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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
School of Mechanical, Industrial and Manufacturing Engineering, Oregon State University,
204 Rogers Hall, Corvallis, OR 97331, USA
Department of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, MN 55455, USA
Center for Turbulence Research, Stanford University, Stanford, CA 94305, USA
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