Numerical aeroacoustic analysis of propeller designs
Numerical aeroacoustic analysis of propeller designs
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螺旋桨设计的数值气动声学分析
DOI：
10.1017/aer.2017.123
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
N. Bown
中科院分区：
文献类型：
--
作者：
G. Chirico;G. Barakos;N. Bown
摘要由于螺旋桨飞机是中短途飞行的最佳选择，但其声发射可能需要改进以符合未来的噪声认证标准，因此本工作旨在对不同现代螺旋桨设计的声学进行数值评估。在代表典型大型涡轮螺旋桨飞机机身外部的表面上，比较了不同叶片几何形状和轮毂结构的总体声压级和噪声频谱。还使用福克50飞机的传递函数对舱内噪声进行了评估。叶片设计在较低转速下运行，跨距向载荷向船内移动，显示出明显的安静，而不会造成严重的性能损失。所采用的计算流体动力学(CFD)方法能够再现所有叶片的音调内容及其对轮毂和叶片设计特征的依赖。
ABSTRACT As propeller-driven aircraft are the best choice for short/middle-haul flights but their acoustic emissions may require improvements to comply with future noise certification standards, this work aims to numerically evaluate the acoustics of different modern propeller designs. Overall sound pressure level and noise spectra of various blade geometries and hub configurations are compared on a surface representing the exterior fuselage of a typical large turboprop aircraft. Interior cabin noise is also evaluated using the transfer function of a Fokker 50 aircraft. A blade design operating at lower RPM and with the span-wise loading moved inboard is shown to be significantly quieter without severe performance penalties. The employed Computational Fluid Dynamics (CFD) method is able to reproduce the tonal content of all blades and its dependence on hub and blade design features.