Accession Number:

ADA172045

Title:

An Experimental Investigation of Skin Friction on Smooth Surfaces Supporting Air Bearing Channels.

Descriptive Note:

Aeronautical note,

Corporate Author:

NATIONAL AERONAUTICAL ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s):

• Khalid,M.

Report Date:

1986-07-01

Pagination or Media Count:

42.0

Abstract:

A new method, to obtain skin friction reduction by installing air-bearing channels on a smooth surface in uniform flow was investigated. The measurements were made by a servo-controlled skin friction balance. The parametric studies of the channel having step dimensions less than the laminar sublayer thicknesses and placed in flows of free stream velocity up to 90 fts have shown that an average skin friction reduction of 25 in the air bearing cavity is well within reach. It was also confirmed that riblet type surface grooves can produce up to 10 skin friction drag reduction.

Descriptors:

• *AIRFOILS
• *ANTIFRICTION BEARINGS
• *DRAG REDUCTION
• PARAMETRIC ANALYSIS
• CANADA
• REDUCTION
• LAMINAR FLOW
• REYNOLDS NUMBER
• SERVOMECHANISMS
• SKIN FRICTION

Subject Categories:

• Aircraft
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE