- Author
-
Leong, E. H.
|
Williams, M. E.
- Title
- Surface Temperatures in a Two-Layer Air-Spaced Slab System Irradiated From One Side. Technical Report No. 4.
- Coporate
- Massachusetts Institute of Technology, Cambridge
- Report
-
Technical Report No. 4
January 30, 1956
77 p.
- Distribution
- AVAILABLE FROM National Technical Information Service (NTIS), Technology Administration, U.S. Department of Commerce, Springfield, VA 22161. Telephone: 1-800-553-6847 or 703-605-6000; Fax: 703-605-6900. Website: http://www.ntis.gov
- Keywords
-
fabrics
|
skin (human)
|
surface temperature
|
thermal conductivity
|
heat capacity
|
experiments
|
damage
|
heat flux
|
explosions
- Identifiers
- unsteady state heat conduction; method of finite difference approximations; theroy of skin simulant
- Abstract
- A mathematical analysis has been carried out for unsteady state heat conduction through a simple two layer system consisting of a thin layer of material (cloth) at various distances from a semi-infinite solid (akin) and the temperature variations with time at various points on the system have been obtained by solving the appropriate heat flow equations. Curves have been drawn for different spacings between the cloth and main body and also for different (thermal conductivity) (volumetric heat capacity) ratios, where subscripts m and c refer to main body and cloth respectively. Experiments were designed to determine whether the model was amenable to the mathematical analysis. The model consisted of cotton sateen over a polyethylene block (main body) and separated from it by an air space of known thickness. Temperature vs. time relationships were measured for the front and back cloth surfaces and the polyethylene surface by irradiating the model on a solar furnace.