期刊
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
卷 87, 期 -, 页码 85-93出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2014.08.007
关键词
Impinging pulsed air jet; Heat transfer; Turbulence modelling; Second-moment closure; Ratio of on time to total cycle time
资金
- Russian Scientific Foundation [14-19-00402]
- Russian Science Foundation [14-19-00402] Funding Source: Russian Science Foundation
The flow structure and heat transfer of the air pulsed turbulent impinging jet are studied numerically. The gas turbulence is modelled with the Reynolds stress model. The effects of pulse frequency, ratio of on time to total cycle time, distance between pipe outlet and impinging flat plate and Reynolds number on heat transfer are numerically studied. The impingement heat transfer increases with distance from the pipe edge and target surface. The heat transfer decreases at high distance from the pipe edge and target surface. An increase in the Reynolds number causes reduction of heat transfer enhancement. Reduced heat transfer in comparison with the steady-state impinging jet is typical in the range of low frequencies of the pulse impinging jet. (C) 2014 Elsevier Masson SAS. All rights reserved.
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