Evaluation of thermal and kinetic properties suitable for high heating rate computations
Abstract
Computer codes that model dimensional, weight, and energy changes in ablative or pyrolysis materials, such as ballistic missile reentry vehicle heatshields or thermal insulators, generally have to use effective rather than measured property values for some of their input. A primary reason for the discrepancy in values is that the properties are not measured under the heating rate and temperature conditions for which they will be used. In this study, heat capacity, thermal conductivity, and kinetic parameters from thermogravimetric analysis data are generated under the high heating rate conditions that simulate reentry and abrupt fire conditions. Differences in values between steady state or low heating rate data and high heating rate data are examined. The Charring Material Ablation Program is used to model ablation material and insulator performance using high heating rate properties to show the improved correlation between computed and observed test results.
- Publication:
-
AIAA, 22nd Thermophysics Conference
- Pub Date:
- June 1987
- Bibcode:
- 1987thph.confQ....A
- Keywords:
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- Ablation;
- Hypersonic Heat Transfer;
- Kinetic Heating;
- Pyrolysis;
- Reentry Shielding;
- Thermal Simulation;
- Thermal Analysis;
- Thermal Insulation;
- Fluid Mechanics and Heat Transfer