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Computational modeling of wood combu...

Bryden, Kenneth Mark.

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Computational modeling of wood combustion.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Computational modeling of wood combustion./
作者:	Bryden, Kenneth Mark.
面頁冊數:	229 p.
附註:	Source: Dissertation Abstracts International, Volume: 59-04, Section: B, page: 1805.
Contained By:	Dissertation Abstracts International59-04B.
標題:	Engineering, Mechanical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9813109
ISBN:	9780591825862

Computational modeling of wood combustion.
Bryden, Kenneth Mark.

Computational modeling of wood combustion. - 229 p.

Source: Dissertation Abstracts International, Volume: 59-04, Section: B, page: 1805.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 1998.

A detailed computational model of wood combustion for a wood slab of varying thickness has been developed and compared with experimental results. The main features of this model are (1) full coupling between the drying region, pyrolysis region, char combustion, and the external gas phase; (2) shrinkage of the solid matrix due to drying and pyrolysis; and (3) drying and recondensation within the wood.

ISBN: 9780591825862Subjects--Topical Terms:

783786
Engineering, Mechanical.

Computational modeling of wood combustion.
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100 1 $a Bryden, Kenneth Mark. $3 1911965
245 1 0 $a Computational modeling of wood combustion.
300 $a 229 p.
500 $a Source: Dissertation Abstracts International, Volume: 59-04, Section: B, page: 1805.
500 $a Supervisor: Kenneth W. Ragland.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 1998.
520 $a A detailed computational model of wood combustion for a wood slab of varying thickness has been developed and compared with experimental results. The main features of this model are (1) full coupling between the drying region, pyrolysis region, char combustion, and the external gas phase; (2) shrinkage of the solid matrix due to drying and pyrolysis; and (3) drying and recondensation within the wood.
520 $a Drying, pyrolysis, and combustion within the solid matrix are modeled using the one-dimensional, time dependent differential conservation equations for energy, mass, momentum, and species. Wood pyrolysis kinetics, including tar decomposition, are modeled using three competing primary reactions and two secondary reactions. The external gas phase is modeled using differential conservation equations for mass, momentum, energy, and species for a steady state, reacting, compressible flow for a two-dimensional boundary layer flow. Seven gas phase species and three homogeneous reactions are included. The conservation equations for both domains are solved using second-order accurate finite differencing. A moving boundary incorporates both char shrinkage and surface recession due to char combustion and gasification. The model was validated using data available from an Ohio State University Calorimeter.
520 $a The model results indicated that the cases examined could be separated into three separate combustion regimes based on particle thickness and moisture--thermally thin, intermediate, and thermally thick regimes. In the thermally thin regime, temperature is nearly constant across the particle; consequently, drying and pyrolysis occur in series. In the intermediate regime, there are significant temperature gradients, but the reaction rate is slow relative to the heat transfer rate, and the reaction region extends throughout the particle; consequently, drying and pyrolysis occur in series. In the thermally thick regime, wet unreacted wood, the pyrolysis zone, and char exist simultaneously. This research provides limits based on temperature, moisture, and thickness for intermediate and thermally thick regimes under furnace conditions in the case of one-dimensional particles such as chips.
590 $a School code: 0262.
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Agriculture, Wood Technology. $3 1031154
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710 2 0 $a The University of Wisconsin - Madison. $3 626640
773 0 $t Dissertation Abstracts International $g 59-04B.
790 1 0 $a Ragland, Kenneth W., $e advisor
790 $a 0262
791 $a Ph.D.
792 $a 1998
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9813109