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首页> 外文会议>American Helicopter Society aeromechanics specialists meeting (Aeromechanics 2000) >On the Formation of a Rotor Tip-Vortex
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On the Formation of a Rotor Tip-Vortex

机译：关于转子顶涡的形成

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Despite the fact that a large amount of compu-rntational and experimental work on the rotor wakernhas been published, little of a quantitative nature isrnknown about the origin of the main component of thernrotor wake, the tip-vortex, as a function of the rotorrnspeed, rotor blade geometry, and angle of attack. Thernobjective of this paper is to is to describe the originrnof the tip vortex and calculate important propertiesrnsuch as core radius and circulation as a function of thernabove parameters. It is surprising that experimen-rntal data by several workers has revealed little depen-rndence on the Reynolds number. Of course, this lackrnof dependence on Reynolds number will hold only ifrnthe row remains substantially unseparated, thoughrnit may be noted that drag coeu000ecients of blau000b bodiesrnare remarkably constant over wide range of Reynoldsrnnumber. The rotor blade is assumed to be of largernaspect ratio and to leading order in the blade aspectrnratio, it appears infnite in length. In this case, thernbound circulation has an analytical solution when thernblade is viewed as a lifting-line. Lifting surface resultsrnhave been obtained and compare well with the liftingrnline results for the bound circulation.
机译：尽管已经发表了大量关于转子尾流的计算和实验工作，但人们对转子尾流的主要成分尖端涡的起源与转子速度的函数的定量性质知之甚少，转子叶片的几何形状和迎角。本文的目的是描述尖端涡旋的起源，并根据上述参数计算出重要的特性，例如核心半径和环流。令人惊讶的是，几名工人的实验数据显示，雷诺数几乎没有依赖性。当然，只有当行基本上没有分开时，这种对雷诺数的依赖才会成立，尽管可以注意到，在宽范围的雷诺数范围内，blau000b体的阻力系数是相当恒定的。假定转子叶片具有较大的宽高比，并且在叶片纵横比方面处于领先地位，它的长度似乎是有限的。在这种情况下，当将Therblade视为起重线时，Thernbound循环具有解析解。已经获得了提升面的结果，并将其与边界循环的提升线结果进行了很好的比较。

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