Citation
Dhawan, Satish (1951) Direct measurements of skin friction. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-09262002-155504
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 a flat plate. These forces, which range from about 1 milligram to about 100 milligrams, are measured by means of a reluctance measuring device. The apparatus was first applied to measurements in the low-speed range, both for laminar and turbulant boundary layers. The measured skin friction coefficients show excellent agreement with Blasius' and Karman's results respectively. 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 floor were also made.
The paper describes the design and construction of the device and the results of the measurements.
| Item Type: | Thesis (Dissertation (Ph.D.)) |
|---|---|
| Degree Grantor: | California Institute of Technology |
| Division: | Engineering and Applied Science |
| Major Option: | Aeronautics |
| Thesis Availability: | Public (worldwide access) |
| Research Advisor(s): |
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| Thesis Committee: |
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| Defense Date: | 1 January 1951 |
| Record Number: | CaltechETD:etd-09262002-155504 |
| Persistent URL: | http://resolver.caltech.edu/CaltechETD:etd-09262002-155504 |
| Default Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
| ID Code: | 3779 |
| Collection: | CaltechTHESIS |
| Deposited By: | Imported from ETD-db |
| Deposited On: | 27 Sep 2002 |
| Last Modified: | 26 Dec 2012 03:02 |
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