Numerical Simulations of Natural Gas Injection Pressure Effects on a Direct Injected, Pilot Ignited, Natural Gas Engine

Abstract:

Pilot-ignited direct injection of natural gas fueling of a compression ignition engine has been shown to keep high thermal efficiency as diesel engines. To further investigate the combustion process, the effect of natural gas injection pressure on combustion in a diesel engine fueled with pilot-ignited directly-injected natural gas was studied by multidimensional simulations while engine speed and other injection parameters were held constant. NO emissions are increased by higher gas injection pressure without significantly affecting cylinder pressure. By increasing gas injection pressure, HC emissions are reduced with the increase of cylinder temperature. The data got contributes to the development of the pilot-ignited high pressure direct injection natural gas engine.

• Periodical: Applied Mechanics and Materials (Volume 510)
• Pages: 179-184
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.510.179
• Online since: February 2014
• Authors: Ying Gao, Xiao Xiao Li, Jun Li, Lei Zhang, Shu Hua Li
• Keywords: Pilot-Ignited High Pressure Directly-Injected Natural Gas STAR-CD

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