Some characteristics of a spin combustion site and of the processes occurring in it

1998 ◽  
Vol 34 (3) ◽  
pp. 288-291 ◽  
Author(s):  
A. K. Filonenko
Keyword(s):  
Spin Combustion ◽  
Combustion Site

Phenomenological theory of spin combustion

1981 ◽  
Vol 42 ◽  
pp. 1-6 ◽  
Author(s):  
A.P. Aldushin ◽  
B.A. Malomed ◽  
Ya.B. Zeldovich
Keyword(s):  
Phenomenological Theory ◽  
Spin Combustion

The effect of infiltration and reactant gas pressure on spin combustion in a gas-solid system

2000 ◽  
Vol 28 (1) ◽  
pp. 1421-1429 ◽  
Author(s):  
Igor Filimonov ◽  
Nickolai Kidin ◽  
Alexander Mukasyan
Keyword(s):  
Gas Pressure ◽  
Spin Combustion ◽  
Solid System

Excess Enthalpy Flames

2002 ◽  
Author(s):  
V. S. Babkin ◽  
I. Wierzba ◽  
G. A. Karim
Keyword(s):  
Excess Enthalpy ◽  
Heterogeneous Systems ◽  
Reaction Rates ◽  
Flammability Limits ◽  
Cellular Flames ◽  
Burning Rates ◽  
Spin Combustion ◽  
Combustion Processes ◽  
Unsteady Processes ◽  
Chemical Reaction Rates

Combustion processes with excess enthalpy are described with examples given. It is shown that different processes, such as heat and mass transfer, phase and chemical changes are involved. Moreover, flames with excess enthalpy can be encountered in a variety of forms such as laminar or turbulent, within homogeneous or heterogeneous systems involving stationary or unsteady processes, with pulse or spin combustion and as cellular flames. It is to be shown that mainly due to the increase in the chemical reaction rates within the combustion zone, the excess enthalpy state can lead to substantial increases in the burning rates, widening the associated flammability limits and modifying the preignition processes. Some applications that can benefit from the use of such flames are outlined.

Trends in the spin combustion of thermites

1982 ◽  
Vol 18 (2) ◽  
pp. 134-139 ◽  
Author(s):  
A. V. Dvoryankin ◽  
A. G. Strunina ◽  
A. G. Merzhanov
Keyword(s):  
Spin Combustion

Rotating waves of the phenomenological equation of spin combustion

2008 ◽  
Vol 78 (1) ◽  
pp. 612-616 ◽  
Author(s):  
A. M. Samoilenko ◽  
E. P. Belan
Keyword(s):  
Phenomenological Equation ◽  
Rotating Waves ◽  
Spin Combustion

Nonlinear analysis of condensed-phase surface combustion

1990 ◽  
Vol 1 (1) ◽  
pp. 73-89 ◽  
Author(s):  
Marc Garbey ◽  
Hans G. Kaper ◽  
Gary K. Leaf ◽  
Bernard J. Matkowsky
Keyword(s):  
Reaction Rate ◽  
Melting Process ◽  
Axial Direction ◽  
Combustion Products ◽  
Multiple Point ◽  
Stability Properties ◽  
One Step ◽  
Spin Combustion ◽  
Phase Surface ◽  
The Stability

This article is concerned with the structure and stability properties of a combustion front that propagates in the axial direction along the surface of a cylindrical solid fuel element. The fuel consists of a mixture of two finely ground metallic powders, which combine upon ignition in a one-step chemical reaction. The reaction is accompanied by a melting process, which in turn enhances the reaction rate. The combustion products are in the solid state. The reaction zone, inside which the melting occurs, is modelled as a front that propagates along the surface of the cylinder. The different modes of propagation that have been observed experimentally (such as single- and multiheaded spin combustion and multiple-point combustion) are explained as the results of bifurcations from a uniformly propagating plane circular front. The stability properties of the various modes are discussed.

scholarly journals One-Dimensional Simulation of the In-Situ Oil Combustion with Consideration to Fluid and Solid Combustible Components

2019 ◽  
Vol 62 (1) ◽  
pp. 47-60 ◽  
Author(s):  
I. A. Koznacheev ◽  
K. V. Dobrego
Keyword(s):  
Combustion Wave ◽  
Combustion Front ◽  
Exothermic Reaction ◽  
Heat Content ◽  
Maximum Temperature ◽  
Thermal Front ◽  
Liquid Component ◽  
One Dimensional ◽  
Combustion Site

The one-dimensional axisymmetric problem of initiation of a combustion wave in an oil-saturated reservoir is solved numerically. Two combustible components, viz. liquid (oil) and solid (kerogen, oil sorbate) were considered. The influence of the abovementioned components on time of the hot site ignition and combustion front speed was simulated and analyzed. It was demonstrated that growth of the mass fraction of liquid component (the total heat content being preserved) results in retard of formation of the hot site near the well and in reduction of the maximum temperature of the combustion wave, disregarding of the higher reactivity of liquid combustible. Simulation revealed existence of the two “peaks” of thermal front velocity. The first one corresponds by time to ignition of combustion site. The second one corresponds to a moment when the solid component combustion front overrides the oil displacement front. Calculations shown, that thermal wave propagation velocity, at least after passing the “peaks” and transition to quasi-steady regime, does not considerably depend on mass traction of the fluid component in the system. A typical term of the exothermic reaction site formation may increase from 50 to 200 days in case of growth of the liquid component content from 30 to 80 mass % at the considered thermal conditions in the oil reservoir. Thus, the implementation of the thermo-gas method in high-productive layers increases the likelihood of difficulty of initiation of a fire. Therefore, the study of the regularities of intra-combustion in such cases is of a particular interest. For instance, the task of combustion site ignition may be resolved by increase of oxygen content in blowing-gas or by means of non-steady (periodical) blowing. It is found that taking into consideration of highly reactive liquid component results in widening (diffusion) of the thermal front, which may play positive role in its spatial thermo-hydrodynamic stabilization. The results of simulation may be utilized for development of technical projects of oil recovery via in-situ combustion, for designing of furnaces utilizing multicomponent fixed layer fuels and for thermochemical investigation of multicomponent fuels.

Periodic modes of the phenomenological spin combustion equation

2015 ◽  
Vol 51 (2) ◽  
pp. 214-231
Author(s):  
A. M. Samoilenko ◽  
E. P. Belan
Keyword(s):  
Spin Combustion
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