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Validation of Eulerian-Lagrangian Spray Atomization Modeling against Gasoline Fuel
Technical Paper
2021-01-5027
ISSN: 0148-7191, e-ISSN: 2688-3627
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Automotive Technical Papers
Language:
English
Abstract
Combustion in any engine starts with the injection of fuel into the combustion
chamber. Atomization of fuel and its mixing plays a vital role in determining
the suitable air-fuel (A/F) ratio. Appropriate A/F ratio determines the amount
of energy release and pollutant formation for standard engines. Thus an accurate
prediction of these processes is required to perform reliable combustion and
pollutant formation simulations. In this study, the Eulerian-Lagrangian Spray
Atomization (ELSA) model is implemented as a Computational Fluid Dynamics (CFD)
tool for the prediction of spray behavior. Past studies performed on diesel fuel
suggest good agreement between experiment and simulation indicating the model’s
capability. The study aims to validate the ELSA model for gasoline fuel against
the test results obtained from Renault and against the pure Lagrangian spray
model. The simulations have been performed using CONVERGE CFD v2.4.18. A
constant-volume spray bomb model consisting of a SAC is simulated across
different operating conditions with variations in temperatures and pressures.
The nozzle geometry has been simplified and is assumed to be circular in
cross-section. Macroscopic and microscopic spray characteristics, namely, Spray
(Liquid) Penetration Length and Sauter Mean Diameter (SMD), are compared. The
first section of the results deals with a comparison between simulation and test
data, whereas the second and third sections describe the comparison of spray
characteristics between the ELSA and Lagrangian spray description against the
test results and the variation of spray characteristics concerning state
properties, respectively. The results obtained using the ELSA model are in good
agreement with the experimental results, but require further enhancement when
compared against the Lagrangian description. The spray prediction furthermore is
in accordance with the spray behavior and is theoretically explainable.
Authors
Citation
Srujan, V., Subramanian, D., Nagaraja, S., Rathinam, B. et al., "Validation of Eulerian-Lagrangian Spray Atomization Modeling against Gasoline Fuel," SAE Technical Paper 2021-01-5027, 2021, https://doi.org/10.4271/2021-01-5027.Data Sets - Support Documents
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