https://doi.org/10.1007/s100510050045
Flame spreading over liquid ethanol
1
EUITA, Dept. Ciencia y Tecnologia Aplicadas (Matematicas),
Universidad Politecnica De Madrid, C/ Ciudad
Universitaria, s/n 28040 Madrid, Spain
2
CIEMAT, Dept. Combustibles Fósiles, Av. Complutense 22, 28040 Madrid, Spain
Received:
16
October
1998
Revised:
23
June
1999
Published online: 15 January 2000
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 T∞ above a critical value Tc. For values Th<T∞<Tc an oscillatory regime occurs. For very low temperatures, T∞<Th , a new uniform regime appears with slow propagation velocities (close to 1 cm/s). The critical point Tc has been described as a Hopf bifurcation, while Th resembles a homoclinic connection.
PACS: 47.20.Ky – Nonlinearity (including bifurcation theory) / 47.27.-i – Turbulent flows, convection, and heat transfer
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000