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Evaluation of minia...
Evaluation of miniature vortex generators for flow control in Falkner-Skan boundary layers
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- Downs, Robert S. , I I I (författare)
- KTH,Mekanik,Linné Flow Center, FLOW
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- Fallenius, Bengt E. G. (författare)
- KTH,Mekanik,Linné Flow Center, FLOW
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- Fransson, Jens H. M. (författare)
- KTH,Mekanik,Linné Flow Center, FLOW
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Mårtensson, H. (författare)
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(creator_code:org_t)
- 2016-01-02
- 2016
- Engelska.
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Ingår i: 54th AIAA Aerospace Sciences Meeting. - Reston, Virginia : American Institute of Aeronautics and Astronautics. - 9781624103933
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.2...
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Abstract
Ämnesord
Stäng
- Vortex generators with heights comparable to displacement thickness are an effective means of producing persistent mean-flow streaks in laminar boundary layers. Inducing streaky base flows can suppress growth of unsteady disturbances which would otherwise incite laminar-to-turbulent transition. Previous experimental and numerical works have demonstrated the versatility of these miniature vortex generators (MVGs) in zero pressure gradient boundary layers. In this work, mean-flow disturbances developing from MVGs in adverse and favorable pressure gradient boundary layers are measured systemically to assess the possibility of extending MVG-based flow control to these scenarios. Boundary-layer streak amplitudes are measured across a range of Falkner-Skan m values and an empirical scaling is found in congruence with existing results. The effect of streaks on transition in an adverse pressure gradient boundary layer is also tested and moderate increases to laminar flow extents are observed.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Nyckelord
- Aerospace engineering
- Aviation
- Boundary layer flow
- Boundary layers
- Flow control
- Laminar flow
- Pressure gradient
- Turbulent flow
- Vortex flow
- Adverse pressure gradient
- Boundary layer streaks
- Displacement thickness
- Empirical scaling
- Favorable pressure gradients
- Laminar to turbulent transitions
- Unsteady disturbance
- Zero-pressure-gradient boundary layers
- Laminar boundary layer
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
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