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首页> 外文会议>The 3rd international basic research conference on rotorcraft technology: Basic research advance in rotorcraft technology >Effects of Blade Tip Sweep on the Flowfield and Aerodynamic Characteristics of Rotors
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Effects of Blade Tip Sweep on the Flowfield and Aerodynamic Characteristics of Rotors

机译：叶片尖端扫掠对转子流场和空气动力学特性的影响

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摘要

The relationship of the section normal Mach number and equivalent angle of attack between a rotor with swept tip and that with rectangular tip was derived. It was proved that the normal flow on a swept tip is not always less than that on a rectangular tip at forward flight and an azimuthal interval where the normal Mach number on a swept tip is larger than that on a rectangular tip was given. Also, the condition of the swept angle distribution to avoid this situation and a new curvilinear swept tip design to maintain a constant leading edge normal Mach number was proposed. CFD analysis was carried out to simulate the transonic flowfield of a swept tip rotor in both hover and forward flight conditions. Based on the theoretical and numerical results, the effect of blade tip swept on the rotor flowfield characteristics and performance, especially on the shock wave location and strength near the tip were studied.
机译：推导了具有扫掠尖端的转子与具有矩形尖端的转子之间的截面法向马赫数与等效攻角的关系。事实证明，在向前飞行时，扫掠尖端的法向流动并不总是小于矩形尖端的流动，并且给出了扫掠尖端的法向马赫数大于矩形尖端的正常马赫数的方位角间隔。此外，提出了避免这种情况的后掠角分布条件，并提出了一种新的曲线后掠尖端设计，以保持恒定的前沿法向马赫数。进行了CFD分析，以模拟在悬停和向前飞行条件下后掠式旋翼转子的跨音速流场。根据理论和数值结果，研究了叶尖扫掠对转子流场特性和性能的影响，特别是对叶尖附近的冲击波位置和强度的影响。

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  • 来源
  • 会议地点 Nanjing(CN)
  • 作者

    ZHAO Qi-jun; XU Guo-hua; XU Guang;

  • 作者单位

    National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics Nanjing University of Aeronautics and Astronautics Nanjing, Jiangsu, 210016, China;

    National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics Nanjing University of Aeronautics and Astronautics Nanjing, Jiangsu, 210016, China;

    National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics Nanjing University of Aeronautics and Astronautics Nanjing, Jiangsu, 210016, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 V275.1;
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