Citation
Dhawan, Satish (1951) Direct Measurements of Skin Friction. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/1S03-8631. https://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 turbulent 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.)) |
|---|---|
| Subject Keywords: | (Aeronautics and Mathematics) |
| Degree Grantor: | California Institute of Technology |
| Division: | Engineering and Applied Science |
| Major Option: | Aeronautics |
| Minor Option: | Mathematics |
| Awards: | Caltech Distinguished Alumni Award, 1969 |
| Thesis Availability: | Public (worldwide access) |
| Research Advisor(s): |
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| Group: | GALCIT, Caltech Distinguished Alumni Award |
| Thesis Committee: |
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| Defense Date: | 1 January 1951 |
| Record Number: | CaltechETD:etd-09262002-155504 |
| Persistent URL: | https://resolver.caltech.edu/CaltechETD:etd-09262002-155504 |
| DOI: | 10.7907/1S03-8631 |
| 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: | 22 Jul 2021 22:43 |
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