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首页> 外文期刊>Journal of aerospace engineering >Parametric Analysis of a Large-Scale Cycloidal Rotor in Hovering Conditions
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Parametric Analysis of a Large-Scale Cycloidal Rotor in Hovering Conditions

机译：悬停条件下大型摆线转子的参数分析

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摘要

In this work, four key design parameters of cycloidal rotors, namely the airfoil section, number of blades, chord-to-radius ratio, and pitching axis location, are addressed. The four parameters, which have a strong effect on rotor aerodynamic efficiency, are analyzed with an analytical model and a numerical approach. The numerical method, which is based on a finite-volume discretization of two-dimensional unsteady Reynolds averaged Navier-Stokes equations on a multiple sliding mesh, is proposed and validated against experimental data. A parametric analysis is then carried out considering a large-scale cyclogyro, suitable for payloads above 100 kg, in hovering conditions. Results demonstrate that the airfoil thickness significantly affects the rotor performance; such a result is partly in contrast with previous findings for small-scale and microscale configurations. Moreover, it will be shown that increasing the number of blades could result in a decrease of the rotor efficiency. The effect of chord-to-radius will demonstrate that values of around 0.5 result in higher efficiency. Finally it is found out that for these large systems, in contrast with microscale cyclogyros, the generated thrust increases as the pitching axis is located away from the leading edge, up to 35% of chord length. Furthermore, the shortcomings of using simplified analytical tools in the prediction of thrust and power in nonideal flow conditions are discussed. (C) 2016 American Society of Civil Engineers.
机译：在这项工作中，摆线摆线转子的四个关键设计参数，即翼型截面，叶片数量，弦半径比和俯仰轴位置均得到解决。通过分析模型和数值方法分析了对转子空气动力效率有很大影响的四个参数。提出了一种基于多滑动网格上二维非定常雷诺平均Navier-Stokes方程的有限体积离散化的数值方法，并针对实验数据进行了验证。然后，在悬停条件下，考虑适用于100 kg以上有效载荷的大型摆陀螺仪进行参数分析。结果表明，翼型厚度显着影响转子性能。这样的结果与先前在小规模和微型配置方面的发现形成了鲜明的对比。而且，将显示出增加叶片的数量可能导致转子效率的降低。和弦到半径的影响将表明，大约0.5的值会导致更高的效率。最终发现，对于这些大型系统，与微型旋翼陀螺相比，当俯仰轴远离前缘定位时，产生的推力会增加，最高可达弦长的35％。此外，还讨论了在非理想流动条件下使用简化分析工具预测推力和功率的缺点。 （C）2016年美国土木工程师学会。

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  • 来源
    《Journal of aerospace engineering》 |2017年第1期|04016066.1-04016066.14|共14页
  • 作者

    Xisto Carlos M.; Leger J. A.; Pascoa J. C.; Gagnon L.; Masarati P.; Angeli D.; Dumas A.;

  • 作者单位

    Chalmers, Div Fluid Dynam, Dept Appl Mech, S-41296 Gothenburg, Sweden;

    Univ Beira Interior, Ctr Mech & Aerosp Sci & Technol, Res Unit 151, Dept Engn Electromecan, P-6201001 Covilha, Portugal;

    Univ Beira Interior, Ctr Mech & Aerosp Sci & Technol, Res Unit 151, Dept Engn Electromecan, P-6201001 Covilha, Portugal;

    Politecn Milan, Dip Sci & Tecnol Aerosp, I-20156 Milan, Italy;

    Politecn Milan, Dip Sci & Tecnol Aerosp, I-20156 Milan, Italy;

    Univ Modena & Reggio Emilia, Dip Sci & Metodi Ingn, I-42122 Reggio Emilia, Italy;

    Univ Modena & Reggio Emilia, Dip Sci & Metodi Ingn, I-42122 Reggio Emilia, Italy;

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  • 正文语种 eng
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  • 关键词

    Cycloidal rotor; Cyclogyro; Computational fluid dynamics; Parametric study; Analytical aerodynamics;

    机译：摆线转子;摆线陀螺;计算流体力学;参数研究;分析空气动力学;

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