Author: Terence A. Ghee
Publisher:
ISBN:
Category : Flow visualization
Languages : en
Pages : 40
Book Description
Exploratory Flow Visualization Investigation of Mast-mounted Sights in the Presence of a Rotor
Author: Terence A. Ghee
Publisher:
ISBN:
Category : Flow visualization
Languages : en
Pages : 40
Book Description
Publisher:
ISBN:
Category : Flow visualization
Languages : en
Pages : 40
Book Description
Exploratory Flow Visualization Investigation of Mast-Mounted Sights in Presence of a Rotor
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722223472
Category :
Languages : en
Pages : 36
Book Description
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...
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722223472
Category :
Languages : en
Pages : 36
Book Description
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:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 376
Book Description
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.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 376
Book Description
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 Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1092
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1092
Book Description
Monthly Catalogue, United States Public Documents
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1094
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1094
Book Description
NASA Technical Memorandum
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 176
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 176
Book Description
NASA Langley Scientific and Technical Information Output, 1995
Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 172
Book Description
This document is a compilation of the scientific and technical information that the Langley Research Center has produced during the calendar year 1995. Included are citations for formal reports, high-numbered conference publications, high-numbered technical memorandums, contractor reports, journal articles and other publications, meeting presentations, technical talks, computer programs, tech briefs, and patents.
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 172
Book Description
This document is a compilation of the scientific and technical information that the Langley Research Center has produced during the calendar year 1995. Included are citations for formal reports, high-numbered conference publications, high-numbered technical memorandums, contractor reports, journal articles and other publications, meeting presentations, technical talks, computer programs, tech briefs, and patents.
Government Reports Announcements & Index
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 536
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 536
Book Description
Proceedings of the ... ASME Design Engineering Technical Conferences
Author:
Publisher:
ISBN:
Category : Computer-aided design
Languages : en
Pages : 622
Book Description
Publisher:
ISBN:
Category : Computer-aided design
Languages : en
Pages : 622
Book Description
Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 325)
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 470
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 470
Book Description