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Center for Turbulence Research Annual Research Briefs 2003
 

Summary: Center for Turbulence Research
Annual Research Briefs 2003
161
A Eulerian-Lagrangian model to simulate
two-phase/particulate flows
By S. V. Apte, K. Mahesh, & T. Lundgren
1. Motivation and Objectives
Figure 1 shows a snapshot of liquid fuel spray coming out of an injector nozzle in
a realistic gas-turbine combustor. Here the spray atomization was simulated using a
stochastic secondary breakup model (Apte et al. 2003a) with point-particle approxima-
tion for the droplets. Very close to the injector, it is observed that the spray density is
large and the droplets cannot be treated as point-particles. The volume displaced by the
liquid in this region is significant and can alter the gas-phase flow and spray evolution.
In order to address this issue, one can compute the dense spray regime by an Eulerian-
Eulerian technique using advanced interface tracking/level-set methods (Sussman et al.
1994; Tryggvason et al. 2001; Herrmann 2003). This, however, is computationally in-
tensive and may not be viable in realistic complex configurations. We therefore plan to
develop a methodology based on Eulerian-Lagrangian technique which will allow us to
capture the essential features of primary atomization using models to capture interac-
tions between the fluid and droplets and which can be directly applied to the standard

  

Source: Apte, Sourabh V. - School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University
Mahesh, Krishnan - Department of Aerospace Engineering and Mechanics, University of Minnesota

 

Collections: Engineering