Computational predictions of flame spread over alcohol poolsThe effects of buoyancy and thermocapillarity on pulsating and uniform flame spread above n-propanol fuel pools have been studied using a numerical model. Data obtained indicate that the existence of pulsating flame spread is dependent upon the formation of a gas-phase recirculation cell which entrains evaporating fuel vapor in front of the leading edge of the flame. The size of the recirculation cell which is affected by the extent of liquid motion ahead of the flame, is shown to dictate whether flame spread is uniform or pulsating. The amplitude and period of the flame pulsations are found to be proportional to the maximum extent of the flow head. Under conditions considered, liquid motion was not affected appreciably by buoyancy. Horizontal convection in the liquid is the dominant mechanism for transporting heat ahead of the flame for both the pulsating and uniform regimes.
Document ID
19930040898
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Schiller, D. N. (NASA Lewis Research Center Cleveland, OH, United States)
Ross, H. D. (NASA Lewis Research Center Cleveland, OH, United States)
Sirignano, W. A. (California Univ. Irvine, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
AIAA PAPER 93-0825
Meeting Information
Meeting: AIAA, Aerospace Sciences Meeting and Exhibit