An experimental investigation was conducted to examine the use of microstructured surfaces to enhance jet impingement heat transfer. Three microstructured surfaces were evaluated: a microfinned surface, a microporous coating, and a spray pyrolysis coating. The performance of these surface coatings/structures was compared to the performance of simple surface roughening techniques and millimeter-scale finned surfaces. Experiments were conducted using water in both the free- and submerged-jet configurations at Reynolds numbers ranging from 3300 to 18,700. At higher Reynolds numbers, the microstructured surfaces were found to increase Nusselt numbers by 130% and 100% in the free- and submerged-jet configurations, respectively. Potential enhancement mechanisms due to the microstructured surfaces are discussed for each configuration. Finally, an analysis was conducted to assess the impacts of cooling a power electronic module via a jet impingement scheme utilizing microfinned surfaces.
Microstructured Surfaces for Single-Phase Jet Impingement Heat Transfer Enhancement
Manuscript received February 22, 2012; final manuscript received November 4, 2012; published online June 24, 2013. Assoc. Editor: S. A. Sherif.
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Moreno, G., Narumanchi, S., Venson, T., and Bennion, K. (June 24, 2013). "Microstructured Surfaces for Single-Phase Jet Impingement Heat Transfer Enhancement." ASME. J. Thermal Sci. Eng. Appl. September 2013; 5(3): 031004. https://doi.org/10.1115/1.4023308
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