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http://dx.doi.org/10.7316/KHNES.2014.25.4.449

The Study of Heat Transfer on a Isothermal Circular Surface by an Impinging, Circular Water Jets with the Low Velocity Against the Direction of Gravity  

Eom, Yongkyoon (Department of Mechanical Engineering, Andong National Univ.)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.25, no.4, 2014 , pp. 449-458 More about this Journal
Abstract
The heat transfer phenomenon was investigated in this study when a single round water jet with the low velocity and against the direction of gravity flows to the downward facing Isothermal of definite thickness circular plate. Experimental investigation is performed for a single round jet diameter 4mm, 6mm, and 8mm with the jet velocity 2.4m/s and jet fluid temperature of $24^{\circ}C$, varied the ratio of nozzle clearance/nozzle diameter (H/D)1, 2, 3, 6, and 8, on circular plate isothermal condition with $85^{\circ}C$. The local convection heat transfer coefficient distributions are analyzed based on the visualization of jet flow field. The effects of the diameter of Nozzle, the ratio of H/D and the ratio of nozzle diameter/circular plate diameter on heat transfer phenomenon are investigated. As a results of experiment is obtained correlation equation, $Nu_r=3.18Re_r^{0.55}Pr_r^{0.4}$.
Keywords
Impinging Jet Heat Transfer; Circular Water Jet; Downward Facing Isothermal Circular Plate; Against Direction Gravity; Upward Jet Flow; Definite Thickness Circular Plate;
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Times Cited By KSCI : 1  (Citation Analysis)
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