Simulation Development of a Large Bore Two Stroke Integral Compressor Engine to Study Variable Natural Gas Composition Effects
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The overall goal of this project is to improve upon existing engine control strategies used for large bore, lean-burn, natural gas engines in order to increase efficiency and maintain emissions compliance during variable fuel composition events. The objective of this work is to develop a full-scale engine simulation of a Cooper-Bessemer GMWH-10C that includes the actual kinematics of an articulated crank in addition to a set of solutions to calculate laminar flame speed for a range of alkane mixtures. For engines with articulated cranks, the piston motion and port profiles are asymmetric and cannot be described as a simple slider-crank mechanism. The first part of this project was to derive the kinematic equations to explain this motion. The second part focused on the chemical kinetics and sought a way to generalize previously published equations to estimate laminar flame speed and ignition delay for a series of natural gas mixtures at a range of conditions. Then the developed piston motion, port profiles, and laminar flame speed equations were implemented into a full-scale engine model with predictive combustion capabilities that was tuned and validated against experimental data. In the future, this simulation can be used to develop control strategies to maintain performance and emissions compliance during variable fuel events.
SubjectInternal combustion engine
laminar flame speed
Fieseler, Kelsey Danielle (2018). Simulation Development of a Large Bore Two Stroke Integral Compressor Engine to Study Variable Natural Gas Composition Effects. Master's thesis, Texas A&M University. Available electronically from