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EXPERIMENTAL INVESTIGATION OF SINGLE CIRCULAR IMPINGEMENT HEAT TRANSFER BY NITROGEN-HYDROGEN MIXTURE

Zhou Shao-ping

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Abstract

An experimental investigation on single circular impingement heat transfer by nitrogen-hydrogen mixture is presented.The study aims to determine the effect on stagnation heat transfer coefficient of the nozzle-to-plate spacing normalized by nozzle diameter,H/dj,jet Reynolds,Re,based on arrival velocity from 5000 to 60000,and Prandtl number in the range of 0.4Pr0.71.It is found that the stagnation Nusselt number is independent of nozzle-to-plate spacing up to 6.4 nozzle diameters.All experimental data have been correlated within 5% as functions of Reynolds number and Prandtl number.The experiment findings are compared with Gardon's correlation and derivations are observed at high Reynolds number.

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What this paper is about

An experimental investigation on single circular impingement heat transfer by nitrogen-hydrogen mixture is presented.The study aims to determine the effect on stagnation heat transfer coefficient of the nozzle-to-plate spacing normalized by nozzle diameter,H/dj,jet Reynolds,Re,based on arrival velocity from 5000 to 60000,and Prandtl number in the range of 0.4Pr0.71.It is found that the stagnation Nusselt number is independent of nozzle-to-plate spacing up to 6.4 nozzle diameters.All experimental data have been correlated within 5% as functions of Reynolds number and Prandtl number.The experiment findings are compared with Gardon's correlation and derivations are observed at high Reynolds number.

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Available abstract

An experimental investigation on single circular impingement heat transfer by nitrogen-hydrogen mixture is presented.The study aims to determine the effect on stagnation heat transfer coefficient of the nozzle-to-plate spacing normalized by nozzle diameter,H/dj,jet Reynolds,Re,based on arrival velocity from 5000 to 60000,and Prandtl number in the range of 0.4Pr0.71.It is found that the stagnation Nusselt number is independent of nozzle-to-plate spacing up to 6.4 nozzle diameters.All experimental data have been correlated within 5% as functions of Reynolds number and Prandtl number.The experiment findings are compared with Gardon's correlation and derivations are observed at high Reynolds number.

Key concepts: Reynolds number, Nusselt number, Prandtl number, Nozzle, Jet (fluid), Mechanics, Heat transfer coefficient, Heat transfer

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EXPERIMENTAL INVESTIGATION OF SINGLE CIRCULAR IMPINGEMENT HEAT TRANSFER BY NITROGEN-HYDROGEN MIXTURE — Research Paper | ScholarLens