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Forebody Flow Visualization On The F 18 Harv With Acuated Forebody Strakes Nasa Tm 1998 206556 Oct 27 1998
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Author :A. G. Panaras Publisher :AIAA (American Institute of Aeronautics & Astronautics) ISBN 13 :9781600869167 Total Pages :0 pages Book Rating :4.8/5 (691 download)
Book Synopsis Aerodynamic Principles of Flight Vehicles by : A. G. Panaras
Download or read book Aerodynamic Principles of Flight Vehicles written by A. G. Panaras and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In "Aerodynamic Principles of Flight Vehicles" Argyris Panaras examines the fundamentals of vortices and shock waves, aerodynamic estimation of lift and drag, airfoil theory, boundary layer control, and high-speed, high-temperature flow. Individual chapters address vortices in aerodynamics, transonic and supersonic flows, transonic/supersonic aircraft configurations, and high-supersonic/hypersonic flows, beginning with definitions and historical data, and then describing present-day status and current research challenges. Emphasis is given to flow control, to the evolution of flight vehicle shapes as flight speed has increased, and to discoveries that enabled breakthrough developments in flight. The book: examines why various equations and technologies were developed, explains major contributors in areas such as vortices and aircraft wakes, drag buildup, sonic boom, and shock wave-boundary layer interactions, among others, and helps readers apply concepts from the material to their own projects. Archival and encyclopedic, "Aerodynamic Principles of Flight Vehicles" is a superb reference for aeronautical students and professionals alike. Although most beneficial to readers with a working knowledge of aerodynamics, it is accessible to anyone with an introductory understanding of the field.
Book Synopsis Flight-Determined Subsonic Longitudinal Stability and Control Derivatives of the F-18 High Angle of Attack Research Vehicle (HARV) with Thrust Vectoring by : Kenneth W. Iliff
Download or read book Flight-Determined Subsonic Longitudinal Stability and Control Derivatives of the F-18 High Angle of Attack Research Vehicle (HARV) with Thrust Vectoring written by Kenneth W. Iliff and published by . This book was released on 1997 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Blazing the Trail by : Mike Gruntman
Download or read book Blazing the Trail written by Mike Gruntman and published by AIAA. This book was released on 2004 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Winner of the Luigi Napolitano Award (2006) from the International Academy of Astronautics This book presents the fascinating story of the events that paved the way to space. It introduces the reader to the history of early rocketry and the subsequent developments that led into the space age. People of various nations and from various lands contributed to the breakthrough to space, and the book takes the reader to faraway places on five continents. It also includes many quotes to give readers a flavor of how the participants viewed the developments. Most publications on the topic either target narrow aspects of rocket history or are popular books that scratch the surface, with minimal and sometimes inaccurate technical details. This book bridges the gap. It contains numerous technical details usually unavailable in popular publications. The details are not overbearing and anyone interested in rocketry and space exploration will navigate through the book without difficulty. There are 340 figures and photographs, many appearing for the first time.
Book Synopsis Forebody Flow Visualization on the F-18 HARV with Actuated Forebody Strakes by : David F. Fisher
Download or read book Forebody Flow Visualization on the F-18 HARV with Actuated Forebody Strakes written by David F. Fisher and published by . This book was released on 1998 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Off-surface smoke flow visualization and extensive pressure measurements were obtained on the forebody of the NASA F-18 High Alpha Research Vehicle equipped with actuated forebody strakes. Test points at [alpha]=50 deg. were examined in which only one strake was deflected or in which both strakes were deflected differentially. The forebody pressures were integrated to obtain forebody yawing moments. Results showed that small single strake deflections can cause an undesirable yawing moment reversal. At [alpha]=50 deg., this reversal was corrected by deploying both strakes at 20 deg. initially, then differentially from 20 deg. to create a yawing moment. The off-surface flow visualization showed that in the case of the small single strake deflection, the resulting forebody/strake vortex remained close to the surface and caused accelerated flow and increased suction pressures on the deflected side. When both strakes were deflected differentially, two forebody/strake vortices were present. The forebody/strake vortex from the larger deflection would lift from the surface while the other would remain close to the surface. The nearer forebody/strake vortex would cause greater flow acceleration, higher suction pressures and a yawing moment on that side ot the forebody. Flow visualization provided clear description of the strake vortices fluid mechanics.
Book Synopsis Vortex Methods and Vortex Motion by : Karl E. Gustafson
Download or read book Vortex Methods and Vortex Motion written by Karl E. Gustafson and published by SIAM. This book was released on 1991-01-01 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex methods have emerged as a new class of powerful numerical techniques to analyze and compute vortex motion. This book addresses the theoretical, numerical, computational, and physical aspects of vortex methods and vortex motion.
Author :United States. Congress. House. Committee on Science and Technology. Subcommittee on Transportation, Aviation, and Materials Publisher : ISBN 13 : Total Pages :196 pages Book Rating :4.3/5 (121 download)
Book Synopsis High Speed Aeronautics by : United States. Congress. House. Committee on Science and Technology. Subcommittee on Transportation, Aviation, and Materials
Download or read book High Speed Aeronautics written by United States. Congress. House. Committee on Science and Technology. Subcommittee on Transportation, Aviation, and Materials and published by . This book was released on 1985 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Fluid Dynamics written by N. Curle and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Aerodynamic Design of Aircraft by : Dietrich Küchemann
Download or read book The Aerodynamic Design of Aircraft written by Dietrich Küchemann and published by AIAA Education. This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dietrich Kuchemann's The Aerodynamic Design of Aircraft is as relevant and as forward looking today as it was when it was first published in 1978. It comprises the philosophy and life's work of a unique and visionary intellect. Based upon material taught in a course at Imperial College London, the insight and intuition conveyed by this text are timeless. With its republication, Kuchemann's influence will extend to the next generation of aerospace industry students and practitioners and the vehicles they will produce. Kuchemann establishes three classes of aircraft based on the character of flow involved. Each class is suitable for a distinct cruise speed regime: classical and swept aircraft for subsonic and transonic cruise, slender-wing aircraft for supersonic cruise, and wave-rider aircraft for hypersonic cruise. Unlike most engineering texts, which focus on a set of tools, Kuchemann's approach is to focus on the problem and its solution - what kind of flow is best for a given class of aircraft and how to achieve it.With this approach, Kuchemann fully embraces the true inverse nature of design; rather than answer what flow given the shape, he strives to answer what flow given the purpose and then what shape given the flow.
