Flame spreading over liquid ethanol |
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Authors: | E. Degroote P.L. Garcia-Ybarra |
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Affiliation: | (1) EUITA, Dept. Ciencia y Tecnologia Aplicadas (Matematicas), Universidad Politecnica De Madrid, C/ CiudadUniversitaria, s/n 28040 Madrid, Spain, ES;(2) CIEMAT, Dept. Combustibles Fósiles, Av. Complutense 22, 28040 Madrid, Spain, ES |
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Abstract: | Flame spreading over liquid ethanol has been experimentally characterized for ethanol for subflash temperatures, in two different channels. Three different spreading regimes have been observed. A uniform region (with flame velocities close to 10 cm/s) appears for values of the initial surface liquid temperature above a critical value . For values an oscillatory regime occurs. For very low temperatures, , a new uniform regime appears with slow propagation velocities (close to 1 cm/s). The critical point has been described as a Hopf bifurcation, while resembles a homoclinic connection. Received 16 October 1998 and Received in final form 23 June 1999 |
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Keywords: | PACS. 47.20.Ky Nonlinearity (including bifurcation theory) – 47.27.-i Turbulent flows, convection, and heat transfer |
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