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Impingement Air Cooling With Synthetic Jets Over Small and Large Heated Surfaces

[+] Author Affiliations
Jivtesh Garg, Mehmet Arik, Stanton Weaver

GE Global Research Center, Niskayuna, NY

Paper No. IPACK2005-73211, pp. 277-285; 9 pages
doi:10.1115/IPACK2005-73211
From:
  • ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems collocated with the ASME 2005 Heat Transfer Summer Conference
  • Advances in Electronic Packaging, Parts A, B, and C
  • San Francisco, California, USA, July 17–22, 2005
  • Conference Sponsors: Heat Transfer Division and Electronic and Photonic Packaging Division
  • ISBN: 0-7918-4200-2 | eISBN: 0-7918-3762-9
  • Copyright © 2005 by ASME

abstract

Increasing heat loads and the need for improving natural convection heat transfer has brought micro fluidic technology into the thermal management of electronics. A maximum air velocity of 90 m/s from an 800 μm hydraulic diameter orifice was achieved through specially designed synthetic jets. The resonance frequency for a particular jet was determined through the effect of exit velocity magnitude, as well as power consumption. During the experiments, the operating frequency for the jet was varied between 3000 and 5000 Hz. Heat transfer augmentation experiments were performed on two heaters with different sizes to understand the size effect. A microscopic infrared thermal imaging technique was used to acquire fine scale temperature measurements. While an earlier study focused on a heater with a surface area of 160 mm2 , the current study used a heater with a surface area of 1450 mm2 , which is approximately 9 times larger. The effect of jet-location, driving-voltage, frequency and heater-power were studied during the experiments. A heat transfer coefficient enhancement over natural convection of 10 times, with the smaller heater, and 5 times, with the larger heater was measured.   This paper was also originally published as part of the Proceedings of the ASME 2005 Heat Transfer Summer Conference.

Copyright © 2005 by ASME
Topics: Cooling , Jets

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