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Fundamental Studies of Ignition Process in Large Natural Gas Engines Using Laser Spark Ignition.

DE2008939620

Publication Date	2008
Personal Author	Azer, Y.; Bryan, W.
Page Count	44
Abstract	Past research has shown that laser ignition provides a potential means to reduce emissions and improve engine efficiency of gas-fired engines to meet longer-term DOE ARES (Advanced Reciprocating Engine Systems) targets. Despite the potential advantages of laser ignition, the technology is not seeing practical or commercial use. A major impediment in this regard has been the 'open-path' beam delivery used in much of the past research. This mode of delivery is not considered industrially practical owing to safety factors, as well as susceptibility to vibrations, thermal effects etc. The overall goal of our project has been to develop technologies and approaches for practical laser ignition systems. To this end, we are pursuing fiber optically coupled laser ignition system and multiplexing methods for multiple cylinder engine operation. This report summarizes our progress in this regard. A partial summary of our progress includes: development of a figure of merit to guide fiber selection, identification of hollow-core fibers as a potential means of fiber delivery, demonstration of bench-top sparking through hollow-core fibers, single-cylinder engine operation with fiber delivered laser ignition, demonstration of bench-top multiplexing, dual-cylinder engine operation via multiplexed fiber delivered laser ignition, and sparking with fiber lasers. To the best of our knowledge, each of these accomplishments was a first.
Keywords	Natural gas Engines Ignition systems Efficiency Fibers Safety Targets Lasers Performance Natural gas engines
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Colorado State Univ., Fort Collins.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200907
Contract Number	DE-FC26-02NT41335

Fundamental Studies of Ignition Process in Large Natural Gas Engines Using Laser Spark Ignition.

Fundamental Studies of Ignition Process in Large Natural Gas Engines Using Laser Spark Ignition.
DE2008939620

Publication Date	2008
Personal Author	Azer, Y.; Bryan, W.
Page Count	44
Abstract	Past research has shown that laser ignition provides a potential means to reduce emissions and improve engine efficiency of gas-fired engines to meet longer-term DOE ARES (Advanced Reciprocating Engine Systems) targets. Despite the potential advantages of laser ignition, the technology is not seeing practical or commercial use. A major impediment in this regard has been the 'open-path' beam delivery used in much of the past research. This mode of delivery is not considered industrially practical owing to safety factors, as well as susceptibility to vibrations, thermal effects etc. The overall goal of our project has been to develop technologies and approaches for practical laser ignition systems. To this end, we are pursuing fiber optically coupled laser ignition system and multiplexing methods for multiple cylinder engine operation. This report summarizes our progress in this regard. A partial summary of our progress includes: development of a figure of merit to guide fiber selection, identification of hollow-core fibers as a potential means of fiber delivery, demonstration of bench-top sparking through hollow-core fibers, single-cylinder engine operation with fiber delivered laser ignition, demonstration of bench-top multiplexing, dual-cylinder engine operation via multiplexed fiber delivered laser ignition, and sparking with fiber lasers. To the best of our knowledge, each of these accomplishments was a first.
Keywords	Natural gas Engines Ignition systems Efficiency Fibers Safety Targets Lasers Performance Natural gas engines
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Colorado State Univ., Fort Collins.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200907
Contract Number	DE-FC26-02NT41335