Abstract

Spectral or total normal emittances of isothermal open-cellular porous plates were evaluated theoretically by solving the equation of transfer and obtained results were compared with available experimental data. The extinction coefficient, the albedo and the asymmetry factor of a scattering phase function appearing in the equation of transfer as parameters were predicted by Kamiuto's radiative property model. A comparison between theoretical predictions and available spectral or total emittance data for three kinds of open-cellular porous plate reported in literature shows acceptable agreements within experimental uncertainty, and thus the present transfer-theoretical approach is effective in predicting the emission characteristics of open-cellular porous plates.

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