Direct Measurements of Skin Friction
- Creators
- Dhawan, Satish
Abstract
A device has been developed to measure local skin friction on a flat plate by measuring the force exerted upon a very small movable part of the surface of the flat plate. These forces, which range from about 1 milligram to about 100 milligrams, are measured by means of a reactance device. The apparatus was first applied to measurements in the low-speed range, both for laminar and turbulent boundary layers. The measured skin-friction coefficients show excellent agreement with Blasius' and Von Karman's results. The device was then applied to high-speed subsonic flow and the turbulent-skin-friction coefficients were determined up to a Mach number of about 0.8. A few measurements in supersonic flow were also made. This paper describes the design and construction of the device and the results of the measurements.
Additional Information
No copyright. Supersedes NACA Technical Note 2567.Attached Files
Published - 19930092157.pdf
Files
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Additional details
- Eprint ID
- 48207
- Resolver ID
- CaltechAUTHORS:20140807-152807050
- Created
-
2014-08-07Created from EPrint's datestamp field
- Updated
-
2019-10-03Created from EPrint's last_modified field
- Other Numbering System Name
- NACA Technical Report
- Other Numbering System Identifier
- 1121