- Author
- Beyler, C. L.
- Title
- Diffusion Flame Energy Transfers.
- Coporate
- Harvard University, Cambridge, MA
- Sponsor
- National Bureau of Standards, Gaithersburg, MD
- Report
- Home Fire Proj. Tech. Rpt. 69, January 1985, 14 p.
- Contract
- NSF-CPE-8012985
- Keywords
- diffusion flames | combustion products | plumes | entrainment | soot
- Abstract
- This work was done and is presented in two parts. At Harvard the interaction of a diffusion flame with a visciated hot layer was investigated. The entrainment was found to depend upon the frequency of flame oscillations and the eddy size. These later depend upon the burner lip and other geometric factors. It appears to be a weak function of the fuel. The composition of the layer and its burnout are more strongly dependent on the fuel and some progress has been made toward burnout prediction. The FMRC study on diffusion flame radiation has demonstrated that a fuel's soot-point height is controlled by the radiative heat loss from the flame. Flame temperature and soot concentration measurements verser height are correlated in terms of the fuel's tabulted soot-point heights. The results have suggested a conceptual framework for precisely inferring and correlating the radiation and pollutant emission from diffusion flames. Confirmation of the hypothesis has been achieved for large-scale pool fires and buoyant turbulent fuel-jet flames. The sutdy has lead to apatent application for inferring large-scale radiation hazards. Two detailed theoretical models were formulated and are being tested.