The theory of the fracture of heatproof ablating coatings
Abstract
A mechanism for the destruction of ablative thermal protection coatings is proposed. In the model, high temperatures cause the pyrolysis of the thermal protection material, which is accompanied by the release of gaseous products and the formation of a porous coked layer. The thickness of the coked layer grows with time, leading to an increase in the pressure drop in the filtered gaseous products and the separation of the coked layer. The process is then repeated, with a frequency dependent on heating conditions and type of protective material. A simplified mathematical analysis of the process is presented in order to clarify various relationships in the problem.
- Publication:
-
Fizika Goreniia i Vzryva
- Pub Date:
- September 1979
- Bibcode:
- 1979FizGV..15..177P
- Keywords:
-
- Ablative Materials;
- Pyrolysis;
- Thermal Control Coatings;
- Aerothermodynamics;
- Destruction;
- High Temperature;
- Numerical Analysis;
- Fluid Mechanics and Heat Transfer