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Prediction of Lateral Aerodynamic Loads on Fighter Aircraft at High Angles of Attack

Prediction of Lateral Aerodynamic Loads on Fighter Aircraft at High Angles of Attack
Author: S. B. Spangler
Publisher:
Total Pages: 84
Release: 1978
Genre:
ISBN:

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This report presents a brief summary of methods and experimental data developed over a four year period to predict the static lateral forces acting on a modern fighter-type aircraft at high angles of attack and small angles of sideslip characteristic of a departure flight attitude. The major part of the report is devoted to application of the methods to two aircraft configurations on which detailed data exist, comparison of the predicted and measured results, and evaluation of the comparisons. The configurations are a research V/STOL fighter configuration and the F-5 aircraft. Comparisons are made on nose vortex positions, circulation distributions in the separated region above the nose, flow velocities in the same region, and loads on the nose alone and complete configuration. Generally, the methods predict all of the correct behavior of these highly nonlinear and complicated flows. However, the agreement in many cases is not sufficiently good to consider the methods as satisfactory design or analysis techniques. Additional work is suggested to provide further verification and improvements.


Low-Speed Aerodynamics

Low-Speed Aerodynamics
Author: Joseph Katz
Publisher: Cambridge University Press
Total Pages: 636
Release: 2001-02-05
Genre: Technology & Engineering
ISBN: 1107717426

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Low-speed aerodynamics is important in the design and operation of aircraft flying at low Mach number, and ground and marine vehicles. This 2001 book offers a modern treatment of the subject, both the theory of inviscid, incompressible, and irrotational aerodynamics and the computational techniques now available to solve complex problems. A unique feature of the text is that the computational approach (from a single vortex element to a three-dimensional panel formulation) is interwoven throughout. Thus, the reader can learn about classical methods of the past, while also learning how to use numerical methods to solve real-world aerodynamic problems. This second edition has a new chapter on the laminar boundary layer (emphasis on the viscous-inviscid coupling), the latest versions of computational techniques, and additional coverage of interaction problems. It includes a systematic treatment of two-dimensional panel methods and a detailed presentation of computational techniques for three-dimensional and unsteady flows. With extensive illustrations and examples, this book will be useful for senior and beginning graduate-level courses, as well as a helpful reference tool for practising engineers.


V/STOL Aircraft Aerodynamic Prediction Methods Investigation

V/STOL Aircraft Aerodynamic Prediction Methods Investigation
Author: Peter T. Wooler
Publisher:
Total Pages: 422
Release: 1972
Genre: Computer programs
ISBN:

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Analytical engineering methods are developed for use in predicting the static and dynamic stability and control derivatives and force and moment coefficients of lift-jet, lift-fan, and vectored thrust V/STOL aircraft in the hover and transition flight regimes. The aircraft configurations studies have a conventional wing, fuselage and empennage. The prediction methods are suitable for use by design personnel during the preliminary design and evaluation of V/STOL aircraft of the type previously mentioned. Details and listings of the computer programs associated with the prediction methods are given in the volume.


V/STOL Aircraft Aerodynamic Prediction Methods Investigation

V/STOL Aircraft Aerodynamic Prediction Methods Investigation
Author: Peter T. Wooler
Publisher:
Total Pages: 480
Release: 1972
Genre: Mathematical models
ISBN:

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Analytical engineering methods are developed for use in predicting the static and dynamic stability and control derivatives and force and moment coefficients of lift-jet, lift-fan, and vectored thrust V/STOL aircraft in the hover and transition flight regimes. The methods take into account the strong power effects, large variations in angle of attack and sideslip, and changes in aircraft geometry that are associated with high disk loaded V/STOL aircraft operating in the aforementioned flight regimes. The theoretical development of the prediction methods is presented in this volume.


V/STOL Aircraft Aerodynamic Prediction Methods Investigation

V/STOL Aircraft Aerodynamic Prediction Methods Investigation
Author: Peter T. Wooler
Publisher:
Total Pages: 504
Release: 1972
Genre: Mathematical models
ISBN:

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Volume 2. Application of Prediction Methods. Final rept. 1 May 69-31 Jan 1972, FWooler, Peter T. ;Kao, Hsiao C. ;Schwendemann, Myles F. ;Wasson, Howard R. ;Ziegler, Henry ;NOR-72-9-Vol-2F33615-69-C-1602AF-698BTAFFDLTR-72-26- Vol-2See also Volume 1, AD752557 and Volume 3, AD752559.(*aerodynamic characteristics, mathematical prediction), (*short takeoff aircraft, aerodynamic characteristics), vertical takeoff aircraft, flow fields, lift, predictions, flow separation, vortices, wake, stalling, interactions, mathematical models, mapping(transformations)computer aided analysis, computer aided design, design criteriaAnalytical engineering methods are developed for use in predicting the static and dynamic stability and control derivatives and force and moment coefficients of lift-jet, lift-fan, and vectored thrust V/STOL aircraft in the hover and transition flight regimes. The aircraft configurations studied have a conventional wing, fuselage and empennage. The prediction methods are applied to a number of V/STOL configurations in this volume.