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Tip Vortex Dependence with Angle of Attack

机译:尖端涡旋相关性与迎角

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摘要

An analysis that explains the dependence of the tip vortex characteristics and their variation with angle of attack and downstream distance, under certain conditions, has been detailed. First, the low wing loading analysis of Moore and Safrman is used as the asymptotic far-field regime. Dimensional analysis presents reasoning for a hypothetical near field. A balance of these two scaling laws is made and is shown to apply in an intermediate-field regime. In the intermediate field, various vortex characteristics are shown to vary as a logarithmic variation with angle of attack. The expressions obtained are shown to hold for some peak tangential velocity data. An expression coupling the circulation and the core radius is obtained. This is used to obtain an expression for the axial velocity; under the assumption of constant total pressure losses over a range of angle of attack, the expression obtained is shown to be in agreement with some experimental data.
机译:在特定条件下,已经进行了详细的分析,解释了尖端涡旋特性及其随攻角和下游距离的变化的相关性。首先,将Moore和Safrman的低翼载荷分析用作渐近远场状态。维度分析提供了假设的近场的推理。在这两个定标律之间取得了平衡,并显示出它们适用于中间场体制。在中间场中,各种涡旋特性显示为随迎角的对数变化而变化。显示获得的表达式对于某些峰值切向速度数据成立。获得了将循环与芯半径耦合的表达式。这用于获得轴向速度的表达式;在一定的攻角范围内,总压力损失恒定的情况下,得出的表达式与一些实验数据相符。

著录项

  • 来源
    《Journal of Aircraft》 |2006年第5期|p.1582-1585|共4页
  • 作者单位

    Concordia University, Montreal, Quebec H3G 1M8, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空;
  • 关键词

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