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Summary And Recent Results From The Nasa Advanced High Speed Propeller Research Program
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781725572805 Total Pages :34 pages Book Rating :4.5/5 (728 download)
Book Synopsis Summary and Recent Results from the NASA Advanced High Speed Propeller Research Program by : National Aeronautics and Space Administration (NASA)
Download or read book Summary and Recent Results from the NASA Advanced High Speed Propeller Research Program written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-14 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced high-speed propellers offer large performance improvements for aircraft that cruise in the Mach 0.7 to 0.8 speed regime. The current status of the NASA research program on high-speed propeller aerodynamics, acoustics, and aeroelastics is described. Recent wind tunnel results for five 8- to 10-blade advanced models are compared with analytical predictions. Test results show that blade sweep was important in achieving net efficiencies near 80 percent at Mach 0.8 and reducing near-field cruise noise by dB. Lifting line and lifting surface aerodynamic analysis codes are under development and some initial lifting line results are compared with propeller force and probe data. Some initial laser velocimeter measurements of the flow field velocities of an 8-bladed 45 deg swept propeller are shown. Experimental aeroelastic results indicate that cascade effects and blade sweep strongly affect propeller aeroelastic characteristics. Comparisons of propeller near-field noise data with linear acoustic theory indicate that the theory adequate predicts near-field noise for subsonic tip speeds but overpredicts the noise for supersonic tip speeds. Potential large gains in propeller efficiency of 7 to 11 percent at Mach 0.8 may be possible with advanced counter-rotation propellers. Mitchell, G. A. and Mikkelson, D. C. Glenn Research Center NASA-TM-82891, E-1269, NAS 1.15:82891 RTOP 535-03-12...
Book Synopsis Advanced Turboprop Project by : Roy D. Hager
Download or read book Advanced Turboprop Project written by Roy D. Hager and published by . This book was released on 1988 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Turboprop Project by : Roy D. Hager
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Book Synopsis Aeroacoustics of Flight Vehicles by : Harvey H. Hubbard
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Book Synopsis High Speed Turboprops for Executive Aircraft, Potential and Recent Test Results by :
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Book Synopsis Flow-field Survey of an Empennage Wake Interacting with a Pusher Propeller by :
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Author :North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development Publisher : ISBN 13 : Total Pages :484 pages Book Rating :4.3/5 (243 download)
Book Synopsis Aerodynamics and Acoustics of Propellers by : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development
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Book Synopsis Method for the Prediction of the Installation Aerodynamics of a Propfan at Subsonic Speeds by : B. Chandrasekaran
Download or read book Method for the Prediction of the Installation Aerodynamics of a Propfan at Subsonic Speeds written by B. Chandrasekaran and published by . This book was released on 1985 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
