r design f H-type finned tube banks. Key words:H -type f inned tube ban s;heat transf er ;f low resistance;experimental research 　　鳍片管束作为换热元件, 由于其制造工艺简单, 了进口和尾部分离区传热恶化对整个鳍片传热的影 能增大管外换热面积, 强化传热, 同时因单位体积内 响, 从而提高了鳍片的平均对流换热系数和鳍片效 换热面积增大而使换热器结构紧凑