A Numerical Study of the Transient Evaporating Spray Mixing Process in the Diesel Environment 831735
Some results of a systematic study of the effects of fuel and chamber gas properties on the transient evaporating spray mixing process are presented. The study uses an existing two-dimensional stochastic thick spray model. The results show that the combustion process in typical heavy duty, quiescent, DI diesel engines can be mixing limited rather than vaporization limited. In addition, the results show that the mixing process of a transient evaporating spray is characterized by the combined effects of fuel evaporation and its turbulent mixing with the surrounding air. In general, increasing the evaporation rate alone does not necessarily increase the fuel-air mixing rate. Furthermore, two dimensionless parameters have been used to quantify the relative effects of fuel and chamber gas properties on the transient spray evaporation process. Finally, through detailed comparisons between spray and gas jet results, the transient evaporating spray mixing process is better understood. With this understanding, further modification of the phenomenological jet mixing model published earlier can and will be made.
Citation: Kuo, T., Yu, R., and Shahed, S., "A Numerical Study of the Transient Evaporating Spray Mixing Process in the Diesel Environment," SAE Technical Paper 831735, 1983, https://doi.org/10.4271/831735. Download Citation
Author(s):
T.W. Kuo, R. C. Yu, S. M. Shahed
Affiliated:
Cummins Engine Co., Inc.
Pages: 18
Event:
1983 SAE International Fall Fuels and Lubricants Meeting and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Combustion of Heterogeneous Mixtures-SP-0557
Related Topics:
Diesel / compression ignition engines
Combustion and combustion processes
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