Modeling of Diesel Sprays in a Very High Pressure Chamber, Part II: Effects of Combustion 950603
Results of two- and three-dimensional computations of combustion of Diesel sprays in a very high-pressure chamber are presented. A wide range of experimental conditions are considered. Peak chamber pressure with combustion range from about 6.0 MPa to about 20 MPa. Computed and measured spray penetrations and chamber pressures are compared and shown to be in adequate agreement. Autoignition is modeled using an equation for a progress variable which measures the local and instantaneous tendency of the fuel to autoignite. High temperature chemistry is modeled using a local equilibrium model coupled to a combination of laminar and turbulent characteristic times. It is shown that scaling rules which were found to apply in vaporizing and non-vaporizing sprays also apply in the combusting sprays. The fuel-air mixing rates and burning rates increase as the ratio of the ambient density to injected density increases.
Citation: Hou, Z., Abraham, J., and Siebers, D., "Modeling of Diesel Sprays in a Very High Pressure Chamber, Part II: Effects of Combustion," SAE Technical Paper 950603, 1995, https://doi.org/10.4271/950603. Download Citation
Author(s):
Z.-X. Hou, J. Abraham, D. L. Siebers
Affiliated:
University of Minnesota
Pages: 15
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Diesel Engine Combustion Processes-SP-1092, SAE 1995 Transactions: Journal of Engines-V104-3
Related Topics:
Combustion and combustion processes
Simulation and modeling
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