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LES of Normally Impinging Elliptic Air-Jet Heat Transfer at Re=4400

Published online by Cambridge University Press:  09 January 2017

Yongping Li ,
Qizhao Lin  and
Zuojin Zhu
Yongping Li
Affiliation:
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
Qizhao Lin
Affiliation:
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
Zuojin Zhu*
Affiliation:
Faculty of Engineering Science, University of Science and Technology of China, Hefei, Anhui 230026, China
*
*Corresponding author. Email:zuojin@ustc.edu.cn (Z. J. Zhu)
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Abstract

Jet impingement induced heat transfer is an important issue in engineering science. This paper presents results of large eddy simulation (LES) of normally impinging elliptic air-jet heat transfer at a Reynolds number of 4400, with orifice-to-plate distance fixed to be 5 in the unit of jet nozzle effective diameter . The elliptic aspect ratio (a/b) is 3/2. While the target wall is heated under some condition of constant heat flux. The LES are carried out using dynamic subgrid model and Open-FOAM. The distributions ofmean velocity components, velocity fluctuations, and subgrid stresses in vertical and radial directions, and the Nusselt numbers involving heat transfer through the target wall are discussed. The comparison with existing experimental and numerical results shows good agreement.

Keywords

Large eddy simulationimpinging air-jetorifice-to-plate distancesubgrid heat fluxelliptic aspect ratio
Type
Research Article
Information
Advances in Applied Mathematics and Mechanics , Volume 9 , Issue 2 , April 2017 , pp. 485 - 500
Copyright
Copyright © Global-Science Press 2017 

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