Empirical Expression for Estimation of Thermal Characteristics of Materials Used for Thermal Protection

Abstract:

Article Preview

A formula for quick calculation of thermal characteristics of materials used for thermal protection is proposed. The mode of heating of the sample external surface (subjected to thermal exposure) is approximated by two regions, which differ by corresponding boundary conditions on the heating surface: T_f=cτ (linear growing with time) and T_f=const (with permanent temperature of destruction). That approximation permits to obtain an analytical solution in integral form. In order to simplify and accelerate data treatment, a simple empirical formula is proposed. A contribution of each thermal region is proportional to the regime duration. A good agreement with an analytical solution is shown.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 297-301)

Edited by:

Prof. Andreas Öchsner, Prof. Graeme E. Murch, Ali Shokuhfar and Prof. João M.P.Q. Delgado

Pages:

15-18

Citation:

A. M. Essiptchouk et al., "Empirical Expression for Estimation of Thermal Characteristics of Materials Used for Thermal Protection", Defect and Diffusion Forum, Vols. 297-301, pp. 15-18, 2010

Online since:

April 2010

Export:

Price:

$41.00

[1] A.V. Luikov: Analytical Heat Diffusion Theory. Ed. J.P. Hartnett (Academic Press, New York, 1968).

[2] H.S. Carslaw and J.C. Jaeger: Conduction of Heat in Solids (Oxford University Press, London and New York, 1959, p.488).

[3] Ju.V. Polezhaev and A.A. Shishkov: Gas-dynamic testing of heat shield (Promedek, Moscow, 1992, p.248.