横纹槽管内插断续扭带复合强化传热的实验研究

发布时间：2017-12-26 18:05

本文关键词：横纹槽管内插断续扭带复合强化传热的实验研究　出处：《热能动力工程》2016年09期 　论文类型：期刊论文

【摘要】：本研究以导热油为工质,在层流和过渡流(Re7 000)范围内研究横纹槽管内插三种不同规格的断续扭带和同扭率(Y=4.13)连续扭带的流动与强化换热特性。将实验数据进行回归分析得到了阻力系数和Nu的实验关联式,为复合强化传热的计算提供了理论依据。研究表明:横纹槽管内插扭带的综合换热性能优于内插相同扭带的光管,横纹槽管内插长度为66 mm的断续扭带的综合换热性能要优于同条件下内插连续扭带的光管。实验结果可为换热器的改造和新型换热器的设计提供理论依据。
[Abstract]:In this study, the flow and heat transfer characteristics of continuous twisted tape with three different specifications and the same twist rate (Y=4.13) were studied in laminar and transitional flow (Re7 000) with heat conducting oil as working fluid. The experimental correlation of the resistance coefficient and Nu is obtained by the regression analysis of the experimental data, which provides a theoretical basis for the calculation of composite enhanced heat transfer. The results show that the comprehensive heat transfer performance of the twisted tape is better than that of the same twisted tape. The heat transfer performance of the interrupted twisted tape with a length of 66 mm is better than that of the continuous twisted tape tube under the same condition. The experimental results can provide a theoretical basis for the transformation of the heat exchanger and the design of a new type of heat exchanger.
【作者单位】：西安建筑科技大学环境与市政工程学院;西安交通大学动力工程多相流国家重点实验室;
【基金】：国家科技支撑计划(2012BAA12B02)
【分类号】：TK124
【正文快照】： 引言强化传热技术是指能显著改善传热性能的节能技术[1],实验采用将两种强化传热方式进行复合来研究其综合传热性能,一方面采用横纹槽管增大了传热面积。横纹槽管是20世纪70年代中期出现的一种高效换热元件,可以显著强化管内单相流体的传热效果,最早是由莫斯科航空学院E.K.Kal

【相似文献】