Influences of subgrid turbulent kinetic energy and turbulent dispersion on the characteristics of fuel spray

2011-01-1839

08/30/2011

Event
SAE International Powertrains, Fuels and Lubricants Meeting
Authors Abstract
Content
A large eddy simulation approach and different breakup models are used to analyze fuel injection and atomization processes in a constant volume combustion bomb. The study is focused on the influences of the subgrid turbulent kinetic energy, especially the source term induced by the fuel spray, on the droplet movement and spray characteristics. Furthermore, the influence of different subgrid scale (SGS) models, including the constant coefficient and dynamic Smagorinsky models, WALE model and the K-equation turbulent energy transport model, on fuel sprays and the turbulent dispersion of droplets are examined. Factors affecting the fuel spray are discussed based on numerical computations for various operating conditions and are compared with experimental data. Computational results show that the KH-RT breakup model is superior to the MTAB model, and both the subgrid turbulent energy source term induced by the spray and the turbulent dispersion of the droplets have important effects on the fuel spray, resulting in decreased spray penetration. The effect of the turbulent dispersion is found to be more prominent.
Meta TagsDetails
DOI
https://doi.org/10.4271/2011-01-1839
Pages
17
Citation
Zhou, L., Xie, M., Jia, M., Zhou, Q. et al., "Influences of subgrid turbulent kinetic energy and turbulent dispersion on the characteristics of fuel spray," SAE Technical Paper 2011-01-1839, 2011, https://doi.org/10.4271/2011-01-1839.
Additional Details
Publisher
Published
Aug 30, 2011
Product Code
2011-01-1839
Content Type
Technical Paper
Language
English