Turbulent NavierStokes flow analysis of an advanced semispan diamondwing model in tunnel and free air at highlift conditions PDF Download
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Author:
Publisher: DIANE Publishing
ISBN: 1428995617
Category :
Languages : en
Pages : 39
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Book Description
Author:
Publisher: DIANE Publishing
ISBN: 1428995617
Category :
Languages : en
Pages : 39
Get Book Here
Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721032778
Category :
Languages : en
Pages : 40
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Book Description
Turbulent Navier-Stokes computational results are presented for an advanced diamond wing semispan model at low-speed, high-lift conditions. The numerical results are obtained in support of a wind-tunnel test that was conducted in the National Transonic Facility at the NASA Langley Research Center. The model incorporated a generic fuselage and was mounted on the tunnel sidewall using a constant-width non-metric standoff. The computations were performed at to a nominal approach and landing flow conditions.The computed high-lift flow characteristics for the model in both the tunnel and in free-air environment are presented. The computed wing pressure distributions agreed well with the measured data and they both indicated a small effect due to the tunnel wall interference effects. However, the wall interference effects were found to be relatively more pronounced in the measured and the computed lift, drag and pitching moment. Although the magnitudes of the computed forces and moment were slightly off compared to the measured data, the increments due the wall interference effects were predicted reasonably well. The numerical results are also presented on the combined effects of the tunnel sidewall boundary layer and the standoff geometry on the fuselage forebody pressure distributions and the resulting impact on the configuration longitudinal aerodynamic characteristics.Ghaffari, Farhad and Biedron, Robert T. and Luckring, James M.Langley Research CenterNAVIER-STOKES EQUATION; SEMISPAN MODELS; TURBULENT FLOW; WIND TUNNEL TESTS; LIFT; LOW ASPECT RATIO WINGS; COMPUTATIONAL FLUID DYNAMICS; AERODYNAMIC CHARACTERISTICS; WALL FLOW; FUSELAGES; AERODYNAMIC INTERFERENCE; PITCHING MOMENTS; PRESSURE DISTRIBUTION; FOREBODIES
Author:
Publisher:
ISBN:
Category : Air-supported structures
Languages : en
Pages : 24
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Book Description
A small-scale, instrumented research aircraft was flown to investigate the flight characteristics of inflatable wings. Ground tests measured the static structural characteristics of the wing at different inflation pressures, and these results compared favorably with analytical predictions. A research-quality instrumentation system was assembled, largely from commercial off-the-shelf components, and installed in the aircraft. Initial flight operations were conducted with a conventional rigid wing having the same dimensions as the inflatable wing. Subsequent flights were conducted with the inflatable wing. Research maneuvers were executed to identify the trim, aerodynamic performance, and longitudinal stability and control characteristics of the vehicle in its different wing configurations. For the angle-of-attack range spanned in this flight program.
Author: Joseph R. Chambers
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 406
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Book Description
Author: E. Torenbeek
Publisher: Springer Science & Business Media
ISBN: 1402086644
Category : Technology & Engineering
Languages : en
Pages : 540
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Book Description
Knowledge is not merely everything we have come to know, but also ideas we have pondered long enough to know in which way they are related, and 1 how these ideas can be put to practical use. Modern aviation has been made possible as a result of much scienti c - search. However, the very rst useful results of this research became ava- able a considerable length of time after the aviation pioneers had made their rst ights. Apparently, researchers were not able to nd an adequate exp- nation for the occurrence of lift until the beginning of the 21st century. Also, for the fundamentals of stability and control, there was no theory available that the pioneers could rely on. Only after the rst motorized ights had been successfully made did researchers become more interested in the science of aviation, which from then on began to take shape. In modern day life, many millions of passengers are transported every year by air. People in the western societies take to the skies, on average, several times a year. Especially in areas surrounding busy airports, travel by plane has been on the rise since the end of the Second World War. Despite becoming familiar with the sight of a jumbo jet commencing its ight once or twice a day, many nd it astonishing that such a colossus with a mass of several hundred thousands of kilograms can actually lift off from the ground.
Author: Gary A. Flandro
Publisher: Cambridge University Press
ISBN: 1139498614
Category : Technology & Engineering
Languages : en
Pages : 433
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Book Description
In the rapidly advancing field of flight aerodynamics, it is especially important for students to master the fundamentals. This text, written by renowned experts, clearly presents the basic concepts of underlying aerodynamic prediction methodology. These concepts are closely linked to physical principles so that they are more readily retained and their limits of applicability are fully appreciated. Ultimately, this will provide students with the necessary tools to confidently approach and solve practical flight vehicle design problems of current and future interest. This book is designed for use in courses on aerodynamics at an advanced undergraduate or graduate level. A comprehensive set of exercise problems is included at the end of each chapter.
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 966
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Book Description
Author: Paul K. Chang
Publisher: Elsevier
ISBN: 1483181286
Category : Technology & Engineering
Languages : en
Pages : 800
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Book Description
Interdisciplinary and Advanced Topics in Science and Engineering, Volume 3: Separation of Flow presents the problem of the separation of fluid flow. This book provides information covering the fields of basic physical processes, analyses, and experiments concerning flow separation. Organized into 12 chapters, this volume begins with an overview of the flow separation on the body surface as discusses in various classical examples. This text then examines the analytical and experimental results of the laminar boundary layer of steady, two-dimensional flows in the subsonic speed range. Other chapters consider the study of flow separation on the two-dimensional body, flow separation on three-dimensional body shape and particularly on bodies of revolution. This book discusses as well the analytical solutions of the unsteady flow separation. The final chapter deals with the purpose of separation flow control to raise efficiency or to enhance the performance of vehicles and fluid machineries involving various engineering applications. This book is a valuable resource for engineers.
Author: Maureen B. Tracy
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 84
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Book Description
Author: Theodore Von Kármán
Publisher: Courier Corporation
ISBN: 9780486434858
Category : Technology & Engineering
Languages : en
Pages : 226
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Book Description
Charming, reader-friendly chronicle by a famous pioneer in aerodynamic research traces the development of dynamic flight from the time of Newton through the 20th century. It recounts struggles of engineers and physicists with problems associated with lift, drag, stability, aeroelasticity, and the sound barrier. 72 figures. 1957 edition.
