Exploratory Flow Visualization Investigation Of Mast Mounted Sights In The Presence Of A Rotor
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Exploratory Flow Visualization Investigation of Mast mounted Sights in the Presence of a Rotor
Author | : Terence A. Ghee |
Publsiher | : Unknown |
Total Pages | : 40 |
Release | : 1995 |
Genre | : Flow visualization |
ISBN | : NASA:31769000523509 |
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Exploratory Flow Visualization Investigation of Mast Mounted Sights in Presence of a Rotor
Author | : National Aeronautics and Space Administration (NASA) |
Publsiher | : Createspace Independent Publishing Platform |
Total Pages | : 36 |
Release | : 2018-07-05 |
Genre | : Electronic Book |
ISBN | : 1722223472 |
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A flow visualization investigation with a laser light sheet system was conducted on a 27-percent-scale AH-64 attack helicopter model fitted with two mast-mounted sights in the langley 14- by 22-foot subsonic tunnel. The investigation was conducted to identify aerodynamic phenomena that may have contributed to adverse vibration encountered during full-scale flight of the AH-64D apache/longbow helicopter with an asymmetric mast-mounted sight. Symmetric and asymmetric mast-mounted sights oriented at several skew angles were tested at simulated forward and rearward flight speeds of 30 and 45 knots. A laser light sheet system was used to visualize the flow in planes parallel to and perpendicular to the free-stream flow. Analysis of these flow visualization data identified frequencies of flow patterns in the wake shed from the sight, the streamline angle at the sight, and the location where the shed wake crossed the rotor plane. Differences in wake structure were observed between the sight configurations and various skew angles. Analysis of lateral light sheet plane data implied significant vortex structure in the wake of the asymmetric mast-mounted sight in the configuration that produced maximum in-flight vibration. The data showed no significant vortex structure in the wake of the asymmetric and symmetric configurations that produced no increase in in-flight adverse vibration. Ghee, Terence A. and Kelley, Henry L. Unspecified Center RTOP 505-59-36-01; RTOP 282-10-01-01...
Scientific and Technical Aerospace Reports
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 376 |
Release | : 1995 |
Genre | : Aeronautics |
ISBN | : MINN:30000011064601 |
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Monthly Catalogue United States Public Documents
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 1094 |
Release | : 1995-12 |
Genre | : Government publications |
ISBN | : UIUC:30112075789062 |
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Monthly Catalog of United States Government Publications
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 1092 |
Release | : 1995 |
Genre | : Government publications |
ISBN | : OSU:32435058894031 |
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NASA Technical Memorandum
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 176 |
Release | : 1996 |
Genre | : Aeronautics |
ISBN | : STANFORD:36105024157922 |
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The Shock and Vibration Digest
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 624 |
Release | : 1996 |
Genre | : Shock (Mechanics) |
ISBN | : STANFORD:36105020220849 |
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Government Reports Announcements Index
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 544 |
Release | : 1995 |
Genre | : Science |
ISBN | : OSU:32435053887675 |
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