轮缘推进器叶片构型参数和水下辐射噪声的关联性研究

Study on the relevance between blade parameters and underwater radiated noise for rim-driven thruster

摘要: 【目的】探究轮缘推进器叶片构型参数对其水动力性能和噪声性能的影响。【方法】采用URANS/IDDES/LES湍流模型结合P-FWH方程的混合方法，在均匀流和无空化条件下对轮缘推进器的性能进行了评估，并对其尾迹演化进行了讨论。【结果】推进效率高于55%，500Hz频带内声压级低于90dB的设计方案，叶片螺距主要分布在1.2D至1.6D范围，叶梢弦长主要分布在0.25D至0.3D范围。【结论】本研究可为轮缘推进器的设计效率提供支持。

Abstract: Objectives To examine how blade design parameters impact the hydrodynamic and hydroacoustic performance of a rim-driven thruster. Methods The evaluation of the rim-driven thruster’s performance utilized a hybrid approach of the URANS/IDDES/LES solver combined with the P-FWH equations under uniform flow and non-cavitation conditions. The discussion focuses on the evolution of its wake. Results For propulsion efficiency greater than 55%, the sound pressure level in the 500Hz band is below 90dB in the design scheme. The blade pitch is mainly distributed in the range of 1.2D to 1.6D, and the blade tip chord length is mainly distributed in the range of 0.25D to 0.3D. Conclusions This study supports the design efficiency of rim-driven thrusters.