AAF International: Lowering noise emissions from gas turbines

This project aims to develop innovative techniques to lower structure-borne noise from intake and exhaust systems used by gas turbines in the power generation industry. This will provide significant benefits for organisations working in the noise control industry, and lead to new ways of lowering environmental noise caused by ducts and pipes.


Gas turbines used in power generation emit extreme levels of noise through their exhaust system. One of the major sources is the noise that escapes through the walls of the ductwork used in the exhaust stacks. Controlling this noise is difficult so AAF are looking for a better understanding of how to build exhaust stacks in order to minimise noise breaking out of the ductwork.



The UTS Tech Lab team will develop a new fundamental understanding of how sound radiates from the circular and rectangular ductwork used in exhaust stacks. This will enable the team to build new computer models, which will then be validated in our laboratories. Using these models, we will optimise duct designs to lower noise radiation for gas turbine exhausts. The models can also be used for any application where the break out of noise from ductwork is considered to be a problem.

3 years

Academic team
Associate Professor Ray Kirby
Dr Paul Williams


Engagement model
Joint-funded project

ARC Linkage

Future applications
Gas turbines used in power generation
Pipelines used in oil and gas industries
Ventilation systems & HVAC applications

Area of expertise
Infrastructure, utilities & transport