Virtual shaping on NACA 0015 by means of a high momentum coefficient synthetic jet
Virtual shaping on NACA 0015 by means of a high momentum coefficient synthetic jet
Results concerning flow control on a NACA 0015 airfoil using high power synthetic jets are presented for low incidences and for Reynolds numbers ranging from 132000 to 425000. The forcing was operated through a spanwise slit positioned near the leading edge at x/c = 1.25% or at x/c = 10% on the upper surface. Static pressure distribution measurements around the airfoil, wake surveys and smoke flow visualizations were performed. Pressure distributions were significantly modified around the injection location, showing an area of intense suction which increased the lift and strongly affected the drag. Flow visualizations highlighted that the intense suction was due to a virtual shaping effect caused by the formation of a recirculation bubble capable of displacing the streamlines. Low momentum deficits in the wake velocity distributions and, in certain conditions, jet-like flow were observed for the forced cases. Finally, a scaling law relating the bubble size to the forcing intensity is proposed.
255-276
Orazi, Matteo
a6177aef-f756-4125-bd51-1ece141259ac
Lasagna, Davide
0340a87f-f323-40fb-be9f-6de101486b24
Iuso, Gaetano
bddefee6-24c3-44fd-9b60-bec9ba1df95f
23 August 2012
Orazi, Matteo
a6177aef-f756-4125-bd51-1ece141259ac
Lasagna, Davide
0340a87f-f323-40fb-be9f-6de101486b24
Iuso, Gaetano
bddefee6-24c3-44fd-9b60-bec9ba1df95f
Orazi, Matteo, Lasagna, Davide and Iuso, Gaetano
(2012)
Virtual shaping on NACA 0015 by means of a high momentum coefficient synthetic jet.
International Journal of Flow Control, 3 (4), .
(doi:10.1260/1756-8250.3.4.255).
Abstract
Results concerning flow control on a NACA 0015 airfoil using high power synthetic jets are presented for low incidences and for Reynolds numbers ranging from 132000 to 425000. The forcing was operated through a spanwise slit positioned near the leading edge at x/c = 1.25% or at x/c = 10% on the upper surface. Static pressure distribution measurements around the airfoil, wake surveys and smoke flow visualizations were performed. Pressure distributions were significantly modified around the injection location, showing an area of intense suction which increased the lift and strongly affected the drag. Flow visualizations highlighted that the intense suction was due to a virtual shaping effect caused by the formation of a recirculation bubble capable of displacing the streamlines. Low momentum deficits in the wake velocity distributions and, in certain conditions, jet-like flow were observed for the forced cases. Finally, a scaling law relating the bubble size to the forcing intensity is proposed.
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Published date: 23 August 2012
Organisations:
Aerodynamics & Flight Mechanics Group
Identifiers
Local EPrints ID: 358013
URI: http://eprints.soton.ac.uk/id/eprint/358013
ISSN: 1756-8250
PURE UUID: 76ec9a3e-2e92-44ab-bb53-8a4903d8ad74
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Date deposited: 08 Oct 2013 12:55
Last modified: 15 Mar 2024 03:47
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Author:
Matteo Orazi
Author:
Gaetano Iuso
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