Prediction of porous walls thermal protection by effusion or transpiration cooling. An analytical approach

• Published in: Applied thermal engineering Vol. 23; no. 15; pp. 1947 - 1958
• Main Authors: Andoh, Y.H., Lips, B.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.10.2003; Elsevier
• Subjects: Applied sciences; Compressible or incompressible fluid; Effusion cooling; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Heat and mass transfer; Heat transfer; Modeling; Porous media; Theoretical studies. Data and constants. Metering; Transpiration cooling; Porous media; Effusion cooling; Heat and mass transfer; Modeling; Transpiration cooling; Compressible or incompressible fluid; Compressible fluid; Transpiration; Cooling; Effusion; Porous medium; Incompressible fluid; Heat transfer; Mass transfer
• ISSN: 1359-4311
• DOI: 10.1016/S1359-4311(03)00145-5

The study is about the thermal control of porous walls submitted to severe heat fluxes. The numerical approach model of heat transfer, developed, is based on energy balance equation. The governing parameters are the volumetric heat transfer coefficient, the equivalent thermal conductivity of the material and fluid flow characteristics. The interactive effects of these parameters on heat transfer are presented to permit to understand the relative importance of varied phenomena occurring. The validity of the results is verified in a thermal behavior study of a porous plate submitted to a heat flux up to 3500 K and cooled by a refrigerant fluid. Good agreement with the previsions is obtained.