Reynolds number influence on the formation of vortical structures on a pitching flat plate
Reynolds number influence on the formation of vortical structures on a pitching flat plate
复制标题
雷诺数对俯仰平板上旋涡结构形成的影响
DOI：
10.1098/rsfs.2016.0079
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发表时间：
2017
期刊：
影响因子：
4.4
通讯作者：
Tropea
中科院分区：
文献类型：
--
作者：
Widmann;Tropea
研究了基于弦数的雷诺数对非定常俯仰平板前缘涡形成的影响。论述了二次流结构对供给LEV的剪切层的影响，以及由于粘性过程而导致的前缘拓扑变化。采用粒子图像测速法在两个视场中同时测量时间分辨速度场，将局部和全局流动现象联系起来，以识别非定常边界层分离和随后的流动结构。最后，将雷诺数确定为一个参数，该参数决定了涡壁相互作用中边界层的粘性响应，从而导致LEV从翼型脱离。
The impact of chord-based Reynolds number on the formation of leading-edge vortices (LEVs) on unsteady pitching flat plates is investigated. The influence of secondary flow structures on the shear layer feeding the LEV and the subsequent topological change at the leading edge as the result of viscous processes are demonstrated. Time-resolved velocity fields are measured using particle image velocimetry simultaneously in two fields of view to correlate local and global flow phenomena in order to identify unsteady boundary-layer separation and the subsequent flow structures. Finally, the Reynolds number is identified as a parameter that is responsible for the transition in mechanisms leading to LEV detachment from an aerofoil, as it determines the viscous response of the boundary layer in the vortex–wall interaction.
影响因子：
2.4
作者：
Rival, David E.;Kriegseis, Jochen;Tropea, Cameron
通讯作者：
Tropea, Cameron