- Author
- Altenkirch, R. A. | Padgaonkar, A. M. | Eichhorn, R.
- Title
- Buoyancy Effects on Flames Spreading Over Thick, Horizontal Fuel Beds.
- Coporate
- Kentucky Univ., Lexington
- Report
- WSS/CI 83-06
- Book or Conf
- Combustion Institute/Western States Section. Spring Meeting, 1983. April 11-12, 1983, Pasadena, Ca, 1983
- Keywords
- fuel beds | oxygen concentration
- Abstract
- Flame spread rates for horizontal spread over the topside of polymethylmethacrylate fuel beds are presented as a function of gravitational acceleration and ambient pressure and oxygen concentration. The data are correlated by plotting a dimensionless spread rate that is a measure of the heat transferred forward of the flame, including the effects of radiation, gainst a Damkohler number, which indicates the approach of the flame to its maximum temperature. The dependence of the radiation contribution to the forward heat transfer on the experimental parameters is determined by forcing the horizontal flame spread correlation to fit a downward flame spread correlation in which the dimensionless spread rate represents the same physical quantity as does the dimensionless spread rate employed for horizontal spread even though it does not contain the effects of radiation. Results show that the forwrd heat transfer by radiation is proportional to a Grashof number to a power that is slightly larger than one-half.