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Analysis Of Wind Tunnel Oscillatory Data Of The X 31a Aircraft Nasa Cr 1999 208725 Mar 1 1999
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Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781723776687 Total Pages :128 pages Book Rating :4.7/5 (766 download)
Book Synopsis Analysis of Wind Tunnel Oscillatory Data of the X-31a Aircraft by : National Aeronautics and Space Adm Nasa
Download or read book Analysis of Wind Tunnel Oscillatory Data of the X-31a Aircraft written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-17 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind tunnel oscillatory tests in pitch, roll, and yaw were performed on a 19%-scale model of the X-31A aircraft. These tests were used to study the aerodynamic characteristics of the X-31A in response to harmonic oscillations at six frequencies. In-phase and out-of-phase components of the aerodynamic coefficients were obtained over a range of angles of attack from 0 to 90 deg. To account for the effect of frequency on the data, mathematical models with unsteady terms were formulated by use of two different indicial functions. Data from a reduced set of frequencies were used to estimate model parameters, including steady-state static and dynamic stability derivatives. Both models showed good prediction capability and the ability to accurately fit the measured data. Estimated static stability derivatives compared well with those obtained from static wind tunnel tests. The roll and yaw rate derivative estimates were compared with rotary-balanced wind tunnel data and theoretical predictions. The estimates and theoretical predictions were in agreement at small angles of attack. The rotary-balance data showed, in general, acceptable agreement with the steady-state derivative estimates. Smith, Mark S. Langley Research Center NCC1-24; RTOP 522-25-21-07
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721142163 Total Pages :114 pages Book Rating :4.1/5 (421 download)
Book Synopsis Analysis of Wind Tunnel Lateral Oscillatory Data of the F-16xl Aircraft by : National Aeronautics and Space Administration (NASA)
Download or read book Analysis of Wind Tunnel Lateral Oscillatory Data of the F-16xl Aircraft written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Static and dynamic wind tunnel tests were performed on an 18% scale model of the F-16XL aircraft. These tests were performed over a wide range of angles of attack and sideslip with oscillation amplitudes from 5 deg. to 30 deg. and reduced frequencies from 0.073 to 0.269. Harmonic analysis was used to estimate Fourier coefficients and in-phase and out-of-phase components. For frequency dependent data from rolling oscillations, a two-step regression method was used to obtain unsteady models (indicial functions), and derivatives due to sideslip angle, roll rate and yaw rate from in-phase and out-of-phase components. Frequency dependence was found for angles of attack between 20 deg. and 50 deg. Reduced values of coefficient of determination and increased values of fit error were found for angles of attack between 35 deg. and 45 deg. An attempt to estimate model parameters from yaw oscillations failed, probably due to the low number of test cases at different frequencies. Klein, Vladislav and Murphy, Patrick C. and Szyba, Nathan M. Langley Research Center 23-762-45-DB
Book Synopsis Analysis of Wind Tunnel Longitudinal Static and Oscillatory Data of the F-16XL Aircraft by :
Download or read book Analysis of Wind Tunnel Longitudinal Static and Oscillatory Data of the F-16XL Aircraft written by and published by . This book was released on 1997 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722237172 Total Pages :68 pages Book Rating :4.2/5 (371 download)
Book Synopsis Analysis of Wind Tunnel Longitudinal Static and Oscillatory Data of the F-16xl Aircraft by : National Aeronautics and Space Administration (NASA)
Download or read book Analysis of Wind Tunnel Longitudinal Static and Oscillatory Data of the F-16xl Aircraft written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Static and oscillatory wind tunnel data are presented for a 10-percent-scale model of an F-16XL aircraft. Static data include the effect of angle of attack, sideslip angle, and control surface deflections on aerodynamic coefficients. Dynamic data from small-amplitude oscillatory tests are presented at nominal values of angle of attack between 20 and 60 degrees. Model oscillations were performed at five frequencies from 0.6 to 2.9 Hz and one amplitude of 5 degrees. A simple harmonic analysis of the oscillatory data provided Fourier coefficients associated with the in-phase and out-of-phase components of the aerodynamic coefficients. A strong dependence of the oscillatory data on frequency led to the development of models with unsteady terms in the form of indicial functions. Two models expressing the variation of the in-phase and out-of-phase components with angle of attack and frequency were proposed and their parameters estimated from measured data. Klein, Vladislav and Murphy, Patrick C. and Curry, Timothy J. and Brandon, Jay M. Langley Research Center...
