Measurements were made of the "effective" thermal conductivity of a controlled weave sampling of eighteen different nylon fabrics which are used in parachutes. Fabric conductivity data were determined under varying conditions of compressive stress, at ambient pressure, and at a mean temperature of 190° F using a modified Cenco-Fitch apparatus. A similarity relation was obtained, from dimensional analysis, which correlated the effect of compressive load upon fabric conductivity. Limited available published data indicate that this similarity relation may also be extended to include cotton and wool fabrics as well as nylons.
Get full access to this article
View all access options for this article.
References
1.
Arthur D. Little, Inc."Candidate Materials for High Temperature Fahrics," WADD Technical Report 59-155 ( September 1959).
2.
Baxter, S., Proc. Phys. Soc. (London) 58, 105-118 (1946).
3.
Bickford, H.J. , Kuehl, D.K., and Rusk, T.L., "Study of the Control of Permeability of Nylon Parachute Cloth at High and Low Differential Pressures," WADD Technical Report 54-468 (March 1955).
4.
Bogaty, H., Hollies, N.S., and Harris, M., Textile Research J.27, 445-449 (1957).
5.
Central Scientific Company, "Thermal Conductivity,"Bulletin No. 71990-H526 (1940).
6.
Du Pont de Nemours (E. I.) Co., "Thermal Properties of Du Pont Nylon,"Bulletin No. N-54 (January 1956).
7.
Engholm, G., Lis, S.J., and Bamhenek. R.A., "Instantaneous Local Temperatures of Aerodynamic Decelerators, Part I. Methods of Predicting ; Part II. Thermal Properties," WADD Technical Report 60-670 (September 1960).
8.
McAdams, W.H. , "Heat Transmission,"3rd ed., New York, McGraw-Hill, 1954, pp. 126-239.
9.
Marx, P., Smith, C.W., Worthington, A.E., and Dole, M., J. Chem. Phys.59, 1015-1018 (1955 ).
10.
Morris, G.J. , J. Textile Inst.44, T449-476 (1953).
