Accession Number : ADP006964

Title :   Basic Concepts on Boundary Layers,

Corporate Author : OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES TOULOUSE (FRANCE)

Personal Author(s) : Cousteix, Jean

Report Date : MAR 1992

Pagination or Media Count : 39

Abstract : Since man has been trying to fly, a war against drag been engaged. At the present time, drag reduction is an industrial challenge in Aeronautics which justifies the efforts devoted to this topic. One facet of these efforts deals with the skin-friction drag reduction. Two directions are followed. The first one is the manipulation of turbulent boundary layers. By altering the formation of turbulence or by modifying its characteristics it is hoped to decrease the turbulent skin-friction. The second direction concerns the action on laminar-turbulent transition. By delaying the occurrence of the turbulent regime enormous skin friction reductions are possible. This Lecture Series on Skin-Friction Drag Reduction is aimed at giving an overview of the state of the art on the various means which are being studied to obtain significant gains.

Descriptors :   *DRAG REDUCTION, *TURBULENT BOUNDARY LAYER, *AERODYNAMIC DRAG, AERONAUTICS, BOUNDARIES, LAYERS, LECTURES, REDUCTION, SKIN FRICTION, STATE OF THE ART, TIME, TRANSITIONS, TURBULENCE, TRANSPORT AIRCRAFT.

Subject Categories : Fluid Mechanics
      Transport Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE