Combined convective and radiative heat transfer on transpiration cooling system in Al-Co open-celled foam having PPI of 20

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Published: Apr 12, 2017
Keywords:
Open-cell foam Radiation Transpiration cooling Reynolds number

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Pipatana Amatachaya
Development In Technology Of Porous Materials Research Laboratory (DITO-Lab), Department of Mechanical Engineering, Faculty of Engineering and Architecture,Thailand
Bundit Krittacom
Development In Technology Of Porous Materials Research Laboratory (DITO-Lab), Department of Mechanical Engineering, Faculty of Engineering and Architecture,Thailand
Rapeepong Peamsuwan
Department of Applied Physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan (RMUTI), 744 Suranarai Road, Maung, Nakhonratchasima, Thailand

Abstract

       One-dimensional transpiration cooling system in open-celled foam has been conducted experimentally and numerically to investigate the heat transfer characteristics of combined convection and radiation. The Alumina–Cordierite (Al-Co) open-cell foam having porosity of 0.875 and pores per inch (PPI) of 20 was employed. The upper surface of porous plate was heated by the heat flux of incoming radiation (qRx,f) varying from 0.97 - 16.59 kW/m2 whereas air injection velocity (uf) fed into the lower surface was varied from              0.364 - 1.274 m/s, and was then rearranged as Reynolds number (Re). For the report of the results in the present study, two efficiencies including of temperature (hT) and conversion efficiency (hC) were presented. The hT increased rapidly with the air injection velocity (Re). It was then saturated and had a constant value at Re higher than 15. For the result of hC, it was decreased slightly with increasing of qRx,f and uf (Re). The numerical predictions also agreed with experimental data very well. 

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How to Cite
Amatachaya, P., Krittacom, B., & Peamsuwan, R. (2017). Combined convective and radiative heat transfer on transpiration cooling system in Al-Co open-celled foam having PPI of 20. Asia-Pacific Journal of Science and Technology, 18(2), 191–199. Retrieved from https://so01.tci-thaijo.org/index.php/APST/article/view/82837
Issue
Vol. 18 No. 2 (2013): April
Section
Research Articles

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