Accession Number : AD0624488

Title :   INVESTIGATION OF METHODS FOR RE-ESTABLISHMENT OF A LAMINAR BOUNDARY LAYER FROM TURBULENT FLOW.

Descriptive Note : Summary rept.,

Corporate Author : NORAIR DIV NORTHROP CORP HAWTHORNE CALIF

Personal Author(s) : Pfenninger,W. ; Bacon,John W. ,Jr.

Report Date : FEB 1965

Pagination or Media Count : 65

Abstract : By means of area suction, laminar flow was reestablished in tripped turbulent boundary layers for a unit Reynolds number range from 0.4 to 1.0 million per foot in incompressible flow. The removal of about 1.5 times the turbulent boundary layer thickness is adequate to restart a maintainable laminar boundary layer. Hot wire observations show that the restarted laminar boundary layer is generally a composite layer with laminar velocity fluctuations from the wall out to about one boundary layer thickness and weak turbulent velocity fluctuations in the outer portion. (Author)

Descriptors :   (*LAMINAR BOUNDARY LAYER, AREA SUCTION), (*TURBULENT BOUNDARY LAYER, BOUNDARY LAYER CONTROL), LAMINAR FLOW, THICKNESS, VELOCITY, FLAT PLATE MODELS, STABILIZATION

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE