On the Mechanism of Lateral Asymmetry of Noise Radiation from a Propeller Installed Near a Wing

IF 0.9 4区物理与天体物理 Q4 ACOUSTICS

Acoustical Physics Pub Date : 2025-01-24 DOI:10.1134/S1063771024601729

V. F. Kopiev, N. N. Ostrikov, G. A. Faranosov, V. A. Titarev, S. L. Denisov, R. V. Akinshin

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Abstract

The effect of lateral asymmetry in the radiation pattern of a propeller installed near a wing is studied. Using a simplified theoretical model of propeller loading noise and its shielding by a half-plane, as well as numerical modeling of the interaction of the propeller with a flat finite plate, it is shown that when the propeller and the scattering surface are close to each other, significant lateral asymmetry of propeller tonal noise radiation in the far field occurs. The mechanism underlying this effect, which accompanies the symmetrical noise directivity of the propeller itself and the symmetry of the scatterer (wing), is associated with the phased summation of the sound field radiated directly by the propeller and the secondary sound field generated on the surface of the wing due to scattering of perturbations (mainly hydrodynamic) created by the propeller on the leading edge of the wing. Thus, the study demonstrated that the presence of lateral asymmetry in the noise radiation pattern inherent in propeller aircraft is a consequence of the interaction between propellers and closely spaced wings.

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近翼螺旋桨噪声辐射横向不对称机理研究

研究了侧向不对称对机翼附近螺旋桨辐射方向图的影响。利用简化的螺旋桨加载噪声及其半平面屏蔽理论模型，以及螺旋桨与平面有限板相互作用的数值模拟表明，当螺旋桨与散射面距离较近时，远场的螺旋桨调性噪声辐射存在明显的横向不对称性。这种影响的机制，伴随着螺旋桨本身的对称噪声指向性和散射体（机翼）的对称性，与螺旋桨直接辐射的声场和由于螺旋桨在机翼前缘产生的扰动（主要是水动力）散射而在机翼表面产生的二次声场的相位总和有关。因此，该研究表明，螺旋桨飞机固有的横向不对称噪声辐射模式是螺旋桨和紧密间隔机翼之间相互作用的结果。

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来源期刊

Acoustical Physics 物理-声学

CiteScore

1.60

自引率

50.00%

发文量

审稿时长

3.5 months

期刊介绍： Acoustical Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It covers theoretical and experimental aspects of basic and applied acoustics: classical problems of linear acoustics and wave theory; nonlinear acoustics; physical acoustics; ocean acoustics and hydroacoustics; atmospheric and aeroacoustics; acoustics of structurally inhomogeneous solids; geological acoustics; acoustical ecology, noise and vibration; chamber acoustics, musical acoustics; acoustic signals processing, computer simulations; acoustics of living systems, biomedical acoustics; physical principles of engineering acoustics. The journal publishes critical reviews, original articles, short communications, and letters to the editor. It covers theoretical and experimental aspects of basic and applied acoustics. The journal welcomes manuscripts from all countries in the English or Russian language.