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首页> 外文期刊>Aerospace science and technology >Investigation of winglet on the transonic flutter characteristics for a wind tunnel test model CHNT-1
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Investigation of winglet on the transonic flutter characteristics for a wind tunnel test model CHNT-1

机译：基于CHNT-1风洞试验模型的小翼对跨音速颤振特性的研究

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摘要

Winglet is of much practical importance in the aerodynamics of a wing with key features to vibrational modes. To study the influences of both geometry and weight of winglets on flutter characteristics, a semi span version of a supercritical wing for a transport airplane was designed. The flutter model was tested cantilever mounted to a rigid fuselage in the China Aerodynamics Research and Development Center with a series of winglets ballasted. The transonic flutter speed boundary for the wing with a basic winglet was measured at Mach number ranging from 0.6 to 0.89, with a minimum flutter speed near M = 0.85. Influences of both winglet geometry and winglet mass properties were acquired at M = 0.7. The winglet weight was observed to reduce the critical dynamic pressure while the wingtip shape has little influence. The winglet effect with a mass effect rather that an aerodynamic effect on flutter has been verified. Furthermore, a linear function was proposed to quantify the effect of weight on the critical dynamic pressure, and the wingtip mass ballast decreased the q(F) by 0.125 KPa per gram. (C) 2019 Elsevier Masson SAS. All rights reserved.
机译：小翼在机翼的空气动力学中具有非常重要的实践意义，它具有振动模式的关键特征。为了研究小翼的几何形状和重量对颤振特性的影响，设计了用于运输飞机的超临界机翼的半跨度版本。颤振模型在中国空气动力学研究与发展中心通过悬臂安装到刚性机身上进行了测试，并装有一系列带小翼的小翼。具有基本小翼的机翼的跨音速扑动速度边界是在0.6至0.89的马赫数范围内测量的，最小扑动速度接近M = 0.85。小翼几何形状和小翼质量特性的影响均在M = 0.7时获得。观察到小翼重量减小了临界动压力，而翼尖形状几乎没有影响。已经验证了具有质量效应的小翼效应，而不是扑扑的空气动力学效应。此外，提出了一个线性函数来量化重量对临界动压力的影响，而翼尖质量压舱使q（F）降低了0.125 KPa / g。 （C）2019 Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2019年第3期|430-437|共8页
  • 作者

    Lv Binbin; Lu Zhiliang; Guo Tongqing; Tang Di; Yu Li; Guo Hongtao;

  • 作者单位

    Nanjing Univ Aeronaut & Astronaut, Coll Aerosp Engn, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Aerosp Engn, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Aerosp Engn, Nanjing 210016, Jiangsu, Peoples R China;

    Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China;

    China Aerodynam Res & Dev Ctr, High Speed Aerodynam Inst, Mianyang 621000, Peoples R China;

    China Aerodynam Res & Dev Ctr, High Speed Aerodynam Inst, Mianyang 621000, Peoples R China;

  • 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

    Winglet effect; Transonic flutter; Wind tunnel test; Critical dynamic pressure; Linear fitting;

    机译：小翼效应;跨音速颤动;风洞试验;临界动压力;线性拟合;

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