GRADUATE SEMINAR - Modeling Multiphase Flows for Aerospace Combustion Applications, by Dr. Marios C. Soteriou, United Technologies Research Center, East Hartford, CT

Education - Colloquium - WPI Only

Wednesday, January 30, 2013
2:00 PM-3:00 PM

Higgins Laboratories
HL 116

Mutliphase flows of the form of fuel sprays and thin films play a critical role in the performance of combustion
devices such as aeroengine combustors, augmentors ramjets and rockets. Ability to predict the behavior of these
flows has remained a challenge, however, due to the complexity of the multi-scale and multi-physics processes
involved and the severe limitations of experimental techniques in quantifying the multiphase flow characteristics.
This seminar will describe recent efforts at the United Technologies Research Center to advance the state of the
art in modeling and simulation of these flows. The emphasis is on liquid fuel atomization, transport and evaporation
and the objective is to obtain predictive models that are able to reproduce both dynamic and average features of the
flow. A number of models will be briefly reviewed, including data-driven dynamic models and a variety of Computational
Fluid Dynamic (CFD) models of different levels of fidelity. To facilitate this discussion a brief description of
leading numerical techniques (and related challenges) for the simulation of these flows will be given. The presentation
will then focus in more detail on the highest fidelity model - one that aims to get as close as possible to Direct
Numerical Simulation. The model employs a Combined Level-Set and Volume Of Fluid methodology to capture the surface of
the contiguous liquid and transforms the smallest, spherical structures into Lagrangian droplets in an effort to mitigate
cost at the minimum loss of fidelity. Validation studies will be presented for two atomization problems those of impinging
liquid jets and liquid jet in cross-flow. In each case a discussion of key physics, revealed in substantial detail by the
model, will also be included.

Suggested Audiences: College

E-mail: mdemetri@wpi.edu
Phone: 508-831-5459

Last Modified: January 23, 2013 at 3:27 PM

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