Hydrothermal behavior of a novel conical twisted strip turbulator in a heated tube: A numerical analysis

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-04-21 DOI:10.1016/j.csite.2025.106186

Azher M. Abed , Bhavesh Kanabar , T. Ramachandran , Aman Shankhyan , Jasgurpreet Singh Chohan , A. Karthikeyan , Deepak Gupta , Bashir Salah , Waqas Saleem

{"title":"Hydrothermal behavior of a novel conical twisted strip turbulator in a heated tube: A numerical analysis","authors":"Azher M. Abed , Bhavesh Kanabar , T. Ramachandran , Aman Shankhyan , Jasgurpreet Singh Chohan , A. Karthikeyan , Deepak Gupta , Bashir Salah , Waqas Saleem","doi":"10.1016/j.csite.2025.106186","DOIUrl":null,"url":null,"abstract":"<div><div>The increasing use of heated pipes and heat exchangers has created a pressing need to enhance thermal efficiency. This research introduces a novel turbulator design known as the conical twisted strip turbulator. The turbulator design resembles a cone and is composed of several twisted strip tentacles. This unique configuration is expected to generate strong rotational and radial flow patterns, leading to enhanced heat transfer. A numerical analysis was conducted using the RNG k-epsilon model to investigate various geometric parameters of the turbulator. The study examined the twisted angle, which varied from 60 to 270°, the number of twisted strip tentacles, which ranged from 4 to 10, and the width of the twisted strip tentacles, which spanned from 1 to 4 mm. This comprehensive approach allows for a thorough understanding of how these parameters influence the hydrothermal characteristics. The findings reveal that incorporating the conical twisted strip turbulator can significantly elevate heat transfer and pressure drop—by factors of up to 3.31 and 5.45, respectively—when compared to a plain tube design. The optimal performance enhancement criteria of 1.93 was achieved with a turbulator featuring a twisted angle of 180°, six twisted strip tentacles, and a strip width of 4 mm. Moreover, the results showed that heat transfer and pressure drop are directly related to the twisted angle, the number of twisted strip tentacles, and the width of the twisted strip. However, the performance enhancement criteria may improve or worsen as these parameters increase.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"71 ","pages":"Article 106186"},"PeriodicalIF":6.4000,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Case Studies in Thermal Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214157X25004460","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"THERMODYNAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

The increasing use of heated pipes and heat exchangers has created a pressing need to enhance thermal efficiency. This research introduces a novel turbulator design known as the conical twisted strip turbulator. The turbulator design resembles a cone and is composed of several twisted strip tentacles. This unique configuration is expected to generate strong rotational and radial flow patterns, leading to enhanced heat transfer. A numerical analysis was conducted using the RNG k-epsilon model to investigate various geometric parameters of the turbulator. The study examined the twisted angle, which varied from 60 to 270°, the number of twisted strip tentacles, which ranged from 4 to 10, and the width of the twisted strip tentacles, which spanned from 1 to 4 mm. This comprehensive approach allows for a thorough understanding of how these parameters influence the hydrothermal characteristics. The findings reveal that incorporating the conical twisted strip turbulator can significantly elevate heat transfer and pressure drop—by factors of up to 3.31 and 5.45, respectively—when compared to a plain tube design. The optimal performance enhancement criteria of 1.93 was achieved with a turbulator featuring a twisted angle of 180°, six twisted strip tentacles, and a strip width of 4 mm. Moreover, the results showed that heat transfer and pressure drop are directly related to the twisted angle, the number of twisted strip tentacles, and the width of the twisted strip. However, the performance enhancement criteria may improve or worsen as these parameters increase.

查看原文本刊更多论文

一种新型锥形扭带紊流器在加热管内的热液行为：数值分析

越来越多地使用加热管和热交换器，产生了迫切需要提高热效率。本研究介绍了一种新的紊流器设计，即锥形扭带紊流器。紊流器的设计类似于一个圆锥体，由几个扭曲的条形触须组成。这种独特的结构有望产生强烈的旋转和径向流动模式，从而增强传热。采用RNG k-epsilon模型对紊流器的各种几何参数进行了数值分析。本研究检测了扭曲角度为60 ~ 270°，扭曲条触须的数量为4 ~ 10条，扭曲条触须的宽度为1 ~ 4 mm。这种全面的方法可以全面了解这些参数如何影响热液特征。结果表明，锥形扭带紊流器与普通管相比，传热系数和压降分别提高了3.31倍和5.45倍。紊流器的涡流角为180°，涡流触须为6条，涡流触须宽度为4 mm，紊流器的优化性能为1.93。实验结果表明，换热和压降与扭带的角度、扭带触手的数量和扭带的宽度直接相关。但是，性能增强标准可能会随着这些参数的增加而改善或恶化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.