Download or read book Progress in Aerospace Sciences written by and published by . This book was released on 1975 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723577345 Total Pages :222 pages Book Rating :4.5/5 (773 download)
Book Synopsis F/A-18 Forebody Vortex Control. Volume 2 by : National Aeronautics and Space Administration (NASA)
Download or read book F/A-18 Forebody Vortex Control. Volume 2 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-24 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: A rotary-balance wind tunnel test was conducted on a six percent model of the F/A-18 at the NASA Ames 7 X 10-Foot Low Speed Wind Tunnel. The data reduction was specially written for the test in National Instruments' LabVIEW. The data acquisition, reduction and analysis was performed with a Macintosh computer. The primary objective of the test was to evaluate the effectiveness of several forebody vortex control configurations in a rotary flow field. The devices that were found to be the most effective during the static tests (Volume 1) were investigated and included both mechanical and pneumatic configurations. The mechanical systems evaluated were small, single and dual, rotating nose tip strakes and a vertical nose strake. The jet blowing configuration used nozzles canted inboard 60 degrees. A two segment tangential slot was also evaluated. The different techniques were evaluated at angles of attack of 30 degrees, 45 degrees, 51 degrees, and 60 degrees. Sideslip and Reynolds number were varied for some of the configurations. All of the techniques proved to be effective in the rotating flow field. The vertical nose strake had the largest 'envelope' of effectiveness. Forebody vortex control provides large, robust yawing moments at medium to high angles of attack, even during combat maneuvers such as loaded roll. Kramer, Brian R. and Suarez, Carlos J. and Malcolm, Gerald N. and Ayers, Bert F. Unspecified Center NASA-CR-4582-VOL-2, A-94055-VOL-2, NAS 1.26:4582-VOL-2 NAS2-13383...
Book Synopsis Physics of Forebody Flow Control by : National Aeronaut Administration (Nasa)
Download or read book Physics of Forebody Flow Control written by National Aeronaut Administration (Nasa) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-10 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance in the high angle of attack regime is required by many different types of aircraft. Military aircraft, such as fighters, utilize flight in this regime to improve maneuverability. Civilian aircraft, such as supersonic or hypersonic transports, will also need to operate in this regime during take off and landing, due to their small highly swept wings. Flight at high angles of attack is problematic due to the vortices being created on the nose of the aircraft. The vortices tend to become asymmetric and produce side forces. At the same time, the rudders are less effective because they are becoming immersed in the flow separating from the wings and fuselage. Consequently, the side force produced by the vortices on the nose tend to destabilize the aircraft. This situation may be corrected through the use of a forebody flow control system such as tangential slot blowing. In this concept, a jet is blown from the nose in an effort to alter the flow field around the nose and diminish the destabilizing side force. Alternately, the jet may be used to create a side force which could be used to augment the rudders. This would allow the size of the rudders to be decreased which would, in turn, diminish the cruise drag. Therefore, the use of a tangential slot blowing system has the potential for improving both the maneuver performance and the cruise performance of an aircraft. The present study was conducted to explore the physics of forebody flow control. The study consisted of two major thrusts: (1) exploration of forebody flow control with tangential slot blowing; (2) investigation of flow and field response to a general perturbation. Font, Gabriel I. Unspecified Center...
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723486753 Total Pages :130 pages Book Rating :4.4/5 (867 download)
Book Synopsis Water Tunnel Flow Visualization Study Through Poststall of 12 Novel Planform Shapes by : National Aeronautics and Space Administration (NASA)
Download or read book Water Tunnel Flow Visualization Study Through Poststall of 12 Novel Planform Shapes written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-23 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: To determine the flow field characteristics of 12 planform geometries, a flow visualization investigation was conducted in the Langley 16- by 24-Inch Water Tunnel. Concepts studied included flat plate representations of diamond wings, twin bodies, double wings, cutout wing configurations, and serrated forebodies. The off-surface flow patterns were identified by injecting colored dyes from the model surface into the free-stream flow. These dyes generally were injected so that the localized vortical flow patterns were visualized. Photographs were obtained for angles of attack ranging from 10' to 50', and all investigations were conducted at a test section speed of 0.25 ft per sec. Results from the investigation indicate that the formation of strong vortices on highly swept forebodies can improve poststall lift characteristics; however, the asymmetric bursting of these vortices could produce substantial control problems. A wing cutout was found to significantly alter the position of the forebody vortex on the wing by shifting the vortex inboard. Serrated forebodies were found to effectively generate multiple vortices over the configuration. Vortices from 65' swept forebody serrations tended to roll together, while vortices from 40' swept serrations were more effective in generating additional lift caused by their more independent nature. Gatlin, Gregory M. and Neuhart, Dan H. Langley Research Center WATER TUNNEL TESTS; FLOW VISUALIZATION; FLOW DISTRIBUTION; FREE FLOW; PLANFORMS; WING PROFILES; AERODYNAMIC CONFIGURATIONS; ANGLE OF ATTACK; ROLL; DYES; FLAT PLATES; FOREBODIES...
