多旋翼无人机旋翼-支杆相互作用噪声

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-09-13 DOI:10.1016/j.apacoust.2025.111054

Ruixuan He , Michael J. Kingan , Xinjing Wang , Xianghao Kong , Huachen Zhu

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引用次数: 0

摘要

提出了一种预测转子-支杆相互作用噪声的频域方法。该方法利用频域格林函数将各谐波直接与转子/支杆表面的非定常加载谐波联系起来。该公式表明，转子调性噪声的各谐波由转子加载各谐波的贡献组成，而杆系调性噪声的各谐波仅由相应的杆系加载谐波产生。采用计算流体力学（CFD）方法对实际多旋翼无人机旋翼-支杆系统的非定常载荷进行了预测。该加载用作频域方法的输入，并将结果与实验测量结果进行比较，在大多数观察者位置显示在3db以内的合理一致性。结果表明，转子-支板相互作用产生声压脉冲，随着转子-支板间距的增大，声压脉冲减弱。此外，加载源辐射到支板上的噪声随方位角变化显著。使用非定常CFD模拟来预测非定常载荷是耗时且不适合设计过程应用的。为此，建立了一种快速估计非定常载荷的解析模型。将分析模型应用于实际的转子-支杆系统，并采用频域法计算噪声辐射。结果表明，数值模拟和实验结果与预测结果吻合较好（总声压级在3db以内）。

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Multi-Rotor unmanned aerial vehicle Rotor-Strut interaction tonal noise

A frequency domain method is presented to predict rotor-strut interaction tonal noise. The method directly relates each harmonic of tonal noise to the unsteady loading harmonics on the rotor/strut surfaces using the frequency-domain Green’s function. The formulation shows that each harmonic of rotor tonal noise is composed of contributions from all harmonics of rotor loading, whereas each harmonic of strut tonal noise is produced exclusively by the corresponding harmonic of strut loading. Computational Fluid Dynamics (CFD) simulations are used to predict the unsteady loading on a practical multi-rotor unmanned aerial vehicle (UAV) rotor-strut system. This loading is used as input to the frequency-domain method and the results are compared with experimental measurements, showing reasonable agreement to within 3 dB at most observer positions. It is observed that the rotor-strut interaction generates an acoustic pressure impulse, which is weakened as the rotor-strut spacing increases. Additionally, the noise radiated from the loading sources on the struts is found to vary significantly with azimuthal angle. Using unsteady CFD simulations to predict the unsteady loading is time-consuming and ill-suited for design process applications. Therefore, an analytical model is developed to quickly estimate this unsteady loading. The analytical model is applied to a practical rotor-strut system, and the resulting noise radiation is calculated using the frequency-domain method. The predictions are found to be in reasonable agreement (overall sound pressure level within 3 dB) with the numerical simulations and experimental measurements.

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.