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Aerodynamic Interaction Effects Of A Helicopter Rotor And Fuselage
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721931309 Total Pages :216 pages Book Rating :4.9/5 (313 download)
Book Synopsis Aerodynamic Interaction Effects of a Helicopter Rotor and Fuselage by : National Aeronautics and Space Administration (NASA)
Download or read book Aerodynamic Interaction Effects of a Helicopter Rotor and Fuselage written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three year Cooperative Research Agreements made in each of the three years between the Subsonic Aerodynamics Branch of the NASA Langley Research Center and the Virginia Polytechnic Institute and State University (Va. Tech) has been completed. This document presents results from this three year endeavor. The goal of creating an efficient method to compute unsteady interactional effects between a helicopter rotor and fuselage has been accomplished. This paper also includes appendices to support these findings. The topics are: 1) Rotor-Fuselage Interactions Aerodynamics: An Unsteady Rotor Model; and 2) Rotor/Fuselage Unsteady Interactional Aerodynamics: A New Computational Model. Boyd, David D., Jr. Langley Research Center NCC1-245
Book Synopsis Rotor/body Aerodynamic Interactions by : Mark D. Betzina
Download or read book Rotor/body Aerodynamic Interactions written by Mark D. Betzina and published by . This book was released on 1983 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wind-tunnel investigation was conducted in which independent, steady-state aerodynamic forces and moments were measured on a 2.24-m-diam, two- bladed helicopter rotor and on several different bodies. The objective was to determine the mutual interaction effects for variations in velocity, thrust, tip-path-plane angle of attack, body angle of attack, rotor/body position, and body geometry. the results of the investigation show that the body longitudinal aerodynamic characteristics are significantly affected by the presence of a rotor and hub, and that the hub interference may be a major part of such interaction. This report presents the effects of various parameters on the interactions and discusses the difficulties encountered in determining the effect of the body on the rotor performance.
Book Synopsis Rotor-Fuselage Interaction: Analysis and Validation with Experiment by :
Download or read book Rotor-Fuselage Interaction: Analysis and Validation with Experiment written by and published by . This book was released on 1997 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Helicopter rotor-fuselage aerodynamic interactions by : Adam R. Kenyon
Download or read book Helicopter rotor-fuselage aerodynamic interactions written by Adam R. Kenyon and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Principles of Helicopter Aerodynamics by : J. Gordon Leishman
Download or read book Principles of Helicopter Aerodynamics written by J. Gordon Leishman and published by Cambridge University Press. This book was released on 2002-12-23 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helicopters are highly capable and useful rotating-wing aircraft with roles that encompass a variety of civilian and military applications. Their usefulness lies in their unique ability to take off and land vertically, to hover stationary relative to the ground, and to fly forward, backward, or sideways. These unique flying qualities, however, come at a high cost including complex aerodynamic problems, significant vibrations, high levels of noise, and relatively large power requirements compared to fixed-wing aircraft. This book, written by an internationally recognized expert, provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft. Every chapter is extensively illustrated and concludes with a bibliography and homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thorough and up-to-date text on rotating-wing aerodynamics.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722940744 Total Pages :130 pages Book Rating :4.9/5 (47 download)
Book Synopsis An Unsteady Helicopter Rotor by : National Aeronautics and Space Administration (NASA)
Download or read book An Unsteady Helicopter Rotor written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computational method was developed to treat unsteady aerodynamic interactions between a helicopter rotor, wake, and fuselage and between the main and tail rotors. An existing lifting line prescribed wake rotor analysis and a source panel fuselage analysis were coupled and modified to predict unsteady fuselage surface pressures and airloads. A prescribed displacement technique is used to position the rotor wake about the fuselage. Either a rigid blade or an aeroelastic blade analysis may be used to establish rotor operating conditions. Sensitivity studies were performed to determine the influence of the wake fuselage geometry on the computation. Results are presented that describe the induced velocities, pressures, and airloads on the fuselage and on the rotor. The ability to treat arbitrary geometries is demonstrated using a simulated helicopter fuselage. The computational results are compared with fuselage surface pressure measurements at several locations. No experimental data was available to validate the primary product of the analysis: the vibratory airloads on the entire fuselage. A main rotor-tail rotor interaction analysis is also described, along with some hover and forward flight. Lorber, Peter F. and Egolf, T. Alan Unspecified Center COMPUTATIONAL FLUID DYNAMICS; CONFIGURATION INTERACTION; INTERACTIONAL AERODYNAMICS; ROTARY WINGS; UNSTEADY AERODYNAMICS; UNSTEADY FLOW; AERODYNAMIC LOADS; FUSELAGES; HELICOPTER WAKES; HORIZONTAL FLIGHT; HOVERING; PRESSURE EFFECTS...
