This paper provides an assessment of current rotor design comparison practices. First, the employed CFD method is validated for a number of rotor designs and is shown to achieve accurate performance predictions in hover and high-speed forward flight. Based on CFD results, a detailed investigation is performed in terms of comparing different rotor designs. The CFD analysis highlighted the need of high fidelity methods due to the subtle aerodynamics involved in advanced planforms. Nevertheless, the paper suggests that the correct basis for comparison in terms of performance metrics must be used to inform decisions about the suitability of the rotor blades designs for specific applications. In particular, when comparing blades of advanced planforms, direct torque and thrust comparisons are better than the commonly used lift to drag ratio and figure of merit.

中文翻译：

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基于高保真 CFD 方法评估当前转子设计比较实践

本文提供了对当前转子设计比较实践的评估。首先，所采用的 CFD 方法已针对多种旋翼设计进行了验证，并被证明可以在悬停和高速前飞中实现准确的性能预测。根据 CFD 结果，在比较不同转子设计方面进行了详细调查。由于高级平面图涉及微妙的空气动力学，CFD 分析强调了对高保真方法的需求。尽管如此，该论文建议，必须使用性能指标方面的正确比较基础来为有关特定应用的转子叶片设计适用性的决策提供信息。特别是在比较高级平面形状的刀片时，