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Design and analysis of multi-section variable camber wing.

机译:多段可变外倾翼的设计与分析。

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摘要

Minimizing fuel consumption is one of the major concerns in the aviation industry. In the past decade, there have been many attempts to improve the fuel efficiency of aircraft. One of the methods proposed is to vary the lift-to-drag ratio of the aircraft in different flight conditions. To achieve this, the wing of the airplane must be able to change its configuration during flight, corresponding to different flight regimes.; In the research presented in this thesis, the aerodynamic characteristics of a multi-section, variable camber wing were investigated. The model used in this research had a 1-ft chord and a 1-ft wingspan, with the ribs divided into 6 sections. Each section was able to rotate approximately 5 degrees without causing significant discontinuity on the wing surface. Two pneumatic actuators located at the main spar were used to morph the wing through mechanical linkages. The multi-section variable camber wing model could provide up to 10 percent change in camber from the baseline configuration, which had a NACA0012 section.; The wing was tested in the free jet wind tunnel at three different Reynolds numbers: 322000, 48000, and 636000. Static tests were performed to obtain lift and drag data for different configurations. Two rigid wings in baseline and camber configuration were built and tested to compare the test data with variable camber wing. The wind tunnel test results indicated that the multi-section variable camber wing provided a higher lift than the rigid wing in both configurations whereas high drag was also generated on the variable camber wing due to friction drag on the wing skin. The larger drag value appeared on variable camber wing in baseline configuration than in cambered configuration resulting in lower lift-to-drag ratio as compared to the baseline rigid wing whereas the variable camber wing in cambered configuration had higher lift-to-drag ratio than the cambered rigid wing.
机译:最小化燃油消耗是航空业的主要关注之一。在过去的十年中,已经进行了许多尝试来提高飞机的燃油效率。建议的方法之一是在不同的飞行条件下改变飞机的升/降比。为此,飞机机翼必须能够在飞行期间根据不同的飞行状态改变其配置。在本文提出的研究中,研究了多截面可变弯度机翼的空气动力特性。本研究中使用的模型的弦长为1英尺,翼展为1英尺,肋骨分为6个部分。每个部分能够旋转大约5度,而不会在机翼表面造成明显的不连续性。位于主翼梁上的两个气动执行器用于通过机械连杆使机翼变形。多截面可变弯度机翼模型相对于具有NACA0012截面的基准配置,可以提供高达10%的弯度变化。机翼在自由喷气风洞中以三种不同的雷诺数进行了测试:322000、48000和636000。进行了静态测试,以获取不同配置的升力和阻力数据。建造并测试了两个具有基准和外倾构型的刚性机翼,以将测试数据与可变外倾翼进行比较。风洞测试结果表明,在两种配置中,多段式可变弯度机翼均提供了比刚性机翼更高的升力,而可变弯度机翼也由于机翼蒙皮上的摩擦阻力而产生了高阻力。与基线刚性机翼相比,在基线配置下可变弯度机翼上出现的阻力值比在弧形配置下更大,导致升力/阻力比降低,而在弧形配置下的可变弯度机翼的升力/阻力比值高。弧形刚性机翼。

著录项

  • 作者

    Poonsong, Prasobchok.;

  • 作者单位

    University of Maryland, College Park.;

  • 授予单位 University of Maryland, College Park.;
  • 学科 Engineering Aerospace.
  • 学位 M.S.
  • 年度 2004
  • 页码 97 p.
  • 总页数 97
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空、航天技术的研究与探索;
  • 关键词

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