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首页> 外文会议>AHS Specialists Conference on Aeromechanics Design for Transformative Vertical Flight >Effect of Blade Number and Solidity on Rotor Hover Performance
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Effect of Blade Number and Solidity on Rotor Hover Performance

机译：刀片数和固识对转子悬停性能的影响

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Solidity plays an important role in rotor hover performance. Different rotors are typically compared in terms of the blade loading coefficient (thrust coefficient divided by solidity) and power loading coefficient (power or torque coefficient divided by solidity). This is analogous to fixed-wing where the wing efficiency is measured in terms of the mean lift to drag ratio, and allows comparison of different rotors operating at nominally the same average lift coefficient. It has even been suggested that based on blade element momentum theory, the blade number does not have any effect on performance while comparing rotors with the same solidity. Recent interest in proprotor performance has brought to focus some experimental results that appear to support this hypothesis. However, some of the authors' prior work showed that the blade number has a primary influence on the induced power in hover rather than the solidity. Blade aspect ratio, the other constituent in solidity, was shown to have a much smaller and secondary influence. This paper examines these results using simple analysis tools in an effort to better understand the seemingly anomalous behavior. This is complemented by an unique experimental undertaking involving hover performance measurements for several rotor configurations with two to six blades. These experiments should provide a large enough data base to provide further insights into the effects of blade number and solidity on hover performance.
机译：固体在转子悬停性能中起着重要作用。通常在叶片加载系数（推力系数除以稳定度）和功率负载系数（通过稳定性除以稳定性的电力或扭矩系数）而比较的不同转子。这类似于固定翼，其中机翼效率在平均升力到拖动比率方面测量，并且允许在名义上相同的平均升力系数进行不同的转子。它甚至建议基于叶片元件动量理论，刀片号没有对性能的任何影响，同时比较具有相同坚固性的转子。近期对普罗博尔表现的兴趣已经介绍了一些似乎支持这一假设的实验结果。然而，一些作者的事先工作表明，刀片数对悬停的血液诱导功率而不是坚固性的主要影响。叶片纵横比，其它稳定性的组分被证明具有更小和次要的影响。本文使用简单的分析工具检查这些结果，以更好地了解看似异常的行为。这是由独特的实验承诺补充，涉及悬停性能测量的几个转子配置，两到六片叶片。这些实验应提供足够大的数据库，以提供进一步的见解，进一步了解刀片数量和悬停性能的效果。

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