2013
DOI: 10.1088/1674-1056/22/11/114703
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Imaging of supersonic flow over a double elliptic surface

Abstract: The coherent structures of flow over a double elliptic surface are experimentally investigated in a supersonic lownoise wind tunnel at Mach number 3 using nano-tracer planar laser scattering (NPLS) and particle image velocimetry (PIV) techniques. High spatiotemporal resolution images and velocity fields of both laminar and turbulent inflows over the test model are captured. Based on the time-correlation images, the spatial and temporal evolutionary characteristics of the coherent structures are investigated. T… Show more

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Cited by 2 publications
(2 citation statements)
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“…Near-wall quasi-stream-wise vortices play a key role in producing high friction in the wall-bounded turbulent flow. [1][2][3][4][5][6][7][8] Aiming at skin-friction reduction and turbulence suppression, the opposition control was proposed by Choi et al [9] in their direct numerical simulation (DNS) for the first time. [10][11][12][13][14][15] However, it is impractical since the required velocity information very near the wall is usually unavailable.…”
Section: Introductionmentioning
confidence: 99%
“…Near-wall quasi-stream-wise vortices play a key role in producing high friction in the wall-bounded turbulent flow. [1][2][3][4][5][6][7][8] Aiming at skin-friction reduction and turbulence suppression, the opposition control was proposed by Choi et al [9] in their direct numerical simulation (DNS) for the first time. [10][11][12][13][14][15] However, it is impractical since the required velocity information very near the wall is usually unavailable.…”
Section: Introductionmentioning
confidence: 99%
“…NPLS is a novel non-contacted flow visualization technique invented by Yi and Zhao. [11] It adopts nanoparticles -TiO 2 , with aver-age diameter less than 45 nm -as tracer particles to accurately track high-speed flows, and has been applied to supersonic mixing layer, [11] supersonic flow over a forward-facing step, [12] and over a double elliptic surface, [13] etc.…”
mentioning
confidence: 99%