Aircraft Drag Reduction An Overview
DOWNLOAD
Download Aircraft Drag Reduction An Overview PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Aircraft Drag Reduction An Overview book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Aircraft Drag Reduction An Overview
DOWNLOAD
Author : Mohsen Jahanmiri
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2013-01
Aircraft Drag Reduction An Overview written by Mohsen Jahanmiri and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01 with categories.
Aircraft drag reduction is a great challenge but there is certainly room for improvements. The drag breakdown of a civil transport aircraft shows that the skin friction drag and the lift-induced drag constitute the two main sources of drag, approximately one half and one third of the total drag for a typical long range aircraft at cruise conditions. This is why specific research on this topics have been initiated and it seems that Hybrid Laminar Flow technology and innovative wing tip devices offer the greatest potential. The aim of this review manuscript is to highlight the state of the art in aeronautical drag reduction, and also describe several emerging drag-reduction approaches that are either active or reactive/interactive.
Personal Aircraft Drag Reduction
DOWNLOAD
Author : Bruce H. Carmichael
language : en
Publisher:
Release Date : 2000
Personal Aircraft Drag Reduction written by Bruce H. Carmichael and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Drag (Aerodynamics) categories.
Aircraft Drag Reduction Through Extended Formation Flight
DOWNLOAD
Author : Simeon Andrew Ning
language : en
Publisher: Stanford University
Release Date : 2011
Aircraft Drag Reduction Through Extended Formation Flight written by Simeon Andrew Ning and has been published by Stanford University this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Formation flight has the potential to significantly reduce the fuel consumption of long range flights, even with existing aircraft. This research explores a safer approach to formation flying of transport aircraft, which we term extended formation flight. Extended formations take advantage of the persistence of cruise wakes and extend the streamwise separation between the aircraft by at least five wingspans. Classical aerodynamic theory suggests that the total induced drag of the formation should not change as the streamwise separation is increased, but the large separation distances of extended formation flight violate the simple assumptions of these theorems. At large distances, considerations such as wake rollup, atmospheric effects on circulation decay, and vortex motion become important to consider. We first examine the wake rollup process in the context of extended formations and develop an appropriate physics-based model. Using this model, this dissertation addresses three aspects of formation flight: longitudinally extended formations, compressibility effects, and formations of heterogeneous aircraft. Uncertainty analysis is used to investigate the induced drag savings of extended formations in the presence of variation in atmospheric properties, limitations of positioning accuracy, and uncertainty in model parameters. Next, the methodology is integrated with an Euler solver to assess the impact of compressibility while flying in formation. Finally, we examine the important considerations for optimally arranging formations of non-identical aircraft.
Aircraft Drag Reduction Technology
DOWNLOAD
Author : A. S. W. Thomas
language : en
Publisher:
Release Date : 1984
Aircraft Drag Reduction Technology written by A. S. W. Thomas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
This paper reviews the current techniques of aircraft viscous drag reduction and some of the more recent developments that have taken place in this technology. The various sources and relative contributions of aircraft drag are described including skin friction drag, pressure drag, interference drag and lift induced drag. In the discussion, emphasis is given to the physical processes that lead to these drag contributions, followed by a discussion of methods of reducing the impact of these drag sources. Finally some brief discussion is presented to show how innovative and optimized aircraft configurations can lead to drag benefits.
Reduction Of Drag Due To Lift At Supersonic Speeds
DOWNLOAD
Author : Douglas Aircraft Company
language : en
Publisher:
Release Date : 1955
Reduction Of Drag Due To Lift At Supersonic Speeds written by Douglas Aircraft Company and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1955 with Aerodynamics, Supersonic categories.
