Flow structure on a three-dimensional wing subjected to small amplitude perturbations
Flow structure on a three-dimensional wing subjected to small amplitude perturbations
复制标题
受到小幅度扰动的三维机翼上的流动结构
DOI：
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
D. Rockwell
中科院分区：
文献类型：
--
作者：
T. Yilmaz;D. Rockwell
半度量级的小幅度角扰动可以极大地改变沿三维机翼结构的流动结构，这是使用高图像密度粒子图像测速技术定量表征的。在固定翼分离剪切层展向平均失稳频率的基频或一次谐波处的激励几乎消除了大攻角下沿机翼的大规模分离区。流动的物理性质是根据时间平均流线、涡度和雷诺应力，以及瞬时涡度的相位平均模式来解释的。当时间平均分离区最小时，沿前缘出现独特的涡度模式。
Small amplitude angular perturbations, of the order of one-half degree, can substantially modify the flow structure along a three-dimensional wing configuration, which is quantitatively characterized using a technique of high-image-density particle image velocimetry. Excitation at either the fundamental or the first subharmonic of the spanwise-averaged instability frequency of the separating shear layer from the stationary wing nearly eliminates the large-scale separation zone along the wing at high angle of attack. The physics of the flow is interpreted in terms of time-mean streamlines, vorticity and Reynolds stress, in conjunction with phase-averaged patterns of instantaneous vorticity. Distinctive vorticity patterns occur along the leading edge when the time-averaged separation zone is minimized.
振荡低展弦比机翼的流动重新附着和涡流重组
影响因子：
2.5
作者：
Vardaki E
通讯作者：
Vardaki E