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 Kármán'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
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Published - DHAnacatn2567.pdf
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Additional details
- Eprint ID
- 48206
- Resolver ID
- CaltechAUTHORS:20140807-152222360
- 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 Note
- Other Numbering System Identifier
- 2567