Abstract
On the impingement heat transfer data, the experimental studies of air and liquid jets impingement to the flat surfaces were collected and critically reviewed. The oblique impingements of both single circular and planar slot jets were considered in particular. The review focused on the surface where the jet impingement cooling technique was utilized. The nozzle exit Reynolds numbers based on the hydraulic diameter varied in the range of 1,500–52,000. The oblique angles relative to the plane surface and the dimensionless jet-to-plate spacing vary in the range of 15°–90° and 2–12 respectively. The review suggested that the magnitude of maximum heat transfer shifted more for air jets compared with the liquid jets. The drop in the inclination angle and the jet-to-plate separation led to the increase in the asymmetry of heat transfer distribution. The displacement of maximum Nusselt number (heat transfer) locations was found to be sensitive to the inclination angle and the smaller jet-to-plate distance. Also, the Nusselt number correlations proposed by various researchers were discussed and compared with the results of the cited references.
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The authors would like to acknowledge the support from Science and Engineering Research Board, Department of Science and Technology, Government of India, for the research grant (ECR/2016/000768).
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Pawar, S., Patel, D.K. The Impingement Heat Transfer Data of Inclined Jet in Cooling Applications: A Review. J. Therm. Sci. 29, 1–12 (2020). https://doi.org/10.1007/s11630-019-1200-y
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DOI: https://doi.org/10.1007/s11630-019-1200-y