The Vortical Structures in the Rear Separation and Wake Produced by a Supersonic Micro-Ramp

Wang, X., Yan, Y., Sun, Z. & Liu, C. (2014). The Vortical Structures in the Rear Separation and Wake Produced by a Supersonic Micro-Ramp. Flow, Turbulence and Combustion, 93(1), pp. 25-36. doi: 10.1007/s10494-014-9531-y

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Abstract

The vortical structures in the rear separation and wake region produced by a micro-ramp that immersed in a supersonic turbulent boundary layer are investigated. The small scale separation close to the trailing edge was reveled and this confirms the previous experimental observation. Between the reverse region and surrounding fast moving flow, a three-dimensional shear layer was formed, and vortices are generated. By using vortex line method, the spiral points were understood as the cross-sections of the Ω-shaped vortices that follow the shape of the separation. The vortical structure was analogous to that in the wake region, where similar Ω-shaped vortex can be observed which follows the deficit region caused by the micro-ramp. Finally, the revealed flow topology was conceived beneficial to studying the wall bounded turbulence which involves similar vortical structures but in a smaller scale, while the vortical pattern in the current micro-ramp wake is larger.

Item Type: Article
Additional Information: The final publication is available at Springer via http://dx.doi.org/10.1007/s10494-014-9531-y
Uncontrolled Keywords: MVG, Shock boundary layer interaction, Separation, Vortex, Wake
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: School of Engineering & Mathematical Sciences > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/7376

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