Mechanical Engineering


Webinar: Taming the “ghost” of gas turbines and rocket engines

12 July 2022, 1:00 pm–2:00 pm

Aircraft engine

Explore thermoacoustic mechanisms with Dr Dong Yang – Associate Professor at the Southern University of Science and Technology, Shenzhen.

This event is free.

Event Information

Open to







Nelia Jurado – UCL Mechanical Engineering

What the webinar will address

Thermoacoustic instabilities – also known as “combustion instabilities” – come from the positive feedback between acoustics and unsteady combustion. The compactness and intensive heat release in gas turbine and rocket engine combustors means that this coupling can generate catastrophically large pressure oscillations.

Predicting this occurence is very difficult however, since it requires resolving couplings across very different scales – acoustics, turbulence, and combustion. A process of trial and error involving many expensive full-scale tests is usually needed to ensure that this instability is safely avoided. As a result, thermoacoustic instabilities have been given the moniker of “ghost” of aero- and rocket engines.

Dr Yang's talk will explore the state-of-the-art solutions currently available for predicting and mitigating thermoacoustic instabilities, as well as low-order network modelling methodology and vortex-sound-entropy coupling theories.

The talk will be taking place on 12 July from 1–2pm via Zoom.

About the Speaker

Dr Dong Yang

Dr Dong Yang is Associate Professor at the Southern University of Science and Technology, Shenzhen. His research focuses on predicting thermoacoustic instabilities, with expertise in low-order network modelling and vortex-sound-entropy coupling theory. He received his degrees from Tsinghua University in Beijing, and his PhD from Imperial College London. Dr Yang's work – which won the Osborne Reynolds student Award 2017 for being among the six PhDs in Fluid Mechanics in the UK – has been highlighted by the Journal of Sound and Vibration as the "2017 highlight of aeroacoustics research in Europe”. Dr Yang has been invited to speak at or collaborate with leading companies such as Siemens, Reaction Engines, Shanghai Electric, Rolls-Royce, and AECC CAE. He is an organiser and co-chair of the 23rd International Congress on Acoustics, the Combustion Webinar, the 11th National Fluid Mechanics conference of China and the 51st Inter-Noise Conference.