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collection:
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nasa new
collection
nasa new
collection
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mediatype:
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texts
mediatype
texts
mediatype
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collection:
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nasa_techdocs
collection
nasa_techdocs
collection
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title:
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Active Control of Separation From the Flap of a Supercritical Airfoil
title
Active Control of Separation From the Flap of a Supercritical Airfoil
title
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description:
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Active flow control in the form of periodic zero-mass-flux excitation was applied at several regions on the leading edge and trailing edge flaps of a simplified high-lift system t o delay flow separation. The NASA Energy Efficient Transport (EET) supercritical airfoil was equipped with a 15% chord simply hinged leading edge flap and a 25% chord simply hinged trailing edge flap. Detailed flow features were measured in an attempt to identify optimal actuator placement. The measurements included steady and unsteady model and tunnel wall pressures, wake surveys, arrays of surface hot-films, flow visualization, and particle image velocimetry (PIV). The current paper describes the application of active separation control at several locations on the deflected trailing edge flap. High frequency (F() approx.= 10) and low frequency amplitude modulation (F()AM approx.= 1) of the high frequency excitation were used for control. Preliminary efforts to combine leading and trailing edge flap excitations are also reported.
description
Active flow control in the form of periodic zero-mass-flux excitation was applied at several regions on the leading edge and trailing edge flaps of a simplified high-lift system t o delay flow separation. The NASA Energy Efficient Transport (EET) supercritical airfoil was equipped with a 15% chord simply hinged leading edge flap and a 25% chord simply hinged trailing edge flap. Detailed flow features were measured in an attempt to identify optimal actuator placement. The measurements included steady and unsteady model and tunnel wall pressures, wake surveys, arrays of surface hot-films, flow visualization, and particle image velocimetry (PIV). The current paper describes the application of active separation control at several locations on the deflected trailing edge flap. High frequency (F() approx.= 10) and low frequency amplitude modulation (F()AM approx.= 1) of the high frequency excitation were used for control. Preliminary efforts to combine leading and trailing edge flap excitations are also reported.
description
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subject:
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TORQUE
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subject:
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TEMPERATURE EFFECTS
subject
TEMPERATURE EFFECTS
subject
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subject:
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FLIGHT TESTS
subject
FLIGHT TESTS
subject
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subject:
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INDEPENDENT VARIABLES
subject
INDEPENDENT VARIABLES
subject
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subject:
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AIRSPEED
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subject:
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AERODYNAMIC LOADS
subject
AERODYNAMIC LOADS
subject
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subject:
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TAIL ROTORS
subject
TAIL ROTORS
subject
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subject:
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UTILITY AIRCRAFT
subject
UTILITY AIRCRAFT
subject
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identifier:
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nasa_techdoc_2003006 3166
identifier
nasa_techdoc_2003006 3166
identifier
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licenseurl:
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uploader:
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gwilliam@archive.org
uploader
gwilliam@archive.org
uploader
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addeddate:
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2011-06-01 03:48:12
addeddate
2011-06-01 03:48:12
addeddate
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publicdate:
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2011-06-01 03:48:12
publicdate
2011-06-01 03:48:12
publicdate
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creator:
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Yao, Chung-Sheng
creator
Yao, Chung-Sheng
creator
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creator:
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Seifert, Av
creator
Seifert, Av
creator
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creator:
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Melton, La Tunia Pack
creator
Melton, La Tunia Pack
creator
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ImageUID:
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file:/home/lunaadmin /Source_download/201 106/1/nasa_techdoc_2 0030063166/200300631 66.pdf
ImageUID
file:/home/lunaadmin /Source_download/201 106/1/nasa_techdoc_2 0030063166/200300631 66.pdf
ImageUID
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date:
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2003-01-01
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rights:
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Public Domain
rights
Public Domain
rights
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ppi:
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600
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year:
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2003
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language:
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eng
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document-source:
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CASI
document_source
CASI
document-source
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documentid:
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20030063166
documentid
20030063166
documentid
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nasa-center:
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Langley Research Center
nasa_center
Langley Research Center
nasa-center
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online-source:
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http://wayback.archi ve-it.org/1792/20100 129053000/http://hdl .handle.net/2060/200 30063166
online_source
http://wayback.archi ve-it.org/1792/20100 129053000/http://hdl .handle.net/2060/200 30063166
online-source
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original-nasa-rights:
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Unclassified; Copyright; Unlimited; Publicly available;
original_nasa_rights
Unclassified; Copyright; Unlimited; Publicly available;
original-nasa-rights
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updated-added-to-ntrs:
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2009-08-13
updated_added_to_ntr s
2009-08-13
updated-added-to-ntr s
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contributor:
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NASA
contributor
NASA
contributor
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identifier-access:
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identifier_access
identifier-access
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identifier-ark:
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ark:/13960/t75t4hr3k
identifier_ark
ark:/13960/t75t4hr3k
identifier-ark
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ocr:
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ABBYY FineReader 8.0
ocr
ABBYY FineReader 8.0
ocr
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repub_state:
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4
repub_state
4
repub_state
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