On the impingement of heat transfer using swirled air jets

Kotb, Ashraf and Askar, Hamada and Saad, Hany (2023) On the impingement of heat transfer using swirled air jets. Frontiers in Mechanical Engineering, 9. ISSN 2297-3079

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Abstract

Experimental analyses were conducted under identical experimental conditions on the heat transfer between a constant heat flux flat plate and a round air jet for both conventional and swirled jets. Vane-type swirl generators inserted at the nozzle exit were used to produce a swirl. The experimental measurements were performed at a fixed Reynolds number value (Re = 23,000) calculated on the jet tube’s inside diameter. A comparison between conventional air jets and swirl jets with swirl numbers of S = 0, 0.19, 0.42, and 0.72 was presented for the different nozzle-to-plate spacings Z/D = 2, 6, and 10. The results show that heat transfer to the plate decreases when the nozzle-to-plate distance increases. In addition, increasing the swirl number S increases heat transfer uniformity but decreases global heat transfer. At the low plate-to-jet distance Z/D = 2, the point of maximum heat transfer is shifted to a radial position depending on the swirl number. Also, for both Z/D = 6 and 10, the stagnation point and stagnation region heat-transfer enhances only for swirl numbers 0 and 0.19.

Item Type: Article
Subjects: Open Article Repository > Engineering
Depositing User: Unnamed user with email support@openarticledepository.com
Date Deposited: 07 Jun 2023 05:13
Last Modified: 23 Oct 2024 04:04
URI: http://journal.251news.co.in/id/eprint/1576

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