轮缘推进器叶片构型参数和水下辐射噪声的关联性

Correlation between blade parameters and underwater radiated noise of rim-driven thruster

摘要:
目的旨在探究轮缘推进器叶片构型参数对其水动力及噪声性能的影响。
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评估，并讨论其尾迹演化特点。
结果结果显示，采用所提方法推进效率大于55%，在500 Hz频带内的声压级低于90 dB的设计方案，叶片螺距主要分布在1.2D～1.6D区间，叶梢弦长主要分布在0.25D～0.3D区间。
结论研究结果可为轮缘推进器的设计效率提供一定支持。

Abstract:
Objective This study aims to examine the impacts of the blade design parameters on the hydrodynamic and hydro-acoustic performance of a rim-driven thruster.
Methods The evaluation of the rim-driven thruster's performance is carried out using a hybrid approach wherein the URANS/IDDES/LES solver is combined with the P-FWH equations under uniform flow and non-cavitation conditions. The characteristics of its wake evolution are then discussed.
Results For propulsion efficiency greater than 55%, the sound pressure level in the 500 Hz frequency band is below 90 dB 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.
Conclusion The results of this study can provide valuable references for the design efficiency of rim-driven thrusters.