Investigation Of Heat Transfer Enhancement Within A Concentric Annulus Using Helicoil Turbulators

Abstract

Effective heat exchange is key for many energy applications including heat exchangers, heat extraction from heat source, and heat rejection to ambient thermal sink. This paper focuses on the investigation for a specific heat exchange configuration, namely heat removal within a concentric annular passage. Numerical optimization was performed to increase heat transfer and minimize pressure drop within the annulus by using helicoil turbulators. A genetic algorithm was used to determine the most efficient design by changing the turbulator shape, pitch, and blockage ratio while maintaining a constant Reynolds number of 25,000. Results show that turbulence and heat transfer increase with a higher blockage ratio and smaller pitch but the pressure drop is subsequently increased as well.

Publication Date

1-1-2017

Publication Title

15th International Energy Conversion Engineering Conference, 2017

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2017-4785

Socpus ID

85086949826 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85086949826

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