Characterization of direct injected propane and iso-octane at engine-like conditions in a high-pressure spray chamber
| dc.contributor.author | Windell, Brye Thomas, author | |
| dc.contributor.author | Windom, Bret C., advisor | |
| dc.contributor.author | Olsen, Daniel, committee member | |
| dc.contributor.author | Venayagamoorthy, Subhas Karan, committee member | |
| dc.date.accessioned | 2022-05-30T10:21:32Z | |
| dc.date.available | 2022-05-30T10:21:32Z | |
| dc.date.issued | 2022 | |
| dc.description.abstract | This thesis focuses on the recommission, modification, and testing of a high-pressure spray chamber (HPSC) and its role in aiding the experimental and numerical examination of direct injection (DI) propane at various engine-like conditions to address fundamental limitations of achieving near diesel efficiencies in heavy duty on-road liquified petroleum gas (LPG) engines. The HPSC was reconstructed and is capable of incorporating optical diagnostic techniques including high-speed Schlieren and planar Mie scattering imaging. High-speed Schlieren was used to characterize the global spray morphology and vapor phase regions while planar Mie scattering allowed for individual plume resolution providing insights into the liquid regions of the spray. These optical imaging techniques unveiled propane's spray propagation was fed by flash boiling effects, spray collapse, and high degree of vaporization, unlike iso-octane. This resulted in a direct proportionality of propane's penetration length to temperature, an inversely proportional relationship to ambient pressure, and a direct proportionality to injection pressure. Contrary to propane, iso-octane's spray morphology exhibited minor changes as temperatures and pressures were varied. Due to these unique effects, flash boiling, spray collapse, and high degree of vaporization, propane is classified as an unconventional spray, dissimilar to iso-octane's spray morphology. Experimental testing provided corrections to numerical models that were developed to reproduce the under-expanded jet dynamics. The numerical modeling results were found to be sensitive to cone and inclusion angles. The current work serves as preliminary results for an experimental validation campaign which aid in the numerical model development for future heavy duty on-road LPG engines. | |
| dc.format.medium | born digital | |
| dc.format.medium | masters theses | |
| dc.identifier | Windell_colostate_0053N_17160.pdf | |
| dc.identifier.uri | https://hdl.handle.net/10217/235218 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation.ispartof | 2020- | |
| 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 | engines | |
| dc.subject | imaging and visualization | |
| dc.subject | nozzles | |
| dc.subject | gasoline | |
| dc.subject | computational fluid dynamics | |
| dc.subject | liquefied petroleum gas | |
| dc.title | Characterization of direct injected propane and iso-octane at engine-like conditions in a high-pressure spray chamber | |
| 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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