Article
 

ApteSourabhMechanicalIndustrialManufacturingEngineeringLargeEddySimulations_SupplementaryVideo.mov

Público Deposited

Contenido Descargable

Descargar video
https://ir.library.oregonstate.edu/concern/articles/q811km536

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: Turbulent flames, Lean direct injection, Radiation, Stochastic secondary breakup, Spray modeling, Large eddy simulation
  • Keywords: Turbulent flames, Lean direct injection, Radiation, Stochastic secondary breakup, Spray modeling, Large eddy simulation
  • Keywords: Turbulent flames, Lean direct injection, Radiation, Stochastic secondary breakup, Spray modeling, Large eddy simulation
  • Keywords: Turbulent flames, Lean direct injection, Radiation, Stochastic secondary breakup, Spray modeling, Large eddy simulation
Declaración de derechos

Relaciones

Parents:

Elementos

Miniatura Título Fecha de subida Visibilidad Acciones
file details ApteSourabhMechanicalIndustrialManufacturingEngineeringLargeEddySimulations_SupplementaryVideo.mov 2017-07-26 Público Descargar