Comparison of the Noise Directivity Pattern of the Main Rotor of a Helicopter for Flight and Hover Modes

Vorontsov V. I.; Faranosov G. A.; Karabasov S. A.; Zaitsev M. Yu.

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Comparison of the Noise Directivity Pattern of the Main Rotor of a Helicopter for Flight and Hover Modes

机译：飞行器直升机主转子噪声指向性模式的比较和悬停模式

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The noise of the main rotor of a helicopter in hover and horizontal flight modes is numerically simulated. To calculate the acoustic characteristics caused by the nonstationary load on the blades, a software package is used, validated with experimental data in hover mode. A hybrid calculation method is used, according to which the near field is calculated first, followed by the acoustic characteristics in the far field. In the near field, the values of the field parameters near the rotating blade are found by direct solution of the unsteady Euler equations in a noninertial coordinate system. To calculate the far field, the integral Ffowcs Williams-Hawkings method is applied using permeable control surfaces enclosing the blade.

机译：在数值模拟悬停和水平飞行模式中直升机的主转子的噪声。为了计算由刀片上的非间断负载引起的声学特性，使用软件包，验证了在悬停模式下的实验数据。使用混合计算方法，根据该方法，首先计算近场，然后在远场中的声学特性。在近场中，通过在非线性坐标系中的不稳定欧拉方程的直接解决方案来发现旋转刀片附近的场参数的值。为了计算远场，使用封闭刀片的可渗透控制表面来施加积分FFOWCS-Hawkings方法。

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来源
《Acoustical physics》 |2020年第3期|共10页
作者
Vorontsov V. I.; Faranosov G. A.; Karabasov S. A.; Zaitsev M. Yu.;
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作者单位

Moscow Res Complex Cent Aerohydrodam Inst TsAGI Moscow 105005 Russia;

Moscow Res Complex Cent Aerohydrodam Inst TsAGI Moscow 105005 Russia;

Moscow Res Complex Cent Aerohydrodam Inst TsAGI Moscow 105005 Russia;

Moscow Res Complex Cent Aerohydrodam Inst TsAGI Moscow 105005 Russia;

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原文格式 PDF
正文语种 eng
中图分类声学;
关键词
helicopter rotor noise; FWH surface; far field acoustic measurements;

机译：直升机转子噪声;FWH表面;远场声学测量;

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专利

1. Comparison of the Noise Directivity Pattern of the Main Rotor of a Helicopter for Flight and Hover Modes [J] . Vorontsov V. I., Faranosov G. A., Karabasov S. A., Acoustical physics . 2020,第3期

机译：飞行器直升机主转子噪声指向性模式的比较和悬停模式
2. Influence of the Air Viscosity on the Induced Power of a Helicopter Main Rotor in Hover and Vertical Takeoff Modes [J] . V. I. Shaidakov, V. S. Brusov Russian Aeronautics . 2017,第4期

机译：空气粘度对悬停和垂直起飞模式直升机主转子诱导力的影响
3. CAA modeling of helicopter main rotor in hover [J] . Alexander N. Kusyumov, Sergey A. Mikhailov, Andrey S. Batrakov, EPJ Web of Conferences . 2017,第12期

机译：悬停直升机主旋翼的CAA建模
4. An experimental determination of the effect of blade design parameters on tonal and broadband noise of model helicopter main rotor in hover [C] . V.F. Kopiev, M.Yu. Zaytsev, V.A. Anikin, European Rotorcraft Forum . 2016

机译：叶片设计参数对悬停模型直升机主旋翼音调和宽带噪声影响的实验确定
5. UNSTEADY AERODYNAMICS IN TIME AND FREQUENCY DOMAINS FOR FINITE-TIME ARBITRARY MOTION OF HELICOPTER ROTOR BLADES IN HOVER AND FORWARD FLIGHT (AEROELASTICITY, NONLINEAR PERIODIC SYSTEMS, CASCADE AERO, MODELING, RATIONAL APPROXIMATIONS). [D] . ASGHAR-HESSARI-DINYAVARI, MEHRAN. 1985

机译：悬停和向前飞行中直升机转子叶片有限时任意运动的时间和频率域非定常气动特性（气动弹性，非线性周期系统，级联气动，建模，有理近似）。
6. The Effects of Crosswind Flight on Rotor Harmonic Noise Radiation [O] . Eric Greenwood, Ben W. Sim -1

机译：侧风飞行对转子谐波噪声辐射的影响
7. Numerical Analysis of an Isolated Main Helicopter Rotor in Hovering and Forward Flight [O] . Nik Mohdi Nik Ahmad Ridhwan, Ab. Wahabii Abas 2006

机译：惯性主直升机旋翼盘旋和前向飞行的数值分析
8. Flight tests of the Sikorsky HNS-1 (Army YR-4B) helicopter II : hovering and vertical-flight performance with the original and an alternate set of main-rotor blades, including a comparison with hovering performance theory [R] . Gessow, Alfred 1945

机译：西科斯基HNs-1（陆军YR-4B）直升机II的飞行试验：使用原始和另一组主转子叶片的悬停和垂直飞行性能，包括与悬停性能理论的比较

Comparison of the Noise Directivity Pattern of the Main Rotor of a Helicopter for Flight and Hover Modes

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