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Large-eddy simulation of evaporating spray in a coaxial combustor
 

Summary: Large-eddy simulation of evaporating spray
in a coaxial combustor
Sourabh V. Apte a,*, Krishnan Mahesh b
, Parviz Moin c
a
School of Mechanical, Industrial and Manufacturing Engineering, Oregon State University,
204 Rogers Hall, Corvallis, OR 97331, USA
b
Department of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, MN 55455, USA
c
Center for Turbulence Research, Stanford University, Stanford, CA 94305, USA
Abstract
Large-eddy simulation of an evaporating isopropyl alcohol spray in a coaxial combustor is performed.
The Favre-averaged, variable density, low-Mach number Navier-Stokes equations are solved on unstruc-
tured grids with dynamic subgrid scale model to compute the turbulent gas-phase. The original incom-
pressible flow algorithm for LES on unstructured grids by [Mahesh et al., J. Comp. Phys. 197 (2004)
215240] is extended to include density variations and droplet evaporation. An efficient particle-tracking
scheme on unstructured meshes is developed to compute the dispersed phase. Experimentally measured
droplet size distribution and size-velocity correlation near the nozzle exit are used as the inlet conditions
for the spray. The predictive capability of the LES approach on unstructured grids together with Lagrang-

  

Source: Apte, Sourabh V. - School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University

 

Collections: Engineering