- Author
- Kashiwagi, K.
- Title
- Study of Flame Spread Over a Porous Material Under External Radiation Fluxes.
- Coporate
- National Bureau of Standards, Washington, DC
- Book or Conf
- Combustion Institute, Symposium (International) on Combustion, 15th, August 25-31, 1974, Tokyo, Japan, 255-265 p., 1974
- Keywords
- flame spread | porous material | carpets | radiant flux profile
- Identifiers
- radiative heat feedback; convective heat feedback
- Abstract
- Characteristics of horizontal flame spread over the surface of a porous material, a carpet in this study, are studied experimentally and theoretically under various external radiant fluxes. It is observed that the size of flame is increased significantly by increasing the external radiant flux. This increases the radiative heat feedback from the flame so that it becomes comparable to or greater than the convective heat feedback. The external radiation can also cause an unstable motion of the flame front. This effect is probably due to the production of volatile pyrolysis products ahead of the flame front instead of under it. The theoretical calculation indicates that the thermal emission loss from the heated sample is significant and the internal radiation in the porous material must be included in the model.