Analysis of Wind Tunnel Longitudinal Static and Oscillatory Data of the F-16XL Aircraft PDF Download
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Author:
Publisher:
ISBN:
Category : Oscillations
Languages : en
Pages : 70
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Author:
Publisher:
ISBN:
Category : Oscillations
Languages : en
Pages : 70
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Author: Mark S. Smith
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 130
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Author: Vladislav Klein
Publisher:
ISBN:
Category :
Languages : en
Pages : 68
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721142163
Category :
Languages : en
Pages : 114
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Book Description
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
Author: National Aeronautics and Space Adm Nasa
Publisher:
ISBN: 9781730729645
Category :
Languages : en
Pages : 70
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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...
Author:
Publisher: DIANE Publishing
ISBN: 1428996788
Category :
Languages : en
Pages : 29
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Author:
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ISBN:
Category : Astronautics
Languages : en
Pages : 182
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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 854
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Author: E.E. Gdoutos
Publisher: Springer Science & Business Media
ISBN: 0306484102
Category : Science
Languages : en
Pages : 798
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Book Description
This book contains 71 papers presented at the symposium on “Recent Advances in Experimental Mechanics” which was organized in honor of Professor Isaac M. Daniel. The symposium took place at Virginia Polytechnic Institute and State University on th June 23-28, 2002, in conjunction with the 14 US National Congress of Applied Mechanics. The book is a tribute to Isaac Daniel, a pioneer of experimental mechanics and composite materials, in recognition of his continuous, original, diversified and outstanding contributions for half a century. The book consists of invited papers written by leading experts in the field. It contains original contributions concerning the latest developments in experimental mechanics. It covers a wide range of subjects, including optical methods of stress analysis (photoelasticity, moiré, etc.), composite materials, sandwich construction, fracture mechanics, fatigue and damage, nondestructive evaluation, dynamic problems, fiber optic sensors, speckle metrology, digital image processing, nanotechnology, neutron diffraction and synchrotron radiation methods. The papers are arranged in the following nine sections: Mechanical characterization of material behavior, composite materials, fracture and fatigue, optical methods, n- destructive evaluation, neutron diffraction and synchrotron radiation methods, hybrid methods, composite structures, and structural testing and analysis.
Author: Vladislav Klein
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 32
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