In-Flight Investigation of Transition Under Turbulent Conditions on a Laminar Wing Glove
In-Flight Investigation of Transition Under Turbulent Conditions on a Laminar Wing Glove
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DOI：
10.2514/1.j052818
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发表时间：
2014-09
期刊：
影响因子：
2.5
通讯作者：
A. Reeh;Michael Weismüller;C. Tropea
中科院分区：
文献类型：
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作者：
A. Reeh;Michael Weismüller;C. Tropea
在一架机动滑翔机上进行的飞行实验，揭示了层流翼段在不同来流条件下的气动过程。测量数据是在装有压力传感器和壁面传声器的层流翼手套上获得的，用于检测过渡和研究边界层的不稳定性。用热线传感器测量来流，包括瞬时攻角和湍流特性。飞行试验是在平静和适度湍流条件下进行的。给出了两种来流工况的特征结果，并分析了差异。给出了实验结果与稳定边界层和线性稳定计算的选择比较。实验中观察到的效应不能完全用准稳态理论来描述。压力分布的非定常变化被认为是改变过渡发展的一个来源。一个c…
Flight experiments carried out with a motorized glider yield insights into the aerodynamic processes acting on a laminar wing section under varying on-coming flow conditions. Measurement data are obtained on a laminar wing glove equipped with pressure transducers and wall microphones to detect transition and investigate the boundary-layer instabilities. The on-coming flow, including the instantaneous angle of attack and the turbulence characteristics, is measured with hot-wire sensors. The flight tests were carried out under calm and moderately turbulent conditions. Characteristic results for both on-coming flow conditions are presented and differences are analyzed. Selected comparisons of the experimental results with steady boundary-layer and linear stability computations are provided. The effects observed in the experiments cannot be described solely by quasi-steady theory. Unsteady changes of the pressure distribution are identified as one source for the modification of the transition development. A c...