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Numerical modeling of microgravity s...

Kallman, Elizabeth Marie.

Numerical modeling of microgravity smoldering combustion in flexible polyurethane foam.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Numerical modeling of microgravity smoldering combustion in flexible polyurethane foam.
作者:	Kallman, Elizabeth Marie.
面頁冊數:	261 p.
附註:	Chair: A. Carlos Fernandez-Pello.
附註:	Source: Dissertation Abstracts International, Volume: 66-10, Section: B, page: 5643.
Contained By:	Dissertation Abstracts International66-10B.
標題:	Engineering, Mechanical.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3190832
ISBN:	9780542343131

Numerical modeling of microgravity smoldering combustion in flexible polyurethane foam.
Kallman, Elizabeth Marie.

Numerical modeling of microgravity smoldering combustion in flexible polyurethane foam. - 261 p.

Chair: A. Carlos Fernandez-Pello.

Thesis (Ph.D.)--University of California, Berkeley, 2005.

In both opposed and forward smolder, increasing bulk heat losses result in a decrease of the smolder velocity. If the bulk heat losses are sufficiently large, extinction occurs. When energetic homogeneous reactions at the char/degraded foam interface in forward smolder are incorporated via a global, single-step homogeneous reaction, large bulk heat losses can be an effective way to prevent the onset of thermal runaway.

ISBN: 9780542343131Subjects--Topical Terms:

212470
Engineering, Mechanical.

Numerical modeling of microgravity smoldering combustion in flexible polyurethane foam.
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245 1 0 $a Numerical modeling of microgravity smoldering combustion in flexible polyurethane foam.
300 $a 261 p.
500 $a Chair: A. Carlos Fernandez-Pello.
500 $a Source: Dissertation Abstracts International, Volume: 66-10, Section: B, page: 5643.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2005.
520 # $a In both opposed and forward smolder, increasing bulk heat losses result in a decrease of the smolder velocity. If the bulk heat losses are sufficiently large, extinction occurs. When energetic homogeneous reactions at the char/degraded foam interface in forward smolder are incorporated via a global, single-step homogeneous reaction, large bulk heat losses can be an effective way to prevent the onset of thermal runaway.
520 # $a Opposed smolder is modeled using a two-step exothermic kinetic scheme: oxidative pyrolysis followed by exothermic oxidation. In accordance with experimental evidence, forward smolder is modeled using a two-step kinetic scheme: endothermic pyrolysis, followed by an exothermic oxidative reaction that provides the heat to drive the pyrolysis front. In the absence of bulk heat losses, opposed and forward smolder velocities are found to increase with increasing inlet oxidizer mass flux.
520 # $a Our results demonstrate the efficacy of applying bulk heat losses to promote microgravity smolder inhibition and extinction. The use of bulk heat losses to suppress microgravity smolder is a viable alternative to traditional means of extinguishment.
520 # $a Self-sustaining smolder propagation is a balance between the heat generated by and the heat lost from the smolder reaction. In this work we investigate the effect of bulk heat losses on one-dimensional, unsteady, microgravity, forced low-flow, opposed and forward smolder in flexible, open-cell, polyurethane foam. We also examine how the addition of homogeneous reactions affect one-dimensional forward smolder. These investigations are achieved through the development of three respective numerical models, and the coding of a solver.
590 $a School code: 0028.
650 # 0 $a Engineering, Mechanical. $3 212470
650 # 0 $a Engineering, Chemical. $3 226989
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790 1 0 $a Fernandez-Pello, A. Carlos, $e advisor
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