Dominant flow noise source identification for ducted marine propellers

船用管道螺旋桨正逐渐成为传统开式螺旋桨的替代品。了解由导管螺旋桨产生的流致噪声是设计过程中最大限度地减少噪声排放的关键考虑因素。本项目旨在开发新的方法来识别主导声音的导管船用螺旋桨的湍流流源。将发展高保真的数值方法来研究来流湍流、支板、螺旋桨叶片和风道结构之间复杂的相互作用。成功地确定主要噪声源将有助于制定有针对性的噪声缓解战略，对军舰的隐身性和减少对海洋生物的水下噪声污染产生重大影响。

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.