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Diesel Spray Characterization and Numerical Simulation Using Eulerian-Lagrangian Model
Technical Paper
2014-36-0321
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Fulfill emission restrictions is the most challenging task of future engines development. In this context, improvements with regard to the spray and mixture formation in internal combustion engines are necessary. Experimental investigation and numerical simulation have been used to predict and analyze complex in cylinder processes. In this paper, a diesel spray characterization using optical diagnostics was made in order to provide input data and boundary conditions for a diesel spray computational fluid dynamics simulation (CFD), using the Eulerian-Lagrangian model. Combining the advantages of Eulerian and Lagrangian approaches, this model is able to predict continuously the whole spray evolution. The main difficulty of numerical spray simulation is the correct representation of the two characteristic spray zones: dense near the nozzle and dilute downstream. In the dense zone, the spray and its gaseous environment are presented as an effective single-phase fluid with a highly variable density. To describe the liquid dispersion, the transport equations for the liquid mass fraction and for the liquid/gas interface density are solved. The transition to the Lagrangian calculation is applied when the spray is considered to be diluted enough. Spray characteristics such as cone angle, velocity field, and tip penetration were determined. Simulations were carried out at the CTM - UFMG (Technology Center of Mobility - UFMG).
Authors
- Deborah Domingos da Rocha - Technology Center of Mobility-UFMG
- Marcio Expedito Guzzo - Technology Center of Mobility-UFMG
- Carlos Alberto Gomes Júnior - Technology Center of Mobility-UFMG
- Roberto Berlini Rodrigues da Costa - Technology Center of Mobility-UFMG
- Raniro de Oliveira Alvarenga Coelho - Technology Center of Mobility-UFMG
Citation
da Rocha, D., Guzzo, M., Gomes Júnior, C., da Costa, R. et al., "Diesel Spray Characterization and Numerical Simulation Using Eulerian-Lagrangian Model," SAE Technical Paper 2014-36-0321, 2014, https://doi.org/10.4271/2014-36-0321.Also In
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