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The current state on the thermal performance of twisted tapes: A geometrical categorisation approach
Chemical Engineering and Processing: Process Intensification ( IF 3.8 ) Pub Date : 2020-05-29 , DOI: 10.1016/j.cep.2020.107929
Hakan Bucak , Fuat Yılmaz

Twisted tapes are used in thermal performance intensification of heat exchangers. The present paper focuses on the last eleven years experimental and numerical studies of the twisted tapes that are inserted into a plain circular horizontal tube with different kind of working fluids such as air, water, nanofluids, high viscosity oil, servotherm medium oil, microencapsulated phase change material slurry, non-Newtonian tomato puree, carboxymethyl cellulose and CuO mixture, lubricating oil. It aims to be a summarising and guiding source with detailed tables, figures, graphs and a criticization for the researchers. Correlation equations of friction and Nusselt number for “plain tube” and “classical twisted tape inserted plain tube” were summarised for laminar/turbulent regimes. Equipment (or used software) list was made, and items were explained for experimental and numerical works. Ranges of some critical parameters were presented from the selected works. Twisted tapes were categorised according to their geometrical designs. Then, performance considerations were made on them (in the category itself) while the flow regimes were also taken into account. Finally, by considering all the geometrical variation groups, the relation between design and performance was tried to be figured out. Some geometrical design suggestions were given for twisted tapes.



中文翻译:

扭曲带热性能的当前状态:一种几何分类方法

扭曲带用于热交换器的热性能增强。本文着重于近十一年来对扭曲带的实验和数值研究,这些扭曲带被插入到具有不同类型的工作流体(如空气,水,纳米流体,高粘度油,伺服热介质油,微囊化相)的普通圆形水平管中。改变物料浆液,非牛顿番茄泥,羧甲基纤维素和CuO的混合物,润滑油。它的目的是成为摘要和指导性资源,其中包括详细的表格,图形,图表和对研究人员的批评。对于层流/湍流状态,总结了“普通管”和“经典扭带插入式普通管”的摩擦和努塞尔数的相关方程。列出了设备(或使用的软件)清单,并解释了实验和数值工作的项目。从选定的作品中提出了一些关键参数的范围。扭曲的磁带根据其几何设计进行分类。然后,对它们(在类别本身)进行了性能方面的考虑,同时还考虑了流动方式。最后,通过考虑所有几何变化组,试图找出设计与性能之间的关系。提出了一些关于扭曲带的几何设计建议。通过考虑所有几何变化组,试图找出设计与性能之间的关系。提出了一些关于扭曲带的几何设计建议。通过考虑所有几何变化组,试图找出设计与性能之间的关系。提出了一些关于扭曲带的几何设计建议。

更新日期:2020-05-29
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