MATHEMATICAL MODEL FOR CALCULATING THE
HEAT-PROTECTION PROPERTIES OF THE COMPOSITE
COATING "CERAMIC MICROSPHERES-BINDER" 

M. L. German and P. S. Grinchuk

UDC 536.33

A mathematical model which makes it possible to calculate 
the heat-protection properties of the composite coating "ceramic 
microspheres-binder" is proposed. The model takes account of the 
optical and thermophysical properties of the components and the 
optical properties of a substrate. It is shown that the decrease 
in the heat loss due to suppression of its radiative component by 
the coating in question can reach more than 50%. Under certain 
conditions, the heat-insulation effect can be absent or even inverted, 
i.e., the presence of the coating is capable of resulting in an 
increase in the heat flux from the surface being protected. Comparison 
of the data of the performed full-scale experiment and the calculations 
based on the proposed model showed that the latter adequately reflects 
the actual process of heat transfer and can be used for calculating 
the heat-protection properties of coatings representing a compound of 
a binder and ceramic microspheres.

A. V. Luikov Heat and Mass Transfer Institute, National 
Academy of Sciences of Belarus, Minsk, Belarus. Translated from 
Inzhenerno-Fizicheskii Zhurnal, Vol. 75, No. 6, pp. 43-53, 
November-December, 2002. Original article submitted May 22, 2002.

JEPTER74920200214
JEPTER7492014