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Evaluation of ramp-type micro vortex generators using swirl center tracking
Jatinder Pal Singh Sandhu, , Shashank Subramanian
Published in American Institute of Aeronautics and Astronautics Inc.
2018
Volume: 56
   
Issue: 9
Pages: 3449 - 3459
Abstract
The evolution of the primary vortex pair downstream of micro vortex generators placed in a supersonic stream is compared using a swirl center tracking technique, for standard, slotted, and split-ramp-type vortex generators. Evolution of vortex strength, determined using circulation, and distribution of vortices, determined using contours of helicity, are also compared. Results show that secondary vortices emerge stronger, and liftoff heights drop, with the introduction of slot (slotted micro vortex generator) or gaps (split-ramp micro vortex generator). Near-surface contours of axial velocity and integral properties of the boundary layer are then compared to evaluate the effects of the evolution of the vortical structures on the flowfield. Results shows that the split-ramp device results in the most energetic near-surface flow but the worst outgoing boundary-layer integral properties, whereas the slotted-ramp devices with taper fare well on both counts. The computations performed in this work involve supersonic flow past single micro vortex generators at Mach 2.5 and use an immersed-boundary method to render the control devices. The flow solver is suitable for high-speed turbulent flows and has been extensively validated in earlier works. The turbulence model used is Menter's k − ω∕k − ε shear-stress transport version. Copyright © 2018 by the American Institute of Aeronautics and Astronautics, Inc.
About the journal
JournalData powered by TypesetAIAA Journal
PublisherData powered by TypesetAmerican Institute of Aeronautics and Astronautics Inc.
ISSN00011452
Impact Factor1.868
Open AccessNo
Citation Styleunsrt
Sherpa RoMEO Archiving PolicyGreen
Concepts (17)
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    Atmospheric thermodynamics
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    Boundary layers
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    RAMP GENERATORS
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    Shear stress
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    SUPERSONIC AIRCRAFT
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    Turbulence models
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    Turbulent flow
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    Vorticity
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    Immersed boundary methods
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    MICRO VORTEX GENERATORS
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    NEAR SURFACE FLOW
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    SECONDARY VORTEX
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    SHEAR-STRESS TRANSPORT
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    Tracking techniques
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    Vortex generators
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    Vortical structures
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    Vortex flow