Correlation of Airloads on a Two-bladed Helicopter Rotor PDF Download
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Author: Francisco J. Fernandez
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 32
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Book Description
Author: Francisco J. Fernandez
Publisher:
ISBN:
Category : Rotors (Helicopters)
Languages : en
Pages : 32
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722132132
Category :
Languages : en
Pages : 30
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Book Description
Airloads measured on a two-bladed helicopter rotor in flight during the Ames' Tip Aerodynamic and Acoustic Test are compared with calculations from a comprehensive helicopter analysis (CAMRAD/JA), and the pressures compared with calculations from a full-potential rotor code (FPR). The flight-test results cover an advance ratio range of 0.19 to 0.38. The lowest-speed case is characterized by the presence of significant blade-vortex interactions. Good correlation of peak-to-peak vortex-induced loads and the corresponding pressures is obtained. Results of the correlation for this two-bladed rotor are substantially similar to those for three- and four-bladed rotors, including the tip-vortex core size for best correlation, calculation of the peak-to-peak loads on the retreating side, and calculation of vortex iduced loads on inboard radial stations. The higher-speed cases are characterized by the presence of transonic flow on the outboard sections of the blade. Comparison of calculated and measured airloads on the advancing side is not considered appropriate because the presence of shocks makes chordwise integration of the measured data difficult. However, good correlation of the corresponding pressures is obtained. Fernandez, Francisco J. and Johnson, Wayne Ames Research Center RTOP 505-59-36...
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 956
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 468
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 318
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Author: United States. Congress. House. Committee on Appropriations
Publisher:
ISBN:
Category :
Languages : en
Pages : 856
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 716
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
The lack of progress in understanding the physics of rotorcraft loads and vibration over the last 30 years is addressed in this paper. As befits this extraordinarily difficult problem, the reasons for the lack of progress are complicated and difficult to ascertain. It is proposed here that the difficulty lies within at least three areas: 1) a loss of perspective as to what are the key factors in rotor loads and vibration, 2) the overlooking of serious unsolved problems in the field, and 3) cultural barriers that impede progress. Some criteria are suggested for future research to provide a more concentrated focus on the problem.
Author:
Publisher: ScholarlyEditions
ISBN: 1490110909
Category : Technology & Engineering
Languages : en
Pages : 676
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Book Description
Issues in Transportation Research and Application: 2013 Edition is a ScholarlyEditions™ book that delivers timely, authoritative, and comprehensive information about Transport Geography. The editors have built Issues in Transportation Research and Application: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Transport Geography in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Transportation Research and Application: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Author:
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 262
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Book Description
