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Dynamics of combustion fronts in por...

Akkutlu, Ibrahim Yucel.

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Dynamics of combustion fronts in porous media.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Dynamics of combustion fronts in porous media./
Author:	Akkutlu, Ibrahim Yucel.
Description:	161 p.
Notes:	Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 6075.
Contained By:	Dissertation Abstracts International63-12B.
Subject:	Engineering, Chemical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3073737
ISBN:	0493938206

Dynamics of combustion fronts in porous media.
Akkutlu, Ibrahim Yucel.

Dynamics of combustion fronts in porous media. - 161 p.

Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 6075.

Thesis (Ph.D.)--University of Southern California, 2002.

Sustained propagation of combustion fronts in porous media is necessary for an in-situ combustion project. This study carries out a multi-faceted investigation on forward combustion front propagation in the presence of external heat losses.

ISBN: 0493938206Subjects--Topical Terms:

1018531
Engineering, Chemical.

Dynamics of combustion fronts in porous media.
LDR:03023nmm 2200325 4500 001 1849438
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020 $a 0493938206
035 $a (UnM)AAI3073737
035 $a AAI3073737
040 $a UnM $c UnM
100 1 $a Akkutlu, Ibrahim Yucel. $3 1937396
245 1 0 $a Dynamics of combustion fronts in porous media.
300 $a 161 p.
500 $a Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 6075.
500 $a Adviser: Yanis C. Yortsos.
502 $a Thesis (Ph.D.)--University of Southern California, 2002.
520 $a Sustained propagation of combustion fronts in porous media is necessary for an in-situ combustion project. This study carries out a multi-faceted investigation on forward combustion front propagation in the presence of external heat losses.
520 $a An analytical method is described treating the reaction region as discontinuity. Analysis of the reaction and combustion regions is accomplished using method of matched asymptotic expansions of large combustion activation energy. Results are used to investigate uniformly propagating fronts in homogeneous media; in presence of a preceding low-temperature oxidation front; and in heterogeneous porous media. In contrast to unique adiabatic solution, multiplicity is found in the presence of heat losses. These solutions consist of stable low-temperature branch in the vicinity of initial temperature, stable high temperature branch corresponding to a proper combustion front, and unstable intermediate branch connected to the others, Ignition and extinction appear as turning points.
520 $a In presence of low-temperature oxidation front, the fronts travel separately only in a range of injection rate. Separation distance becomes zero outside this range. Within the range, a maximum attainable distance exists between the fronts. Heat losses influence the distance. Nevertheless, the fronts minimize the heat loss effects by traveling closer, supporting each other.
520 $a In layered systems, thermal coupling leads to coherent traveling fronts, propagating at the same velocity. The coupling retards greatly the fronts in more permeable layers and accelerates only slightly those in less permeable ones, until a common front velocity is attained. The layer with the smallest injection velocity controls the propagation speed. Multiple steady-state solutions exist, leading to ignition and extinction.
520 $a Effective macroscopic equations incorporating influence of permeability heterogeneity are developed using small perturbation theory. Upscaled expressions are obtained for reaction rate coefficient, effective velocity and macrodispersivity using spectral theory.
590 $a School code: 0208.
650 4 $a Engineering, Chemical. $3 1018531
650 4 $a Engineering, Petroleum. $3 1018448
690 $a 0542
690 $a 0765
710 2 0 $a University of Southern California. $3 700129
773 0 $t Dissertation Abstracts International $g 63-12B.
790 1 0 $a Yortsos, Yanis C., $e advisor
790 $a 0208
791 $a Ph.D.
792 $a 2002
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3073737