Determination of Effects of Oxidation on Performance of Charring Ablators
Auteur : Marvin B. Dow, Robert T. Swann
Date de publication : 1964
Éditeur : National Aeronautics and Space Administration [For sale by the Office of Technical Services, Department of Commerce, Washington, D.C. 20230]
Nombre de pages : 33
Résumé du livre
An investigation of phenolic-nylon specimens was conducted in the 2500-kilowatt arc jet at the Langley Research Center using gas streams of nitrogen and different oxygen concentrations. It was found that certain of the experimental char-removal data could be correlated in terms of a diffusion limited oxidation mechanism. A surface energy balance showed that combustion contribution a significant fraction of the total heat input. The effectiveness of a charring ablator (as determined by the time required to reach a certain back surface temperature rise) is strongly influenced by the oxygen concentration in the test stream.