直升机空气动力学计算研究

Annals Series on engineering sciences Academy of Romanian Scientists Pub Date : 2023-01-01 DOI:10.56082/annalsarscieng.2023.1.54

M. Ilie, A. Semenescu

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引用次数: 0

摘要

本文主要研究直升机的空气动力学和叶片涡相互作用现象。采用大涡模拟方法对雷诺数Re=1.3x106的亚音速不可压缩流动进行了计算研究。直升机的空气动力学是由叶片-涡相互作用(BVI)现象控制的，这种现象造成了噪声和振动。直升机在飞行过程中形成尖涡长丝，并与前进桨叶相互作用，形成桨涡相互作用现象。研究表明，叶片-涡相互作用会引起气动系数的振荡。由于湍流现象，振荡表现出非线性行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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COMPUTATIONAL STUDIES OF HELICOPTER AERODYNAMICS

The present research concerns the helicopter aerodynamics and the blade-vortex interaction phenomenon. The computational studies are carried out using the large-eddy simulation approach for subsonic incompressible flow of Reynolds number Re=1.3x106. The helicopter aerodynamics is dominated by the blade-vortex interaction (BVI) phenomenon which is responsible for noise and vibrations. During the helicopter flight, a tip-vortex filament is formed and its interaction with the advancing blade causes the blade-vortex interaction phenomenon. The study shows that the blade-vortex interaction causes oscillations of the aerodynamic coefficients. Due to the turbulence phenomenon, the oscillations exhibit a non-linear behaviour.

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来源期刊

Annals Series on engineering sciences Academy of Romanian Scientists

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审稿时长

12 weeks