Tailoring composite propellers for reduced sound radiation

该项目旨在探索复合材料螺旋桨产生的噪声，并利用这一认识来调整复合材料的性能，以降低水下噪音。螺旋桨是海洋环境中的有害噪声源，扰乱动物行为，暴露海军舰艇的位置，并干扰声纳操作。自适应复合材料螺旋桨可能比金属螺旋桨更安静，并在效率和燃料消耗方面提供改进。本项目的目的是了解与复合螺旋桨噪声产生相关的物理机制。这些成果旨在提供先进的数值能力，支持开发更安静的海洋螺旋桨设计，以改善海洋哺乳动物的防御能力和声学环境。

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.