Book Synopsis Special Opportunities in Helicopter Aerodynamics by : W. J. McCroskey
Download or read book Special Opportunities in Helicopter Aerodynamics written by W. J. McCroskey and published by . This book was released on 1983 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerodynamic research relating to modern helicopters includes the study of three-dimensional, unsteady, nonlinear flow fields. A selective review is made of some of the phenomenon that hamper the development of satisfactory engineering prediction techniques, but which provides a rich source of research opportunities: flow separations, compressibility effects, complex vortical wakes, and aerodynamic interference between components. Several examples of work in progress are given, including dynamic stall alleviation, the development of computational methods for transonic flow, rotor-wake predictions, and blade-vortex interactions. (Author).
Book Synopsis Principles of Helicopter Aerodynamics with CD Extra by : Gordon J. Leishman
Download or read book Principles of Helicopter Aerodynamics with CD Extra written by Gordon J. Leishman and published by Cambridge University Press. This book was released on 2006-04-24 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by an internationally recognized teacher and researcher, this book provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft such as tilt rotors and autogiros. The text begins with a unique technical history of helicopter flight, and then covers basic methods of rotor aerodynamic analysis, and related issues associated with the performance of the helicopter and its aerodynamic design. It goes on to cover more advanced topics in helicopter aerodynamics, including airfoil flows, unsteady aerodynamics, dynamic stall, and rotor wakes, and rotor-airframe aerodynamic interactions, with final chapters on autogiros and advanced methods of helicopter aerodynamic analysis. Extensively illustrated throughout, each chapter includes a set of homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thoroughly revised and updated text on rotating-wing aerodynamics.
Book Synopsis Aerodynamic Interactions Between a 1/6 Scale Helicopter Rotor and a Body of Revolution by :
Download or read book Aerodynamic Interactions Between a 1/6 Scale Helicopter Rotor and a Body of Revolution written by and published by . This book was released on 1982 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wind-tunnel investigation was conducted in which independent, steady-state aerodynamic forces and moments were measured on a 2.24-m-diam, two-bladed helicopter rotor and a body of revolution. The objective was to determine the interaction of the body on the rotor performance and the effect of the rotor on the body aerodynamics for variations in velocity, thrust, tip-path-plane angle of attack, body angle of attack, rotor/body position, and body nose geometry. Results show that a body of revolution near the rotor can produce significant favorable or unfavorable effects on rotor performance, depending on the operating condition. Body longitudinal aerodynamic characteristics are significantly modified by the presence of an operating rotor and hub. (Author).
Book Synopsis An Unsteady Helicopter Rotor by : Peter Frederick Lorber
Download or read book An Unsteady Helicopter Rotor written by Peter Frederick Lorber and published by . This book was released on 1988 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Method of Computing the Aerodynamic Interactions of a Rotor-fuselage Configuration in Forward Flight by : John Donaldson Berry
Download or read book A Method of Computing the Aerodynamic Interactions of a Rotor-fuselage Configuration in Forward Flight written by John Donaldson Berry and published by . This book was released on 1990 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Aerodynamic Interaction Between Main and Tail Rotors on Helicopter Hover Performance and Noise by :
Download or read book Effects of Aerodynamic Interaction Between Main and Tail Rotors on Helicopter Hover Performance and Noise written by and published by . This book was released on 1983 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Helicopter Aerodynamics Volume I by : Ray Prouty
Download or read book Helicopter Aerodynamics Volume I written by Ray Prouty and published by Lulu.com. This book was released on 2009 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a collection of Ray Prouty's columns from Rotor and Wing magazine from 1979 to 1992.
Book Synopsis Elements of Propeller and Helicopter Aerodynamics by : Daniel Otto Dommasch
Download or read book Elements of Propeller and Helicopter Aerodynamics written by Daniel Otto Dommasch and published by . This book was released on 1953 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Aerodynamic Interaction Between Main and Tail Rotors on Helicopter Hover Performance and Noise by : Ross P. Menger
Download or read book Effects of Aerodynamic Interaction Between Main and Tail Rotors on Helicopter Hover Performance and Noise written by Ross P. Menger and published by . This book was released on 1985 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Helicopter Dynamics and Aerodynamics by : Peter Rowland Payne
Download or read book Helicopter Dynamics and Aerodynamics written by Peter Rowland Payne and published by . This book was released on 1959 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Basic Helicopter Aerodynamics by : J. Seddon
Download or read book Basic Helicopter Aerodynamics written by J. Seddon and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 1990 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is an excellent introduction to the aerodynamics of helicopters. Basic Helicopter Aerodynamics provides an account of the first principles in the fluid mechanics and flight dynamics of single-rotor helicopters. The text is intended to provide, in a short volume, an introduction to the theory of rotary-wing aircraft for use by undergraduate and graduate students, while providing a detailed description of the physical phenomena involved. The text assumes that the reader already has some knowledge of differences between the fixed- and rotary-wing aircraft. Many diagrams, drawings, graphs, and representative sets of data augment the text.
