Numerical and experimental investigations on longitudinal vortex generator for heat transfer enhancement in rectangular channel

Zheng Li, Yangyang Chen, Xianchen Xu, Kuojiang Li, Zhaoqing Ke, Keyu Zhou, Hsiu Hung Chen, Guoliang Huang, Chung-Lung Chen, Chien Hua Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

In this article, longitudinal vortex generator (LVG) for heat transfer enhancement in rectangular channel is investigated numerically and experimentally. Two symmetrical delta shaped plates are placed vertically at the bottom of a rectangular channel and a pair of longitudinal vortices are generated and transferred downstream. These vortices were clockwise and counterclockwise, respectively. Correspondingly, the flow has the tendency to shoot to the surface opposite to the one with the LVG, then it separates into two steams and runs back to the LVG surface. Local heat transfer enhancement in the rectangular channel varies due to this fountain effect. Size effects were discussed for two types of LVG. With the same height, the wider LVG has better thermal performance within the rectangular geometry limit. One specific LVG was fabricated and tested experimentally and results show significant heat transfer enhancement. It indicated that the LVG can enhance the heat transfer significantly and the numerical results are reliable.

Original languageEnglish
Title of host publicationHeat Transfer Equipment; Heat Transfer in Multiphase Systems; Heat Transfer Under Extreme Conditions; Nanoscale Transport Phenomena; Theory and Fundamental Research in Heat Transfer; Thermophysical Properties; Transport Phenomena in Materials Processing and Manufacturing
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791857892
DOIs
StatePublished - 1 Jan 2017
EventASME 2017 Heat Transfer Summer Conference, HT 2017 - Bellevue, United States
Duration: 9 Jul 201712 Jul 2017

Publication series

NameASME 2017 Heat Transfer Summer Conference, HT 2017
Volume2

Conference

ConferenceASME 2017 Heat Transfer Summer Conference, HT 2017
CountryUnited States
CityBellevue
Period9/07/1712/07/17

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    Li, Z., Chen, Y., Xu, X., Li, K., Ke, Z., Zhou, K., Chen, H. H., Huang, G., Chen, C-L., & Chen, C. H. (2017). Numerical and experimental investigations on longitudinal vortex generator for heat transfer enhancement in rectangular channel. In Heat Transfer Equipment; Heat Transfer in Multiphase Systems; Heat Transfer Under Extreme Conditions; Nanoscale Transport Phenomena; Theory and Fundamental Research in Heat Transfer; Thermophysical Properties; Transport Phenomena in Materials Processing and Manufacturing [HT2017-4976] (ASME 2017 Heat Transfer Summer Conference, HT 2017; Vol. 2). American Society of Mechanical Engineers. https://doi.org/10.1115/HT2017-4976