Abstract:
Lean premixed combustion is the desired combustion regime in industrial gas turbines. It results in a low level of NOX emissions due to operating at lower temperatures and facilitates better combustion efficiency. However, the main issue with operating gas turbines in this regime is thermoacoustic instability, commonly initiated by combustion-generated sound. This issue is a significant drawback for developing cleaner gas turbines featuring stable combustion. This presentation aims to demonstrate how direct numerical simulation (DNS) can provide insights into the mechanism of sound generation by premixed flames and how the existing modelling frameworks need to be improved to simulate industrial-scale gas turbines.

Biography:
A/Prof. Mohsen Talei is a former Discovery Early Career Researcher (DECRA Fellow) of the Australian Research Council (ARC) and an Associate Professor in the Department of Mechanical Engineering at the University of Melbourne. Mohsen joined the University of Melbourne as a staff member in 2014, having previously completed post-doctoral research at the University of New South Wales (UNSW) and a PhD at the University of Melbourne. Mohsen has 18 years of industry and academic research experience in the broad area of energy with a focus on low-emission energy technologies. Mohsen’s research involves a significant use of high-performance computing to develop reliable models that can be used for simulating cleaner gas turbines and reciprocating engines.