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首页> 外文期刊>Journal of Aircraft >Design and Analysis of a Droop Nose for Coanda Flap Applications
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Design and Analysis of a Droop Nose for Coanda Flap Applications

机译:柯安达襟翼应用下垂鼻子的设计与分析

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摘要

The present study describes the fundamentals of droop nose design for improving the aerodynamics of airfoils with active high-lift using an internally blown Coanda-type flap. The main objectives are to increase the stall angle of attack and reduce the power required by the high-lift system. A two-dimensional sensitivity analysis explores the effects of varying airfoil camber and thickness in the first 20% of the chord. The resulting droop nose configuration improves the maximum lift coefficient by about 20% and increases the stall angle of attack by around 10-15 deg. A target lift coefficient of about 4.7 is reached with 28% less jet momentum coefficient, compared to the clean nose. As the modified leading-edge geometry presents different stall mechanisms, the aerodynamic response to variations of jet momentum is also different. In particular, for a jet momentum coefficient above 0.035, the stall angle of attack increases with jet momentum, in contrast with the behavior observed with the clean nose.
机译:本研究描述了使用内部吹制的柯恩达型襟翼主动下垂以改善机翼空气动力学的下垂机头设计的基本原理。主要目标是增加失速迎角并减少高举系统所需的动力。二维灵敏度分析探讨了在弦的前20%中变化的翼型弯度和厚度的影响。产生的下垂鼻形将最大升力系数提高了约20%,并使堵转攻角增加了约10-15度。与干净的机头相比,达到了约4.7的目标升力系数,而喷气动量系数却减少了28%。由于改进的前沿几何形状呈现出不同的失速机理,因此对喷气动量变化的空气动力学响应也不同。尤其是,对于高于0.035的喷射动量系数,与通过清洁机头观察到的行为相反,堵转角随喷射动量而增加。

著录项

  • 来源
    《Journal of Aircraft》 |2014年第5期|1567-1579|共13页
  • 作者

    Bumazzi Marco; Radespiel Rolf;

  • 作者单位

    Tech Univ Carolo Wilhelmina Braunschweig, Inst Fluid Mech, D-38108 Braunschweig, Germany;

    Tech Univ Carolo Wilhelmina Braunschweig, Inst Fluid Mech, D-38108 Braunschweig, Germany;

  • 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
  • 关键词

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