Development and validation of a thermodynamic model for an SI single cylinder engine

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:460451

Yacoub, Y M; Bata, R M ^[1]

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1. West Virginia Univ., Morgantown, WV (United States). Dept. of Mechanical and Aerospace Engineering

A multizone quasi-dimensional model that illustrates the intake, compression, combustion, expansion, and exhaust processes has been developed for a single cylinder four stroke spark-ignition internal combustion engine. The model takes into consideration mass and energy conservation in the engine cylinder, intake and exhaust plenums, and crank-case plenum. The model calculates instantaneous variations in gas thermodynamic states, gas properties, heat release rates, in-cylinder turbulence, piston ring motion, blowby, nitric oxide and carbon monoxide formation. A novel feature of this cycle simulation is that the induced gas velocities due to flame propagation are considered in the turbulence model ({kappa}-{epsilon} type). This allows for the natural evolution of the averaged mean and turbulent velocities in burned and unburned gas regions. The present model predictions of thermal efficiency, indicated mean effective pressure, peak values of gas pressure, ignition delay, concentrations of nitric oxide, carbon monoxide, and carbon dioxide are proven to be in agreement with previous experimental data.

• OSTI ID: 460451
• Report Number(s): CONF-9604188--; ISBN 0-7918-1766-0
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
COMBUSTION KINETICS
DIAGRAMS
FLAME PROPAGATION
SPARK IGNITION ENGINES
THERMAL EFFICIENCY
THERMODYNAMIC MODEL
TURBULENT FLOW