This paper provides a comparison of wall heat fluxes and quenching distances as one-dimensional hydrogen and heptane flames impinge head-on onto a wall. It is shown that the quenching distances for stoichiometric H 2 /air and C 7 H 16 /air flames under the specified conditions of this study are about the same, but the wall heat flux for the H 2 /air flames is approximately a factor of two greater. For lean H 2 /air mixtures, the quenching distance increases substantially and the wall heat flux decreases. To understand more clearly the interplay of flame speed, temperature, thermal diffusivity, and surface kinetics on the results, studies of H 2 /O 2 flames are also carried out.
Wall Interactions of Hydrogen Flames Compared with Hydrocarbon Flames
MAGI, Vinicio;
2007-01-01
Abstract
This paper provides a comparison of wall heat fluxes and quenching distances as one-dimensional hydrogen and heptane flames impinge head-on onto a wall. It is shown that the quenching distances for stoichiometric H 2 /air and C 7 H 16 /air flames under the specified conditions of this study are about the same, but the wall heat flux for the H 2 /air flames is approximately a factor of two greater. For lean H 2 /air mixtures, the quenching distance increases substantially and the wall heat flux decreases. To understand more clearly the interplay of flame speed, temperature, thermal diffusivity, and surface kinetics on the results, studies of H 2 /O 2 flames are also carried out.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
