Modeling JP-8 Fuel Effects on Diesel Combustion Systems
ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI
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The U.S. Army currently utilizes Jet Propulsion 8 JP-8 and Diesel Fuel number 2 DF-2 as the two prime fuels for ground mobility applications. These two fuels have significant physicochemical property differences such as density, distillation curve, and cetane number that may result in fuel-affected varying combustion behavior in diesel engines under various operating conditions. Since engine manufacturers rely solely on DF-2 for commercial vehicle applications most domestic industry, university, and national laboratory lead diesel engine combustion system research activities have not encompassed JP fuels. Instead, much effort has been spent exploring DF-2 evaporation behavior, pre-ignition kinetics, high pressure spray formation and subsequent energy release processes, particulate matter formation and oxidation, and nitrous oxide formation pathways under diesel relevant pressures and temperatures. To date, there is little information published in the literature on the topic of JP-8 spray combustion though some activities have recently begun to address specific sub-processes including low temperature chemistry, ignition chemistry, and turbulent flame speed, but at thermodynamic conditions near the lower end of typical diesel combustion conditions.
- Physical Chemistry
- Combustion and Ignition
- Jet and Gas Turbine Engines