Optimal acoustic design of a composite marine propeller for signature management. Noise of maritime vessels affects passengers, crew and marine life. Composite marine propellers provide significant benefits over metallic propellers as they run more efficiently, thus consuming less fuel and run more smoothly, resulting in improved comfort for passengers and crew. From a military perspective, composite marine propellers provide reduced noise signature, resulting in vessels of greater stealth. Quie ....Optimal acoustic design of a composite marine propeller for signature management. Noise of maritime vessels affects passengers, crew and marine life. Composite marine propellers provide significant benefits over metallic propellers as they run more efficiently, thus consuming less fuel and run more smoothly, resulting in improved comfort for passengers and crew. From a military perspective, composite marine propellers provide reduced noise signature, resulting in vessels of greater stealth. Quieter propellers also significantly reduce the environmental impact of ships on marine life. This project will generate a new class of quiet composite propellers to be utilised by the maritime industry. The technologies developed by this project are applicable to rotors in other industries, such as aircraft, helicopters and wind turbines.Read moreRead less
Dominant flow noise source identification for ducted marine propellers. Ducted marine propellers are becoming an increasing alternative to conventional open propellers. Understanding flow-induced noise generated by ducted propellers is a key consideration in the design process to minimise noise emission. This project aims to develop new methods to identify turbulent flow sources of a ducted marine propeller that dominate sound. High-fidelity numerical methods will be developed to study the compl ....Dominant flow noise source identification for ducted marine propellers. Ducted marine propellers are becoming an increasing alternative to conventional open propellers. Understanding flow-induced noise generated by ducted propellers is a key consideration in the design process to minimise noise emission. This project aims to develop new methods to identify turbulent flow sources of a ducted marine propeller that dominate sound. High-fidelity numerical methods will be developed to study the complex interaction between inflow turbulence, support struts, propeller blades and duct structure. Successful identification of the dominant sources of noise will allow for targeted noise mitigation strategies with significant impact for stealth of military vessels and reduction of underwater noise pollution on marine life.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE190101412
Funder
Australian Research Council
Funding Amount
$338,858.00
Summary
Efficient prediction of flow-induced noise for marine vessels. This project aims to develop efficient and novel numerical methods in hydroacoustics for comparative studies of design modifications and operating conditions on noise generated by turbulent flow around marine vessels. Flow induced noise generated by marine vessels presents unique challenges for noise prediction methods which often results in vessels that do not meet their design specifications. The expected outcome is to provide effi ....Efficient prediction of flow-induced noise for marine vessels. This project aims to develop efficient and novel numerical methods in hydroacoustics for comparative studies of design modifications and operating conditions on noise generated by turbulent flow around marine vessels. Flow induced noise generated by marine vessels presents unique challenges for noise prediction methods which often results in vessels that do not meet their design specifications. The expected outcome is to provide efficient numerical capabilities that can play a role towards the design of quieter marine vessels to increase the stealth of Australia’s navy. This project will provide significant benefit to Australia’s maritime platforms and future submarine program. Environmental benefits include a reduction of anthropogenic underwater noise pollution from marine vessels, which is critical for the welfare of marine life.Read moreRead less
Prediction of radiated noise from marine propellers. Underwater noise radiated from marine vessels is a significant problem for research, fishing and military vessels, and is a major source of pollution in the marine environment. The major source contributing to underwater noise is due to the propeller. This work will develop numerical models with experimental validation that can accurately predict the sources of noise generated by marine propellers and acoustic signatures of marine vessels due ....Prediction of radiated noise from marine propellers. Underwater noise radiated from marine vessels is a significant problem for research, fishing and military vessels, and is a major source of pollution in the marine environment. The major source contributing to underwater noise is due to the propeller. This work will develop numerical models with experimental validation that can accurately predict the sources of noise generated by marine propellers and acoustic signatures of marine vessels due to propeller motion. This work has great significance for Australia’s construction and military maritime industries. The technologies developed in this project are also applicable to rotors in other industries such as in aircraft, helicopters and wind turbines.Read moreRead less
Tailoring composite propellers for reduced sound radiation. This project aims to explore the generation of noise by composite propellers and to use this understanding to tailor the composite properties to reduce underwater noise. Propellers are a harmful source of noise in the marine environment, disturbing animal behaviour, revealing the location of naval vessels and interfering with sonar operation. Adaptive composite propellers are potentially quieter than metal propellers, as well as offerin ....Tailoring composite propellers for reduced sound radiation. This project aims to explore the generation of noise by composite propellers and to use this understanding to tailor the composite properties to reduce underwater noise. Propellers are a harmful source of noise in the marine environment, disturbing animal behaviour, revealing the location of naval vessels and interfering with sonar operation. Adaptive composite propellers are potentially quieter than metal propellers, as well as offering improvements in efficiency and fuel consumption. The aims of this project are to understand the physical mechanisms associated with composite propeller noise generation. The outcomes are intended to provide advanced numerical capabilities that will support the development of quieter marine propeller designs to improve defence capability and the acoustic environment for marine mammals.Read moreRead less