Article
 

Large eddy simulations for radiation-spray coupling for a lean direct injector combustor

Público Deposited

Conteúdo disponível para baixar

Baixar PDF
https://ir.library.oregonstate.edu/concern/articles/g158bk20w

Descriptions

Attribute NameValues
Creator
Abstract
  • Large Eddy Simulations (LESs) for a lean-direct injection (LDI) combustor are performed and compared with experimental data. The LDI emissions characteristics, and radiation-spray coupling effect on the predictions are analyzed. The flamelet progress variable approach is employed for chemistry tabulation coupled with a stochastic secondary breakup model. Good comparisons are shown with the experimental data mean and root mean square for both the gas phase and spray droplets profiles. The effect of combustion is found to change the shape and structure of the central recirculation zone to be more compact in length but larger in diameter in the transverse direction. In-addition the results show that the gas phase radiation alters the spray dynamics by changing the local gas-phase temperature distribution. This impacts the spray evaporation rate, the local mixture fraction, and consequently the combustion heat released rate and the predicted emissions. The simulation with no radiation modeling shows over prediction in the temperature distribution, pollutants emissions, higher fuel evaporation rate, and narrower range of droplet size distribution with lower number density for the smaller size particles. The current study suggests that, even for low pressure systems, radiation modeling can be important for accurate emissions prediction.
  • Keywords: Stochastic secondary breakup, Spray modeling, Large eddy simulation, Turbulent flames, Radiation, Lean direct injection
Resource Type
DOI
Date Available
Date Issued
Citation
  • El-Asrag, H. A., Iannetti, A. C., & Apte, S. V. (2014). Large eddy simulations for radiation-spray coupling for a lean direct injector combustor. Combustion and Flame, 161(2), 510-524. doi:10.1016/j.combustflame.2013.09.020
Journal Title
Journal Volume
  • 161
Journal Issue/Number
  • 2
Declaração de direitos
Funding Statement (additional comments about funding)
  • This work is funded by NASA Glenn Research Center.
Publisher
Peer Reviewed
Language
Replaces

Relações

Parents:

This work has no parents.

Itens

Miniatura Título Data de carga Acesso Ações
file details ApteSourabhMechanicalIndustrialManufacturingEngineeringLargeEddySimulations.pdf 07/26/2017 Público
file details ApteSourabhMechanicalIndustrialManufacturingEngineeringLargeEddySimulations_SupplementaryVideo.mov 07/26/2017 Público