The Critical Explosion Parameter in the Theory of Thermal Ignition

1977 ◽  
Vol 20 (4) ◽  
pp. 471-484 ◽  
Author(s):  
L. JU. FRADKIN ◽  
G. C. WAKE
Keyword(s):  
Thermal Ignition ◽  
Explosion Parameter

scholarly journals Thermal ignition of a combustible over an inclined hot plate

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Salaika Parvin ◽  
Nepal Chandra Roy ◽  
Rama Subba Reddy Gorla
Keyword(s):  
Mixed Convection ◽  
Convection Flow ◽  
Physical Parameters ◽  
Thermal Ignition ◽  
Mixed Convection Flow ◽  
Flow Properties ◽  
Continuous Transformation ◽  
Hot Plate ◽  
Ignition Characteristics ◽  
Good Agreement

AbstractIn this study, the ignition characteristics and the flow properties of the mixed convection flow are presented. Detailed formulations of the forced, natural and mixed convection problems have been discussed. In order to avoid inconvenient switch between the forced and natural convection we introduce a continuous transformation in the mixed convection. We make a comparison between these situations which reveal a good agreement. For mixed convection flow, the ignition distance is explicitly expressed as a function of the Prandtl number, reaction parameter and wall temperature. It has been observed that owing to the increase of the aforesaid parameters, the thermal ignition distance is reduced. Numerical results are illustrated for velocity, temperature, and concentration for different physical parameters. Furthermore, the development of combustion is presented by using streamlines, isotherms and isolines of fuel and oxidizer.

An Asymptotic, Thermo-Diffusive Ignition Theory of Porous Solid Fuels

1976 ◽  
Vol 98 (2) ◽  
pp. 269-275 ◽  
Author(s):  
Choong Se Kim ◽  
Paul M. Chung
Keyword(s):  
Nonlinear Partial Differential Equations ◽  
Porous Solid ◽  
Solid Fuels ◽  
Thermal Ignition ◽  
Mass Balances ◽  
Governing Equations ◽  
Order Ordinary Differential Equation ◽  
First Order ◽  
Time Space ◽  
Gaseous Oxidant

The governing equations of thermal ignition are analyzed for porous solid fuel, such as coal, of various two-dimensional and axisymmetric geometries by the Laplace asymptotic method. Mass diffusion of the gaseous oxidant through the porous fuel is included. The nonlinear partial differential equations of energy and mass balances in time-space coordinates containing the Arrhenius volumic chemical reaction terms are analyzed. By employing the Laplace asymptotic technique and by invoking a certain limit theorem, the governing equations are reduced to a first order ordinary differential equation governing the fuel surface temperature, which is readily solved numerically. Detailed discussion of the effects of the various governing parameters on ignition is presented. Because of the basically closed-form nature of the solutions obtained, many general and fundamental aspects of the ignition criteria hitherto unknown are found.

scholarly journals On the Thermal Ignition of Wood Waste

1998 ◽  
Vol 76 (3) ◽  
pp. 205-210 ◽  
Author(s):  
J.C. Jones ◽  
A. Puignou
Keyword(s):  
Wood Waste ◽  
Thermal Ignition

Theory of thermal ignition

1967 ◽  
Vol 16 (1) ◽  
pp. 23-25
Author(s):  
V. G. Abramov ◽  
V. T. Gontkovskaya ◽  
A. G. Merzhanov
Keyword(s):  
Thermal Ignition

The thermal ignition of lignocellulosics in infinite slab and cubic geometries

2007 ◽  
Vol 54 (4) ◽  
pp. 317-318 ◽  
Author(s):  
J. C. Jones ◽  
H. Rahmati ◽  
T. D. H. Do
Keyword(s):  
Thermal Ignition ◽  
Infinite Slab
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