Accession Number : ADP006972

Title :   Turbulent Skin Friction Drag Reduction By Active and Passive Means. Part 2,

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

Personal Author(s) : Coustols, E. ; Savill, A. M.

Report Date : MAR 1992

Pagination or Media Count : 26

Abstract : The use of in-flow manipulator devices, such as LEBU's originated from research into the optimum use of screens and honeycombs for controlling (reducing) free-stream turbulence in wind tunnels 197. Such 'flow management' techniques were first applied to boundary layers by researchers at NAL Bangalore about 15 years ago 198, and a rapid succession of further studies (conducted first at IIT 199, NASA 2OO in the USA, then at the FFA in Sweden 201 and the Cavendish Laboratory of the University of Cambridge, England 202) led to the identification of single or preferably tandem (in-line) thin element devices as the best means of achieving any nett drag reduction.

Descriptors :   *DRAG REDUCTION, *TURBULENT BOUNDARY LAYER, *SKIN FRICTION, *AVIATION FUELS, *FUEL CONSUMPTION, BOUNDARIES, DRAG, FLOW, FREE STREAM, IDENTIFICATION, LABORATORIES, LAYERS, MANIPULATORS, REDUCTION, STREAMS, SWEDEN, TUNNELS, TURBULENCE, UNIVERSITIES, WIND, WIND TUNNELS.

Subject Categories : Fluid Mechanics
      Aircraft
      Fuels

Distribution Statement : APPROVED FOR PUBLIC RELEASE