Book Synopsis Analysis of Wind Tunnel Longitudinal Static and Oscillatory Data of the F-16XL Aircraft by : Vladislav Klein
Download or read book Analysis of Wind Tunnel Longitudinal Static and Oscillatory Data of the F-16XL Aircraft written by Vladislav Klein and published by . This book was released on 1997 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Navier-Stokes, Flight, and Wind Tunnel Flow Analysis for the F/A-18 Aircraft by : Farhad Ghaffari
Download or read book Navier-Stokes, Flight, and Wind Tunnel Flow Analysis for the F/A-18 Aircraft written by Farhad Ghaffari and published by . This book was released on 1994 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind Tunnel and Propulsion Test Facilities by : Philip S. Antón
Download or read book Wind Tunnel and Propulsion Test Facilities written by Philip S. Antón and published by Minnesota Historical Society. This book was released on 2004 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Aeronautics and Space Administration's (NASA's) wind tunnel and propulsion test facilities continue to be important to U.S. competitiveness across the military, commercial, and space sectors. Unfortunately, management issues are creating real risks to these facilities. This technical report supports a companion monograph (Wind Tunnel and Propulsion Test Facilities: An Assessment of NASA's Capabilities to Serve National Needs, MG-178-NASA/OSD), providing more detailed data, observations, and conclusions about the future of NASA's wind tunnel and propulsion test facilities.
Book Synopsis Full-scale Wind-tunnel Tests of a Small Unpowered Jet Aircraft with a T-Tail by : Paul T. Soderman
Download or read book Full-scale Wind-tunnel Tests of a Small Unpowered Jet Aircraft with a T-Tail written by Paul T. Soderman and published by . This book was released on 1971 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aerodynamic characteristics of a full scale executive type jet transport aircraft with a T-tail were investigated in a 40 x 80 ft (12.2 by 24.4 meter) wind tunnel (subsonic). Static, longitudinal, and lateral stability, and control characteristics were determined at angles of attack from -2 deg to 42 deg. The aircraft wing had 13 deg of sweep and an aspect ratio of 5.02. The aircraft was tested power off with various wing leading- and trailing-edge high lift devices. The basic configuration was tested with and without such components as engine nacelles, wing tip tanks, and empannage. Hinge-moment data were obtained and downwash angles in the horizontal-tail plane location were calculated. The data were obtained at Reynolds numbers of 4.1 million and 8.7 million based on mean aerodynamic chord. The model had static longitudinal stability through initial stall. Severe tail buffet occurred near the angle of attack for maximum lift. Above initial stall the aircraft had pronounced pitch-up, characteristic of T-tail configurations. A stable trim point was possible at angles of attack between 30 deg and 40 deg (depending on c.g. location and flap setting). Hinge-moment data showed no regions with adverse effects on stick force. Comparisons of wind-tunnel data and flight-test are presented.
Book Synopsis Considerations on the Effect of Wind-tunnel Walls on Oscillating Air Forces for Two-dimensional Subsonic Compressible Flow by : Harry L. Runyan
Download or read book Considerations on the Effect of Wind-tunnel Walls on Oscillating Air Forces for Two-dimensional Subsonic Compressible Flow written by Harry L. Runyan and published by . This book was released on 1951 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper treats the effect of wind-tunnel walls on the oscillating two-dimensional air forces in a compressible medium. The walls are simulated by the usual method of placing impages at appropriate distances above and below the wing. An important result shown is that, for certain conditions of wing frequency, tunnel height, and Mach number, the tunnel and wing may form a resonant system so that the forces on the wing are greatly changed from the condition of no tunnel walls.
