Results 201 to 210 of about 19,086 (254)

The effect of pressure pulsation on diffusion combustion

27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2021
The paper presents the results of a study of diffusion combustion of gasoline in the presence of external pressure pulsations with small amplitude. It is found that external pressure pulsations lead to characteristic changes in the temperature field, which are expressed by an increase in the amplitude of the temperature pulsation for certain modes of ...
Agafontsev, Mikhail V., Loboda, Egor L., Klimentiev, A. S., Reyno, Vladimir V.   +3 more
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Diffusive catalytic combustion

Symposium (International) on Combustion, 1977
Catalytic combustion at temperatures down to about 580K is used in commercial heating applications. In this paper the role of the catalyst in diffusive catalytic combustion is discussed for methane and propane as fuels with platinum catalysts. Problems of modelling are discussed for the diffusive-convective flow between catalyst particles and for the ...
M.R. Dongworth, A. Melvin
openaire   +1 more source

Reaction–diffusion pulses: a combustion model

Journal of Physics A: Mathematical and General, 2004
Summary: We focus on a reaction-diffusion approach proposed recently for experiments on combustion processes, where the heat released by combustion follows first-order reaction kinetics. This case allows us to perform an exhaustive analytical study. Specifically, we obtain exact expressions for the speed of thermal pulses, their maximum temperature and
Campos, Daniel, Llebot, Josep Enric, Fort, Joaquim   +2 more
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Ignition delay in diffusive supersonic combustion

3rd Propulsion Joint Specialist Conference, 1967
This paper deals with the study of the zone located near the injector exit of an idealized supersonic combustion burner using hydrogen as fuel. The ignition delay length is calculated considering a constant-pressure, free mixing layer, where fuel and oxidizer mix without appreciable concentration change or heat release resulting from chemical reactions,
I. DA-RIVA, J. L. URRUTIA
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Diffusion controlled combustion of polymers

Symposium (International) on Combustion, 1975
A theoretical and experimental study of polymer combustion in an opposed flow diffusion flame (OFDF) is presented. An algebraic formula is derived, expressing the burning rate as a function of the fluid mechanic and thermodynamic variables. A polymer sample feed system has been developed which continuously positions the burning polymer surface within ...
D.J. Holve, R.F. Sawyer
openaire   +1 more source

DIFFUSION-CONTROLLED SMOULDERING COMBUSTION WITH MATERIAL SHRINKAGE

The Quarterly Journal of Mechanics and Applied Mathematics, 1994
The propagation of a two-dimensional smouldering reaction front through a semi-infinite solid is considered. The effects of material shrinkage, resulting from the passage of the combustion wave through the solid, and of finite mass transfer of oxidizer through the collapsed surface of the burnt material, are investigated.
Herbert, D. M., Kerr, C. E., Adler, J.
openaire   +2 more sources

Modelling a counter-diffusive reactor for methane combustion

Computers & Chemical Engineering, 2012
Abstract The counter diffusive reactor containing a catalyst supported on a fibre pad is often used as a radiant heater. Fuel fed from the inlet of the pad is combusted by oxygen diffusing from the reactor exit. This paper describes the development of a two dimensional model of this heater with methane as the fuel.
N. Jodeiri, J. P. Mmbaga, L. Wu, S. E. Wanke, Robert E. Hayes   +4 more
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The numerical solution for reaction–diffusion combustion with fuel consumption

Applied Mathematics and Computation, 2005
A classical problem concerning the reaction between a gaseous oxidant and a solid porous fuel, including the effects of consumption of the solid fuel of a poisoning of a solid catalyst, is studied numerically in this paper. The initial boundary value problem is presented in Section 2, while the numerical solution with the corresponding results---mostly
M. R. Abd El-Salam, M. H. Shehata
openaire   +1 more source