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Experimental Investigation Of Model Variable Geometry And Ogee Tip Rotors
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Book Synopsis Experimental Investigation of Model Variable-geometry and Ogee Tip Rotors by : Anton J. Landgrebe
Download or read book Experimental Investigation of Model Variable-geometry and Ogee Tip Rotors written by Anton J. Landgrebe and published by . This book was released on 1974 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was conducted to systematically explore the effects of inter-blade spatial relationships and pitch variations on rotor performance and wake geometry. Variable-geometry rotors consisting of various combinations of blade length, axial spacing, azimuth spacing, and collective pitch were tested at model scale in hover and forward flight. In addition, a hover test of a model rotor with an ogee blade tip design was conducted to determine its performance and wake characteristics. The results of this investigation indicate that properly selected variable geometry rotor configurations can offer substantial improvements in hover performance without adversely affecting forward flight performance. Axial spacing of alternate blades was found to provide the greatest performance benefit, and further improvements were achieved by combining azimuth spacing with axial spacing. The performance benefit appears to be related to the relief of local adverse aerodynamic phenomena produced by vortex interference. The ogee tip design was found to substantially reduce the concentrated core intensity of the tip vortex, and could thus prove beneficial for the relief of blade-vortex interaction problems. However, the ogee tip was found to reduce hover performance at model scale.
Book Synopsis Experimental Investigation of Model Variable-geometry and Ogee Tip Rotors by : Anton J. Landgrebe
Download or read book Experimental Investigation of Model Variable-geometry and Ogee Tip Rotors written by Anton J. Landgrebe and published by . This book was released on 1974 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was conducted to systematically explore the effects of inter-blade spatial relationships and pitch variations on rotor performance and wake geometry. Variable-geometry rotors consisting of various combinations of blade length, axial spacing, azimuth spacing, and collective pitch were tested at model scale in hover and forward flight. In addition, a hover test of a model rotor with an ogee blade tip design was conducted to determine its performance and wake characteristics. The results of this investigation indicate that properly selected variable geometry rotor configurations can offer substantial improvements in hover performance without adversely affecting forward flight performance. Axial spacing of alternate blades was found to provide the greatest performance benefit, and further improvements were achieved by combining azimuth spacing with axial spacing. The performance benefit appears to be related to the relief of local adverse aerodynamic phenomena produced by vortex interference. The ogee tip design was found to substantially reduce the concentrated core intensity of the tip vortex, and could thus prove beneficial for the relief of blade-vortex interaction problems. However, the ogee tip was found to reduce hover performance at model scale.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1981 with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book NASA Technical Paper written by and published by . This book was released on 1979 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements by :
Download or read book Government Reports Announcements written by and published by . This book was released on 1974 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Sweep Angle on the Pressure Distributions and Effectiveness of the Ogee Tip in Diffusing a Line Vortex by : John C. Balcerak
Download or read book Effect of Sweep Angle on the Pressure Distributions and Effectiveness of the Ogee Tip in Diffusing a Line Vortex written by John C. Balcerak and published by . This book was released on 1973 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1977 with total page 1196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the NASA·Industry·University General Aviation Drag Reduction Workshop by : Jan Roskam
Download or read book Proceedings of the NASA·Industry·University General Aviation Drag Reduction Workshop written by Jan Roskam and published by . This book was released on 1984 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Contractor Report written by and published by . This book was released on 1976 with total page 998 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering written by and published by . This book was released on 1975 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
Download or read book The Aeronautical Journal written by and published by . This book was released on 1974 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Machines, Mechanism and Robotics by : Rajeev Kumar
Download or read book Machines, Mechanism and Robotics written by Rajeev Kumar and published by Springer Nature. This book was released on 2021-07-21 with total page 1830 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume includes select papers presented during the 4th International and 19th National Conference on Machines and Mechanism (iNaCoMM 2019), held in Indian Institute of Technology, Mandi. It presents research on various aspects of design and analysis of machines and mechanisms by academic and industry researchers.
Author :United States. Congress. Senate. Select Committee on Small Business Publisher : ISBN 13 : Total Pages :572 pages Book Rating :4.:/5 (327 download)
Book Synopsis Technology and Management Assistance Programs of the Small Business Administration by : United States. Congress. Senate. Select Committee on Small Business
Download or read book Technology and Management Assistance Programs of the Small Business Administration written by United States. Congress. Senate. Select Committee on Small Business and published by . This book was released on 1976 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Survey of Theoretical and Experimental Coaxial Rotor Aerodynamic Research by : Colin P. Coleman
Download or read book A Survey of Theoretical and Experimental Coaxial Rotor Aerodynamic Research written by Colin P. Coleman and published by . This book was released on 1997 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. Senate. Select Committee on Small Business Publisher : ISBN 13 : Total Pages :1442 pages Book Rating :4.:/5 (36 download)
Book Synopsis Hearings, Reports and Prints of the Senate Select Committee on Small Business by : United States. Congress. Senate. Select Committee on Small Business
Download or read book Hearings, Reports and Prints of the Senate Select Committee on Small Business written by United States. Congress. Senate. Select Committee on Small Business and published by . This book was released on 1975 with total page 1442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Noise Suppression with High Mach Number Inlets by : Edward Lumsdaine
Download or read book Noise Suppression with High Mach Number Inlets written by Edward Lumsdaine and published by . This book was released on 1976 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Conference Publication written by and published by . This book was released on 1988 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
