Results 251 to 260 of about 6,086,816 (288)

Prediction of the steady flame spread rate by the principle of minimal entropy production

Combustion Theory and Modelling, 1999
The propagation of a two-dimensional diffusive flame over a combustible material is studied by solving steady-state conservation equations written in the coordinate system fixed on the flame front. The analysis of a two-dimensional problem featuring flame spread rate as an eigenvalue has shown that there is no unique solution relative to the flame ...
A Karpov, A Galat, V Bulgakov
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Bounds for Downward Flame Spread Rate in Solid Fuels and Comparison to Experiments

Combustion Science and Technology, 2011
De Ris formulae for the flame spread rate over solid fuels that propagate against an external fluid flow for both the thermally thin and thick regimes have become well-known. In some cases, it is expected that predictions from these formulae will fail since they are independent of parameters that may modify the burning velocity.
Toni Pujol, Bruna Comas
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Effects of carbon nanotubes on flame spread rate over 1-propanol

Fire Safety Journal, 2005
Abstract This paper discusses the potential for thermally conductive nanoparticles to reduce flame spread velocities over fuel dispersion mixtures. Multi-walled carbon nanotubes (MWNTs) were dispersed in 1-propanol at levels above the mixture's percolation limit, 0.5, 1.0, 2.0, 4, 8, and 12 wt%, and tested in a rectangular fuel tray and a shallow pan
Mohamed I. Hassan, Eric Grulke, Keng Chuah, Kozo Saito   +3 more
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Estimation of the rate of spread and flame height of complex flame fronts by stereovision system

2010
This paper presents the computation of the rate of spread and flame height of complex flame fronts from the 3D points obtained by a stereovision ...
Rossi, Lucile, Molinier, Thierry, Akhloufi, Moulay, Tison, Yves   +3 more
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Flame spread and heat release rate model for a burning mattress

1996
A model has been developed to calculate the heat release rate of a mattress by a gas burner at the centre of the upper surface. The model describes flame spread of an ignition front radially outwards from a cylindrical flame at the centre. The heat release rate is calculated using the data obtained from cone calorimeter tests at an irradiance of 35 kW ...
Kokkala, Matti, Baroudi, Djebar
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A comparison of extinction limits and spreading rates in opposed and concurrent spreading flames over thin solids

Combustion and Flame, 2003
Flame-spread phenomena over thin solids are investigated for purely forced-opposing and concurrent flows. A two-dimensional, opposed-flow, flame-spread model, with flame radiation, has been formulated and solved numerically. In the first part of the paper, flammability limits and spread rates in opposed flow are presented, using oxygen percentage, free-
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Determination of the spread rate in opposed-flow flame spread over thick solid fuels in the thermal regime

Symposium (International) on Combustion, 1996
Limitations of the assumptions in the classic de Ris formula [1] for opposed-flow flame spread rate over thick fuels in the thermal regime are explored through numerical experiments in which the assumptions used in the original theory are eliminated one by one from the mathematical model.
Subrata Bhattacharjee, Jeff West, Robert A. Altenkirch   +2 more
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Opposed-flow flame spread in a circular duct of a solid fuel: Influence of channel height on spread rate

Proceedings of the Combustion Institute, 2002
The influence of channel height on flame spread in a circular duct of the solid fuel in an opposed-flow configuration was examined. Polymethylmethacrylate cylinders with a circular duct (diameter of 1, 2, or 3 mm) were used as fuel specimens, and both flame-spreading and stabilized combustion were observed.
Nozomu Hashimoto, Satoshi Watanabe, Harunori Nagata, Tsuyoshi Totani, Isao Kudo   +4 more
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An experimental facility for determination of steady flame spread rate of materials employing the Quasi‐stationary flame front technique

Fire and Materials, 1992
AbstractAn experimental facility based on the Quasi‐stationary Flame Front Technique for determination of steady flame spread rate of materials at discrete levels of external radiant heat flux was developed. The method employs an external radiant heat source in front of which an element of a specimen of the material is positioned at a location ...
Subodh Kumar Bhatnagar, B. S. Varshney, B. Mohanty   +2 more
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Using cone calorimeter data for the prediction of upward flame spread rate

Journal of Thermal Analysis and Calorimetry, 2012
In a cone calorimeter, the specimen receives uniformly distributed irradiance from the cone heater. Producing a heating environment simulating the heating intensity in real fires, this apparatus consequently is capable of providing information of materials relevant to their fire performance. Several previous upward flame spread models utilized the data
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