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A heat transfer analysis from a porous plate with transpiration cooling

ABSTRACT
Present study is focused on improving heat transfer from a porous plate by cooling of air with transpiration cooling. Effects of Reynolds number of the air channel flow and particle diameter on cooling effectiveness of porous plate and efficiency of system were investigated experimentally. It was observed that increasing Reynolds number of 15.2% causes a decrease of 6.9% on cooling efficiency of the system and a decrease of 8.6% on cooling effectiveness of porous plate. Decreasing particle diameter causes a significant decrease on surface temperature and an increase on cooling effectiveness of porous plate. Difference of cooling effectiveness of porous plate from Dp=40 μm to Dp=200 μm is 12%. Verification of this study was also shown by comparing experimental results of this study with literature.
KEYWORDS
PAPER SUBMITTED: 2018-03-26
PAPER REVISED: 2018-04-19
PAPER ACCEPTED: 2018-04-20
PUBLISHED ONLINE: 2018-04-28
DOI REFERENCE: https://doi.org/10.2298/TSCI180326135K
REFERENCES
  1. Jiang, P.X., et al., Experimental and numerical investigation of convection heat transfer in transpiration cooling, Applied Thermal Engineering, 24 (2004), pp.1271-1289.7
  2. Liu, Y.Q., et al., Transpiration cooling of a nose cone by various foreign gases, International Journal of Heat and Mass Transfer, 53 (2010), pp.5364-5372.
  3. Liu, Y.Q., et al., Experimental and numerical investigation of transpiration for sintered porous flat plates, Applied Thermal Engineering, 50 (2013), pp.997-1007.
  4. Arai, M., Suidzu, T., Porous ceramic coating for transpiration cooling of gas turbine blade, Journal of Thermal Spray Technology, 22 (2012), pp.690-698.
  5. Wang, j., et al., An experimental investigation on transpiration cooling of wedge shaped nose cone with liquid coolant, International Journal of Heat and Mass Transfer, 75 (2014), pp.442-449.
  6. Langener, T., et al., Experimental investigations cooling applied to C/C material, International journal of Thermal Science, 54 (2012, pp.70-81.
  7. He, S., et al., Experimental study of film media used for evaporative pre-cooling air, Energy Conversion and Management, 87 (2014), pp.874-884.
  8. Polezhaev, J., The transpiration cooling for blades of high temperatures gas turbine, Energy Conversation and Management, 38 (1997), pp.1123-1133.
  9. Trevino C., Medina A., Analysis of transpiration cooling of a thin porous plate in a hot laminar convective flow, European Journal of Mechanic, 2 (1997), pp.245-260.
  10. Andoh, Y.H., Lips, B., Prediction of porous walls thermal protection by effusion or transpiration cooling. An analytic approach, Applied Thermal Engineering, 23 (2003), pp. 1947-1958.
  11. Liu, Y.Q., et al., Effects of local geometry and boundary conditions on transpirational cooling, International Journal of Heat and Mass Transfer, 62 (2013), pp.362-372.
  12. He, F., Wang, J., Numerical investigation on critical heat flux and coolant volume required for transpiration cooling with phase change, Energy Conversion and Management, 80 (2014), pp.591-597.
  13. Huang, Z., et al., Investigation of transpiration cooling for sintered metal porous struts in supersonic flow, Applied Thermal Engineering, 70 (2014), pp.240-249.
  14. Shi, J., Wang, J. Optimized structure of two layer porous media with genetic algorithm for transpiration cooling, International journal of Thermal Science, 47 (2008), pp.1595-1601.
  15. Song, C.H., et al., Cooling enhancement in an air cooled finned heat exchanger by thin water film evaporation, International Journal of Heat and Mass Transfer, 46 (2002),pp. 241-1249.
  16. Hsyan, S.M., et al., A study of the liquid evaporation with Darcian resistance effect on mixed convection in porous media, International Communications in heat and mass transfer, 32 (2005), pp.685-694.
  17. Maity, S., Thermocapillary flow of thin liquid film over a porous stretching sheet in presence of suction/injection, International Journal of Heat and Mass Transfer, 70 (2014), pp.819-826.
  18. Moffat, RJ, Describing the uncertainties in experimental results. Experimental Fluid Science 1 (1998), pp.3-17.
  19. Moffat, RJ, Using uncertainty analysis in the planning of an experiment. ASME Journal of Fluid Engineering,.107 (1985), pp.173-178.
  20. Caggese, O, et al., Experimental and numerical investigation of a fully confined impingement round jet. International Journal of Heat and Mass Transfer, 21 (2000), pp.156-163.
  21. Fechter, S, et al., Experimental and numerical investigation of narrow impingement cooling channels. International Journal of Heat and Mass Transfer, 67 (2013), pp.1208-1219.
  22. Kilic, M., Ali, H.M., 2018, Numerical investigation of combined effect of nanofluids and multiple impinging jets on heat transfer, Thermal Science, doi.org/10.2298/TSCI171204094K.