Photographic and Performance Studies of Diesel Combustion With a Rapid Compression Machine 740948
Photographic and performance studies with a Rapid Compression Machine at the Massachusetts Institute of Technology have been used to develop insight into the role of mixing in diesel engine combustion. Combustion photographs and performance data were analyzed. The experiments simulate a single fuel spray in an open chamber diesel engine with direct injection. The effects of droplet formation and evaporation on mixing are examined. It is concluded that mixing is controlled by the rate of entrainment of air by the fuel spray rather than the dynamics of single droplets. Experimental data on the geometry of a jet in a quiescent combustion chamber were compared with a two-phase jet model; a jet model based on empirical turbulent entrainment coefficients was developed to predict the motion of a fuel jet in a combustion chamber with swirl. Good agreement between theory and experiment was obtained. The fuel and air mixing rate was estimated from the jet models and compared with combustion rates measured in the Rapid Compression Machine.
Citation: Rife, J. and Heywood, J., "Photographic and Performance Studies of Diesel Combustion With a Rapid Compression Machine," SAE Technical Paper 740948, 1974, https://doi.org/10.4271/740948. Download Citation
Author(s):
Joe Rife, John B. Heywood
Affiliated:
Massachusetts Institute of Technology
Pages: 20
Event:
International Automobile Engineering and Manufacturing Meeting
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1974 Transactions-V83-A
Related Topics:
Combustion chambers
Diesel / compression ignition engines
Fuel injection
Combustion and combustion processes
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