Power consumption of major factors of heat absorption in aerodynamic heating of heat-protective coatings of objects of space-rocket engineering. II. Limit power consumption of surface processes of absorption of heat at thermal destruction of a material

1Frolov, GA
1I.N. Frantsevich Institute for Material Science Problems, NAS of Ukraine, Kyiv, Ukraine
Kosm. nauka tehnol. 2003, 9 ;(2-3):068-076
Publication Language: Russian
We generalize results of numerical and experimental investigations of thermal destruction of materials over a wide range of thermogas dynamic parameters of a gas flow modelling the aerodynamic heating of heat-protective coatings (HPC). We determined the parameter of stabilization of the ablation. It is approximately equal to double the maximum thermal effect of physical and chemical processes on the surface of a disintegrating material (ΔԚω)max. We found an interrelation between (ΔԚω)max and heats of evaporation of individual substances and the a constant of thermal destruction of a material. This constant was established from an analysis of the non-stationary warm-up and ablation of HPC. Our results allow us to prove the validity of the established law for porous cooling of a body up to a value of dimensionless speed of injection of 9. 
Keywords: heat-protective coatings, space-rocket engineering, thermal destruction
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