$EVERAL TOPICS RELATING TO THE REDUCTION OF DRAG DUE TO LIFT AT SUPERSONIC SPEEDS ARE DISCUSSED. The distribution of camber for optimial loading of diamond planform wings and some low drag geometries for rectangular wings are determined. It appears that substantial drag reduction, through the use of spanwise distribution of camber, may be achieved only for low reduced aspect ratios, M2-1 AR. The distribution of lift throughout volumes of prescribed shape is considered and some optimum distributions found for certain cases. It is shown that optimum spatial distributions of lift arc generally not unique. The possibility of using biplanes is explored and it is concluded that for non-interfering biplanes (wings acting as isolated monoplanes) there is an inherent structural advantage which is the result of a scale effect for geometrically similar structures The preacnt status of means for drag reduction is surveyed and the direction for further study indicated.
Drag Reduction By Shock And Boundary Layer Control
DOWNLOAD
Author : Egon Stanewsky
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
Drag Reduction By Shock And Boundary Layer Control written by Egon Stanewsky and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Technology & Engineering categories.
The survival of the Aeronautical Industries of Europe in the highly competitive World Aviation Market is strongly dependent on such factors as time-to-market of a new or derivative aircraft and on its manufacturing costs but also on the achievement of a competitive technological advantage by which an increased market share can be gained. Recognizing this, cooperative research is continuously encouraged and co-financed by the European Union in order to strengthen the scientific and technological base of the Aeronautical Industries thus providing - among others - the technological edge needed for survival. Corresponding targets of research within Area 3, Technologies for Transport Means, and here in particular Area 3A, Aeronautics Technologies, of the Industrial and Materials Technologies Program ( Brite -EuRam III, 1994 -1998) have been identified to be aircraft efficiency, cost effectiveness and environmental impact. Concerning aircraft efficiency - relevant to the present research - a reduction in aircraft drag of 10%, a reduction in aircraft fuel consumption of 30%, and a reduction in airframe, engine and system weight of 20% are envisaged. Meeting these objectives has, of course, also a strong positive impact on the environment.
Aerodynamic Drag Reduction Technologies
DOWNLOAD
Author : Peter Thiede
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Aerodynamic Drag Reduction Technologies written by Peter Thiede and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Technology & Engineering categories.
------------------------------------------------------------ This volume contains the Proceedings of the CEAS/DragNet European Drag Reduction Conference held on 19-21 June 2000 in Potsdam, Germany. This conference, succeeding the European Fora on Laminar Flow Technology 1992 and 1996, was initiated by the European Drag Reduction Network (DragNet) and organised by DGLR under the auspice of CEAS. The conference addressed the recent advances in all areas of drag reduction research, development, validation and demonstration including laminar flow technology, adaptive wing concepts, turbulent and induced drag reduction, separation control and supersonic flow aspects. This volume which comprises more than 40 conference papers is of particular interest to engineers, scientists and students working in the aeronautics industry, research establishments or academia.
Viscous Drag Reduction In Boundary Layers
DOWNLOAD
Author :
language : en
Publisher: AIAA
Release Date : 1990
Viscous Drag Reduction In Boundary Layers written by and has been published by AIAA this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Boundary layer categories.
Concepts For Aircraft Drag Reduction
DOWNLOAD
Author : Jerry N. Hefner
language : en
Publisher:
Release Date : 1977
Concepts For Aircraft Drag Reduction written by Jerry N. Hefner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with categories.
Advances In Effective Flow Separation Control For Aircraft Drag Reduction
DOWNLOAD
Author : Ning Qin
language : en
Publisher: Springer Nature
Release Date : 2019-10-17
Advances In Effective Flow Separation Control For Aircraft Drag Reduction written by Ning Qin and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-17 with Technology & Engineering categories.
This book presents the results of a European-Chinese collaborative research project, Manipulation of Reynolds Stress for Separation Control and Drag Reduction (MARS), including an analysis and discussion of the effects of a number of active flow control devices on the discrete dynamic components of the turbulent shear layers and Reynolds stress. From an application point of view, it provides a positive and necessary step to control individual structures that are larger in scale and lower in frequency compared to the richness of the temporal and spatial scales in turbulent separated flows.