A numerical model for the determination of biomass ignition from a hotspot
| dc.contributor.author | McArdle, Patrick, author | |
| dc.contributor.author | Williams, John, advisor | |
| dc.contributor.author | Gao, Xinfeng, committee member | |
| dc.contributor.author | Shipman, Patrick, committee member | |
| dc.date.accessioned | 2016-01-11T15:13:46Z | |
| dc.date.available | 2016-01-11T15:13:46Z | |
| dc.date.issued | 2015 | |
| dc.description.abstract | The determination of biomass ignition from an inert spherical hotspot using a fourth-order finite-volume method is presented. The transient ignition-combustion system is modeled by two coupled reaction-diffusion equations. One equation governs the heating characteristics of the biomass while the other governs the mass loss of the biomass. The combustion assumes a one-step, 1st-order Arrhenius reaction. This work is motivated and funded by the Department of Defense Legacy Program to create a munition specific fire danger rating system. Improving fire danger rating systems on military lands would minimize the economic and environmental impact of soldiers training on protected habitats. A better understanding of these ignition characteristics would also improve current fire spread models. Our result shows that given the ignition criteria derived from a simplified non-dimensional model and specifying critical values found by Gol'dshleger et al., an ignition probability can be established by varying the biomass properties based on moisture content. Following the procedure developed in this thesis, the computed ignition probabilities correlate well with experimental ignition data that was obtained at the Center for Environmental Management of Military Lands. Moreover, numerically solving the coupled reaction-diffusion system provides additional insight into more realistic ignition criteria involving mass loss. The numerical solution suggests more sources of heat loss, in addition to convection, must be considered for a more realistic ignition model. | |
| dc.format.medium | born digital | |
| dc.format.medium | masters theses | |
| dc.identifier | McArdle_colostate_0053N_13307.pdf | |
| dc.identifier.uri | http://hdl.handle.net/10217/170336 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation.ispartof | 2000-2019 | |
| dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
| dc.subject | biomass combustion | |
| dc.subject | finite-volume method | |
| dc.subject | hotspot ignition | |
| dc.subject | reaction-diffusion | |
| dc.title | A numerical model for the determination of biomass ignition from a hotspot | |
| dc.type | Text | |
| dcterms.rights.dpla | This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). | |
| thesis.degree.discipline | Mechanical Engineering | |
| thesis.degree.grantor | Colorado State University | |
| thesis.degree.level | Masters | |
| thesis.degree.name | Master of Science (M.S.) |
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