Abstract
The flame behaviour of a ceramic foam surface burner in the radiation mode has been studied. Two models are presented. The first numerical model is based on the skeletal mechanism for lean methane-air combustion consisting of 25 reactions among 16 species. Surface radiation of the burner is included. The second simple analytical model is based on the known behaviour of 1D flames on an externally cooled perfectly conducting burner. The radiative heat loss of the burner is balanced with the energy loss of the flame to the burner. Both models predict the same non-adiabatic flame temperature within a few degrees. There is a slight difference between the predicted surface temperatures, which is caused by errors in the average value for the heat capacity in the second model. Results of the surface and gas temperature measurements show the same trends as the numerical computations, although the absolute values show some discrepancies. The discrepancies of the surface temperature are caused by uncertainties of the effective emissivity of the surface, and the discrepancies of the gas temperature are caused by the rather large corrections of the thermocouple temperature.
| Original language | English |
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| Pages (from-to) | 127-140 |
| Number of pages | 14 |
| Journal | Heat and Technology |
| Volume | 13 |
| Issue number | 2 |
| Publication status | Published - 1 Dec 1995 |