Results 241 to 250 of about 6,086,816 (288)

Effect of Environmental Variables on Flame Spread Rates in Microgravity

45th AIAA Aerospace Sciences Meeting and Exhibit, 2007
This paper reports 2D CFD-based computer modeling of opposed flow flame spread over thick samples of polymethylmethacrylate (PMMA). Model predictions are compared with experimental data from normal-gravity experiments at multiple forced flow velocities and KC-135 parabolic flight microgravity experiments.
Chris Lautenberger, Sara McAllister, David Rich, Carlos Fernandez-Pello   +3 more
openaire   +1 more source

Burn Angle and Its Implications on Flame Spread Rate, Mass Burning Rate, and Fuel Temperature for Downward Flame Spread over Thin PMMA

Combustion Science and Technology, 2019
A burn angle is defined as the acute angle subtended by the pyrolyzing surface with the virgin fuel surface and is an easily measurable overall characteristic parameter of flame spread, just like f...
L. Carmignani, S. Bhattacharjee
openaire   +1 more source

Flame Spread Over Combustible Surfaces for Laminar Flow Systems Part II: Flame Heights and Fire Spread Rates

Combustion Science and Technology, 1979
Abstract In the previous paper (Part I), results were given for unburnt fuel fraction and wall heat flux for boundary layer flows with combustion. In the present paper, a highly simplified model of the combusting plume region and the previous unburnt fuel results are used to obtain analytical results for the ratio of flame to gasification heights in ...
K. ANNAMALAI, M. SIBULKIN
openaire   +1 more source

Flame Spread Rates Over Methanol Fuel Spills

Combustion Science and Technology, 1985
Abstract Flame spread rates over pooled methanol and pooled gasoline were compared with flame spread rates over a porous surface saturated with these fuels. If the surface temperature was above the fuel flashpoint, the flame spread rate over a fuel-soaked porous surface was the same as for pooled fuel. Just below the flashpoint, flame spread was slower
openaire   +1 more source

Correlating Downward Flame Spread Rates for Thick Fuel Beds

Combustion Science and Technology, 1983
Flame spread rates are presented for polymethylmethacrylate fuel beds 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, required to sustain the flame, compared to the maximum possible ...
R. A. ALTENKIRCH, R. EICHHORN, A. R. RIZVI   +2 more
openaire   +1 more source

Steiner tunnel index as a measure of flame spread rate

Fire Technology, 1978
The procedure by which a flame spread index is calculated in the Steiner Tunnel Test has recently been revised by ASTM. The new index is shown to measure average flame speed, weighted so as to emphasize the flame behavior in the earlier part of the test.
openaire   +1 more source

Geometrical Effects on Flame Spread Rate for Wildland Fine Fuels

Combustion Science and Technology, 1993
Abstract It has long been common practice for firefighters to test wildfire potential by lighting single strands or leaves (sheltered from the wind) and observing the rate of spread. This paper discusses single-element fire spread and its potential as a method for determining fine- fuel moisture content and for estimating the likely rate of spread ...
P.R.A. LYONS, R.O. WEBER
openaire   +1 more source

Investigation of the structure and spread rate of flames over PMMA slabs

Applied Thermal Engineering, 2018
Abstract Experimental and numerical investigations of upward and downward flame spread over flat polymethyl methacrylate (PMMA) slabs are presented here. Experiments have been carried out using PMMA slabs of different thickness in the range of 1.6 mm–5.4 mm.
H.R. Rakesh Ranga, O.P. Korobeinichev, A. Harish, Vasudevan Raghavan, A. Kumar, I.E. Gerasimov, M.B. Gonchikzhapov, A.G. Tereshchenko, S.A. Trubachev, A.G. Shmakov   +9 more
openaire   +1 more source

Influence of Fuel-Air Ratio on Horizontal Flame Spread Rates

Heat Transfer: Volume 2, 1997
Abstract Flame spread along horizontal surfaces in the presence of a forced convective airflow depends primarily upon the transfer of radiant energy to downstream surfaces from a flame front that is tilted in the direction of flow. The soot in the flame serves as the primary source of radiation but the soot that emerges from the flame ...
Charles D. Litton, Charles C. Hwang
openaire   +1 more source

Estimation of heat release rate based on analysis of flame spread behavior in mattresses

Fire and Materials, 2023
AbstractTo investigate the fire danger of mattresses, combustion experiments were conducted with a mattress installed at different heights above the floor to better understand their combustion behavior. The installation height was varied because the height of a mattress varies depending on the bed frame, and the combustion behavior is expected to ...
Kye‐Won Park, Masayuki Mizuno, Chang‐Geun Cho, Jong‐Jin Jeong   +3 more
openaire   +1 more source