Author
Ghaffari, Omidreza, Ikhlaq, Muhammad, Arık, Mehmet
Publication Date
2015-07
Publication Place
-
World Scientific Publishing Co
Subject
Synthetic jet, Small jet to surface spacing, Impinging jet, Heat transfer, Electronics cooling, Cooling efficiency, COP
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
1229-862X
Record ID
0a64edf5-c171-4fc9-9c31-6aa774cc9097
Library Location
Mechanical Engineering
Date
2015-07
Notes
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text
According to recent trends in the field of miniature electronics, the need for compact cooling solutions compatible with very thin profiles and small footprint areas is inevitable. Impinging synthetic jets are recognized as a promising technique for cooling miniature surfaces like laptops, tablets, smart phones and slim TV systems. Effect of jet to cooled surface spacing is crucial in cooling performance as well as predicting Nusselt number for such spacing. An experimental study has been performed to investigate the cooling performance of two different synthetic jets actuated with piezoelectric actuators cooling over a vertical surface. Results showed that a major degradation of heat transfer when jets are close to the surface is occurred. Slot synthetic jets showed a better performance in terms of coefficient of performance (COP) than semi-confined circular jets for small jet to surface spacing. Later, a correlation is proposed for predicting Nu number for a semi-confined circular synthetic jet accounting the effects of Re number (500≤Rej≤1150500≤Rej≤1150), jet-to-surface spacing (H∕D=2H∕D=2 and H∕D=4H∕D=4) and the stroke length (1.75≤L0∕D≤4.751.75≤L0∕D≤4.75 and L0∕H<2.5L0∕H<2.5). It is found that correlation can provide predictions with an R2R2 value of over 98%.
DOI
10.1142/S2010132515500248
Cilt
23
