Exploring the relationship between combustion noise and thermoacoustic instability

 

Abstract:

Land-based gas turbines (GTs) account for approximately 20% of the global installed capacity for electricity generation. One of the advantages of GTs is their fast ramp up and down capabilities, complementing intermittent renewable generation sources. Furthermore, as the interest in producing renewable hydrogen grows, GTs emerge as key players in creating a hydrogen economy. Thermoacoustic instability, often initiated by combustion-generated sound, can be a big issue in dry, low-emission GTs. Addressing this challenge requires a better understanding of this problem and high-fidelity simulations such as direct numerical simulation (DNS) and large-eddy simulation (LES) can become very useful in this regard. In this seminar, I will provide examples from our DNS and LES studies, examining the relationship between thermoacoustic instability and combustion noise.

 

Bio:

A/Prof. Mohsen Talei is an International Hydrogen Research Fellow of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and a former Discovery Early Career Researcher (DECRA Fellow) of the Australian Research Council (ARC). He is an Associate Professor in the Department of Mechanical Engineering at the University of Melbourne and the Degree Coordinator of the Master of Energy Systems. 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 about 20 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.