Research at DERA on sub boundary layer vortex generators (SBVGs)

Ashill, P. R.; Fulker, J. L.; Hackett, K.

doi:10.2514/6.2001-887

Cited by 110 publications

(77 citation statements)

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“…Ashill et al [34] performed a separation control experiment where the separation was introduced by placing a bump in the test section. A boundary layer tunnel was used with free stream velocity of 40 m/s and a boundary layer thickness of 40 mm over the bump.…”

Section: Fundamental Separation Controlmentioning

confidence: 99%

Micro Vortex Generators for Boundary Layer Control: Principles and Applications

Sun¹

2015

International Journal of Flow Control

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link AbstractA review is given to the major developments in the boundary layer control by means of micro vortex generator (MVG). The appearance of MVG dates back to about three decades from the present review and this class of device rapidly spreads as an efficient and robust boundary layer control strategy for flows with separation in particular. Substantial successful applications of MVG have been achieved in subsonic flows and its application into supersonic flow is under progressive development, which requires the current status and capability of MVG to be reviewed. The fundamental aspects of MVG are first summarized, including its working principle and various geometries. Understanding of the fluid mechanics involved in the wake of a MVG device is of uppermost importance: the timeaveraged and instantaneous wakes are discussed respectively. In the former, effects from the MVG geometry parameters are presented; while in the latter, focus is placed on the phenomenon associated with flow instability inside the wake. MVG's applications in the subsonic regime are discussed, which covers the fundamental flow separation investigations and studies to tackle several practical problems. The ongoing studies in supersonic regime dealing with shock wave boundary layer interaction (SWBLI) induced separation are reviewed later, where the presentation is organized according to different types of SWBLI with emphasis on the interaction region.

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Section: Fundamental Separation Controlmentioning

confidence: 99%

Micro Vortex Generators for Boundary Layer Control: Principles and Applications

Sun¹

2015

International Journal of Flow Control

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“…They found that the rectangular vortex generator with higher angle of attack or larger frontal area showed the best heat transfer performance. Ashill et al carried out experiments on wedge and triangular vane types of vortex generators of h/δ = 0.3 on a bump [5]. Yao et al measured flow field downstream of a single rectangular vortex generator using stereoscopic particle image velocimetry (Stereo-PIV herein after) [4].…”

Section: Introductionmentioning

confidence: 99%

Wake Characteristics of Vane-Type Vortex Generators in a Flat Plate Laminar Boundary Layer

Shim¹,

Jo²,

Chang³

et al. 2015

International Journal of Aeronautical and Space Sciences

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Experimental and numerical investigations were conducted to identify the wake characteristics downstream of two vanetype vortex generators over laminar flat plate boundary layer. Experimental study was carried out by using the stereoscopic particle image velocimetry. To describe the flow field around the vortex generator in detail, numerical study was performed. We considered two different planform shapes of vortex generator: triangular and rectangular shape. The height of the generator was chosen to be about the boundary layer thickness at the position of its installation. Two different lengths of the generator were chosen: two and five times the height. Wake measurements were carried out at three angles of attack for each configuration. Wake characteristics for each case such as overall vortical structure, vorticity distribution, and location of vortex center with downstream distance were obtained from the PIV data. Wake characteristics, as expected, were found to vary strongly with the geometry and angle of attack so that no general tendency could be deduced. Causes of this irregular tendency were explained by using the results of the numerical simulation.

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“…The micro-vortex generator (MVG), also known as low-profile vortex generator [1] or sub-boundary layer vortex generator (SBVG) [2], is receiving increasing research interests in the area of aerospace engineering.…”

Section: Introductionmentioning

confidence: 99%

Decay of the supersonic turbulent wakes from micro-ramps

et al. 2014

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This is the accepted version of the paper.This version of the publication may differ from the final published version. The wakes resulting from micro-ramps immersed in a supersonic turbulent boundary layer at Ma=2.0 are investigated by means of particle image velocimetry (PIV). Two micro-ramps are investigated with height of 60% and 80% of the undisturbed boundary layer, respectively. The measurement domain is Permanent repository link

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Research at DERA on sub boundary layer vortex generators (SBVGs)

Cited by 110 publications

References 0 publications

Micro Vortex Generators for Boundary Layer Control: Principles and Applications

Micro Vortex Generators for Boundary Layer Control: Principles and Applications

Wake Characteristics of Vane-Type Vortex Generators in a Flat Plate Laminar Boundary Layer

Decay of the supersonic turbulent wakes from micro-ramps

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