Special Course on Skin Friction Drag Reduction Held in Rhode-St-Genese, Belgium on 2-6 March 1992 (Reduction de Trainee de Frottement).

Special Course on Skin Friction Drag Reduction Held in Rhode-St-Genese, Belgium on 2-6 March 1992 (Reduction de Trainee de Frottement).
Author:
Publisher:
Total Pages: 287
Release: 1992
Genre:
ISBN:
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Lecture notes for the AGARD Fluid Dynamics Panel (FDP) Special Course on Skin Friction Drag Reduction have been assembled in this report. The aim and scope of this Course was to provide an overview of the state of the art of current technology programmes focused on reducing aircraft drag caused by skin friction. This Course is complementary and provides an update to topics reported in two previous FDP Special Courses held in 1977 and 1985. This report provides a review of recent progress in the field of skin friction drag reduction for transport aircraft. It provides a general introduction to the technology and then focuses on two specific aspects of drag reduction: maintaining laminar flow by controlling transition and manipulating the turbulence structure in boundary layers to help reduce skin friction. Technology associated with the use of riblets, LEBU, polymers, additives, etc., is also reviewed. The material assembled in this report was prepared under the combined sponsorship of the AGARD Fluid Dynamics Panel, the Consultant and Exchange Programme of AGARD, and the von Karman Institute (VKI) for Fluid Dynamics. Aerodynamic drag, Drag reducing agents, Skin friction, Laminar flow, Transport aircraft, Boundary layer control.

Special Course on Concepts for Drag Reduction

Special Course on Concepts for Drag Reduction
Author: ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT PARIS (France)
Publisher:
Total Pages: 297
Release: 1977
Genre:
ISBN:
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A growing research effort is being mounted in a number of countries into investigations of ideas for drag reduction, some novel and some that were looked at in the past but were not then pursued to the point of application because the economic facts of life were different from and less pressing than they are now. These ideas include means for reducing skin friction drag (e.g. compliant walls, boundary layer control, etc.), induced drag (e.g. winglets), interference drag, transonic shock wave drag (supercritical wings) and supersonic wave drag. In addition the internal aerodynamics of ducting, especially diffusers is receiving attention to improve the performance of engines.

Transition, Turbulence and Combustion Modelling

Transition, Turbulence and Combustion Modelling
Author: A. Hanifi
Publisher: Springer Science & Business Media
Total Pages: 540
Release: 2012-12-06
Genre: Science
ISBN: 9401145156
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This single-volume work gives an introduction to the fields of transition, turbulence, and combustion modeling of compressible flows and provides the physical background for today’s modeling approaches in these fields. It presents basic equations and discusses fundamental aspects of hydrodynamical instability.

Skin-friction Drag Reduction in Laminar and Turbulent Boundary Layers

Skin-friction Drag Reduction in Laminar and Turbulent Boundary Layers
Author: Sung Moon Kang
Publisher:
Total Pages: 320
Release: 2006
Genre:
ISBN: 9780542796845
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This linear model was used to develop reduced-order linear-quadratic-Gaussian (LQG) controllers. While these controls could achieve significant drag reduction, they appeared to be a performance limit. However, they could induce transient sublaminar drag under certain conditions. A nonlinear minimization using full-order nonlinear simulations was attempted to capture this transient behavior on a periodic basis. The upstream traveling wave was discovered in the course of that study.