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Transverse acoustic forcing of non-premixed flames: Injector acoustics, flame dynamics and flame response modeling

Event Type: 
Date and Time: 
Friday, February 11, 2022 - 16:15
Building 300 Room 300
Event Sponsor: 
Parviz Moin, Director of Center for Turbulence Research
Dr. Davy Brouzet

Combustion instabilities (CIs) are one of the major challenges for the design and operation of gas turbines and rocket engines. While most studies examined CIs for premixed systems due to their propensity to be more unstable, instabilities have also been observed in partially premixed and non-premixed flames for a variety of configurations. This talk will tackle three aspects crucial to the understanding of transverse CIs in non-premixed systems: the response of the injector flow to acoustic excitation, the coupling mechanisms occurring in acoustically forced flames, and the modeling of the flame response. Theoretical analysis, numerical simulation results and low-order modeling of a non-premixed flame under transverse acoustic forcing will be presented, which will demonstrate the acoustic and flow mechanisms affecting the flame response.

Dr. Davy Brouzet has been a postdoctoral researcher at the Stanford Center for Turbulence Research since October 2020. He obtained his Bachelor and Master degrees from the Swiss Federal Institute in Lausanne (EPFL) in 2012 and 2014, respectively. Then, he pursued his PhD at the University of Melbourne under the supervision of Prof. Michael Brear and Dr. Mohsen Talei, studying combustion noise in turbulent premixed flames using direct numerical simulations. During this time, he was fortunate to collaborate with researchers from Caltech and CERFACS. His research interests include turbulent combustion, detonations, aero-acoustics and combustion noise, and numerical methods for reacting flows.