Optimum Profiles for Asymmetrical Longitudinal Fins in Annular Ducts
作者:
Giampietro Fabbri,
期刊:
Heat Transfer Engineering
(Taylor Available online 2000)
卷期:
Volume 21,
issue 2
页码: 40-52
ISSN:0145-7632
年代: 2000
DOI:10.1080/014576300271013
出版商: Informa UK Ltd
数据来源: Taylor
摘要:
In the present work the geometry of annular ducts with asymmetrical longitudinal fins is optimized in order to enhance the heat transfer under laminar coolant flow conditions. The heat transferred is also maximized for a given amount of material or hydraulic resistance. Polynomial profiles are assigned to the two lateral fin surfaces. Velocity and temperature distributions on the annular duct cross section are determined with the help of a finite-element model. A global heat transfer coefficient and an equivalent Nusselt number are then calculated. Lastly, optimum asymmetrical fins obtained by means of a genetic algorithm are shown for different situations and their performance is compared with those of optimum symmetrical fins.
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