Date of Award

12-2017

Degree Type

Thesis

Degree Name

Master of Science in Aeronautics and Astronautics

Department

Aeronautics and Astronautics

Committee Chair

Haifeng Wang

Committee Member 1

Gregory A. Blaisdell

Committee Member 2

Terrence R. Meyer

Abstract

In this study, computational fluid dynamics (CFD) calculations for a turbulent pulsed jet flame are performed coupling Reynolds Average Navier-Stokes (RANS) k− model, Probability Density Function (PDF) with particle method and a 19-species reduced GRI chemistry reaction mechanism. In the first part of this study, a base flame of the turbulent pulsed jet flame, Sydney Flame L, is simulated for parametric studies to obtain optimal numerical and modeling settings, and these settings can be used in the turbulent pulsed jet flame to perform simulations accurately. The effect of mixing models and mixing parameter is emphasized in the parametric study since they have significant effect on the predicted extinction limit. In the second part of this study, comprehensive RANS/PDF simulations of turbulent pulsed jet flame are performed. The extinction gap, observed in experiment is reproduced by two out of three mixing models, with the extinction gap sensitive to mixing coefficient. Gap location history and velocity history are compared with experimental data at multiple selected locations. Good agreement has been achieved for the velocity field while the extinction gap show some deviation from experiment.

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