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Book Synopsis Modeling of longitudinal unsteady aerodynamics of a wingtail combination by :
Download or read book Modeling of longitudinal unsteady aerodynamics of a wingtail combination written by . This book was released on . Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Release : 2018-06-03
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Book Rating : 061/5 ( reviews)
Book Synopsis Modeling of Longitudinal Unsteady Aerodynamics of a Wing-Tail Combination by : National Aeronautics and Space Administration (NASA)
Download or read book Modeling of Longitudinal Unsteady Aerodynamics of a Wing-Tail Combination written by National Aeronautics and Space Administration (NASA). This book was released on 2018-06-03. Available in PDF, EPUB and Kindle. Book excerpt: Aerodynamic equations for the longitudinal motion of an aircraft with a horizontal tail were developed. In this development emphasis was given on obtaining model structure suitable for model identification from experimental data. The resulting aerodynamic models included unsteady effects in the form of linear indicial functions. These functions represented responses in the lift on the wing and tail alone, and interference between those two lifting surfaces. The effect of the wing on the tail was formulated for two different expressions concerning the downwash angle at the tail. The first expression used the Cowley-Glauert approximation known-as "lag-in-downwash," the second took into account growth of the wing circulation and delay in the development of the lift on the tail. Both approaches were demonstrated in two examples using the geometry of a fighter aircraft and a large transport. It was shown that the differences in the two downwash formulations would increase for an aircraft with long tail arm performing low-speed, rapid maneuvers.Klein, VladislavLangley Research CenterUNSTEADY AERODYNAMICS; AERODYNAMIC CHARACTERISTICS; AERODYNAMIC STABILITY; LONGITUDINAL STABILITY; LIFT; PITCHING MOMENTS; WIND TUNNEL TESTS; BODY-WING AND TAIL CONFIGURATIONS; WINGS; TAIL ASSEMBLIES; DOWNWASH; FIGHTER AIRCRAFT
Author : Vladislav Klein
Release : 1999
Genre : Airplanes
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Book Synopsis Modeling of Longitudinal Unsteady Aerodynamics of a Wing-Tail Combination by : Vladislav Klein
Download or read book Modeling of Longitudinal Unsteady Aerodynamics of a Wing-Tail Combination written by Vladislav Klein. This book was released on 1999. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Release : 2003
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Book Synopsis Aerodynamic Loading on Manoeuvring Aircraft by :
Download or read book Aerodynamic Loading on Manoeuvring Aircraft written by . This book was released on 2003. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jack Morito (II)
Release : 1972
Genre : Aerodynamic load
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Book Synopsis Prediction of Unsteady Aerodynamic Loadings on Non-planar Wings and Wing-tail Configurations in Supersonic Flow by : Jack Morito (II)
Download or read book Prediction of Unsteady Aerodynamic Loadings on Non-planar Wings and Wing-tail Configurations in Supersonic Flow written by Jack Morito (II). This book was released on 1972. Available in PDF, EPUB and Kindle. Book excerpt: A three-dimensional extension of the Mach Box technique was developed for the unsteady aerodynamic analysis of non-planar wings and wing-tail configurations in supersonic flow. Various refinement procedures were included to improve the accuracy of the results. A general purpose computer program was written for the CDC 6600. The program is capable of treating wing-tail combinations with or without vertical separation, longitudinal separation and dihedral on either surface. If a wing alone is treated, perturbation velocity components in the flow field may be found. Correlations with experimental flutter results were performed for several models tested in the low supersonic Mach number range. The methods are intended to be used by airplane designers to calculate with improved accuracy, the unsteady aerodynamic loads that act on a lifting surface being propelled at supersonic speeds. The new feature of these calculations is that the aerodynamic interference between the wing and tail was taken into account. These calculations are an essential ingredient of flutter analyses and will improve the confidence level of such calculations in preventing wing-tail flutter.
