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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Dual Fuel Combustion in a Cylinder Compression and Expansion Process

Get access (open in a dialog) DOI: 10.1615/IHTC12.5060
6 pages

Résumé

The introduction of alternative fuels such as natural gas (NG), liquefied petroleum gas (LPG), ethanol and methanol for engines is likely to occur at an increasing rate in the near future because there are important emission and resource benefits. While these fuels, are not generally suitable for CI (diesel) engines because of their low cetane numbers, the dual-fuel (DF) concept using pre-mixed alternative fuel ignited by a pilot diesel fuel spray provides a solution. In this program, fundamental experimental studies have been followed to study NG-DF constant volume combustion and a corresponding 3-D Finite Volume Method (FVM) code has been developed. The model has now been extended to a variable volume, closed system, by incorporating a moving boundary (piston) allowing combustion during compression and expansion to be studied. Model calibration has been obtained using experiments on a diesel/dual fuel engine with good agreement between the experimental and numerical pressure-time data. Parametric studies using this model for a range of conditions are available.