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oai:mountainscholar.org:10217/2376772025-12-30T03:40:57Zcom_10217_100532com_10217_100000com_10217_100470com_10217_100303col_10217_100538col_10217_100472

DeFoort, Morgan, author Yalin, Azer, advisor Willson, Bryan, advisor 2024-03-13T19:26:11Z 2024-03-13T19:26:11Z 2009 ETDF_DeFoort_2009_3385168.pdf https://hdl.handle.net/10217/237677 https://doi.org/10.25675/3.018972 In the effort to reduce emissions and improve the efficiency of Otto cycle engines, the ignition system is often a limiting factor. Many "high energy" ignition systems have been developed, but almost all of these are based on traditional electric arc spark plugs. Laser ignition represents a fundamentally different approach to igniting gas mixtures and opens the door to improvements in fuel-lean engine operation and high-pressure combustion environments. Yet the promise of laser ignition remains unexploited, as practical systems have not been developed. In this contribution, we work towards the goal of developing a practical laser ignition system for stationary natural gas engines. Specifically, we focus on fiber optic delivery of the laser beam to the engine, thereby making a significant advance relative to past open-air (free-space) configurations. A combination of modeling and experimentation has been used to develop the needed fiber optic delivery systems, culminating in the first demonstration of fiber-optically delivered laser ignition on an engine. born digital doctoral dissertations English eng Colorado State University. Libraries 2000-2019 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. Per the terms of a contractual agreement, all use of this item is limited to the non-commercial use of Colorado State University and its authorized users. emissions reduction fiber optic delivery internal combustion engines laser ignition natural gas mechanical engineering Laser ignition for internal combustion engines via fiber optic delivery Text Doctor of Philosophy (Ph.D.) Doctoral Mechanical Engineering Colorado State University 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). open.access