Book Synopsis Acquisition and utilization of wind tunnels by the National Aeronautics and Space Administration by : United States. General Accounting Office
Download or read book Acquisition and utilization of wind tunnels by the National Aeronautics and Space Administration written by United States. General Accounting Office and published by . This book was released on 1976 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781723853821 Total Pages :68 pages Book Rating :4.8/5 (538 download)
Book Synopsis Investigation of a Technique for Measuring Dynamic Ground Effect in a Subsonic Wind Tunnel by : National Aeronautics and Space Adm Nasa
Download or read book Investigation of a Technique for Measuring Dynamic Ground Effect in a Subsonic Wind Tunnel written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-20 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: To better understand the ground effect encountered by slender wing supersonic transport aircraft, a test was conducted at NASA Langley Research Center's 14 x 22 foot Subsonic Wind Tunnel in October, 1997. Emphasis was placed on improving the accuracy of the ground effect data by using a "dynamic" technique in which the model's vertical motion was varied automatically during wind-on testing. This report describes and evaluates different aspects of the dynamic method utilized for obtaining ground effect data in this test. The method for acquiring and processing time data from a dynamic ground effect wind tunnel test is outlined with details of the overall data acquisition system and software used for the data analysis. The removal of inertial loads due to sting motion and the support dynamics in the balance force and moment data measurements of the aerodynamic forces on the model is described. An evaluation of the results identifies problem areas providing recommendations for future experiments. Test results are validated by comparing test data for an elliptical wing planform with an Elliptical wing planform section with a NACA 0012 airfoil to results found in current literature. Major aerodynamic forces acting on the model in terms of lift curves for determining ground effect are presented. Comparisons of flight and wind tunnel data for the TU-144 are presented.Graves, Sharon S.Langley Research CenterGROUND EFFECT (AERODYNAMICS); AERODYNAMIC FORCES; SUBSONIC WIND TUNNELS; WIND TUNNEL TESTS; DATA ACQUISITION; AIRCRAFT DESIGN; AERODYNAMIC CONFIGURATIONS; AIRCRAFT CONFIGURATIONS; SLENDER WINGS; WING PLANFORMS; SUPERSONIC TRANSPORTS; TU-144 AIRCRAFT; VERTICAL MOTION
Book Synopsis Wind Tunnels and Experimental Fluid Dynamics Research by : Jorge Colman Lerner
Download or read book Wind Tunnels and Experimental Fluid Dynamics Research written by Jorge Colman Lerner and published by BoD – Books on Demand. This book was released on 2011-07-27 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Wind Tunnels and Experimental Fluid Dynamics Research" is comprised of 33 chapters divided in five sections. The first 12 chapters discuss wind tunnel facilities and experiments in incompressible flow, while the next seven chapters deal with building dynamics, flow control and fluid mechanics. Third section of the book is dedicated to chapters discussing aerodynamic field measurements and real full scale analysis (chapters 20-22). Chapters in the last two sections deal with turbulent structure analysis (chapters 23-25) and wind tunnels in compressible flow (chapters 26-33). Contributions from a large number of international experts make this publication a highly valuable resource in wind tunnels and fluid dynamics field of research.
Book Synopsis Drag of a Supercritical Body of Revolution in Free Flight at Transonic Speeds and Comparison with Wind-tunnel Data by : J. W. Usry
Download or read book Drag of a Supercritical Body of Revolution in Free Flight at Transonic Speeds and Comparison with Wind-tunnel Data written by J. W. Usry and published by . This book was released on 1971 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Low-Speed Wind Tunnel Testing by : Alan Pope
Download or read book Low-Speed Wind Tunnel Testing written by Alan Pope and published by Wiley-Interscience. This book was released on 1984 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Good,No Highlights,No Markup,all pages are intact, Slight Shelfwear,may have the corners slightly dented, may have slight color changes/slightly damaged spine.
Book Synopsis A Rigidly Forced Oscillation System for Meaasuring Dynamic-stability Parameters in Transonic and Supersonic Wind Tunnels by : Albert L. Braslow
Download or read book A Rigidly Forced Oscillation System for Meaasuring Dynamic-stability Parameters in Transonic and Supersonic Wind Tunnels written by Albert L. Braslow and published by . This book was released on 1962 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of X-31 Flight and Ground-based Yawing Moment Asymmetries at High Angles of Attack by : Brent R. Cobleigh
Download or read book Comparison of X-31 Flight and Ground-based Yawing Moment Asymmetries at High Angles of Attack written by Brent R. Cobleigh and published by . This book was released on 2001 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781723862748 Total Pages :54 pages Book Rating :4.8/5 (627 download)
Book Synopsis NASA Glenn 1-By 1-Foot Supersonic Wind Tunnel User Manual by : National Aeronautics and Space Adm Nasa
Download or read book NASA Glenn 1-By 1-Foot Supersonic Wind Tunnel User Manual written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-20 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual describes the NASA Glenn Research Center's 1 - by 1 -Foot Supersonic Wind Tunnel and provides information for customers who wish to conduct experiments in this facility. Tunnel performance envelopes of total pressure, total temperature, and dynamic pressure as a function of test section Mach number are presented. For each Mach number, maps are presented of Reynolds number per foot as a function of the total air temperature at the test section inlet for constant total air pressure at the inlet. General support systems-such as the service air, combustion air, altitude exhaust system, auxiliary bleed system, model hydraulic system, schlieren system, model pressure-sensitive paint, and laser sheet system are discussed. In addition, instrumentation and data processing, acquisition systems are described, pretest meeting formats and schedules are outlined, and customer responsibilities and personnel safety are addressed.Seablom, Kirk D. and Soeder, Ronald H. and Stark, David E. and Leone, John F. X. and Henry, Michael W.Glenn Research CenterMACH NUMBER; REYNOLDS NUMBER; SUPERSONIC WIND TUNNELS; SUPERSONIC FLOW; TEST CHAMBERS; DATA ACQUISITION; MANUALS; WIND TUNNEL NOZZLES; DYNAMIC PRESSURE; WIND TUNNEL TESTS
