Experimental Investigation of Ablative Materials

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  • 耐熱複合材の研究
  • タイネツ フクゴウザイ ノ ケンキュウ

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Abstract

Ablative behavior of cloths of impregnated carbon, silica and ceramic with phenolic resin, was investigated experimentally by oxygen-acetylene torch testings and aluminized solid propellant motor firing.<BR>The heat transfer coefficient on specimens under torch testings and motor firing test was 0.05 to 0.2 and 0.5 to 1.6kcal/mm2sec°C, respectively.<BR>From the data obtained by torch testing and sub-scale solid motor firing test, a combination of carbon GF-20/phenolic 5900 was chosen as the throat material of the 6-in solid motor.<BR>The ablative characteristic of the composite material was obtained successfully by firing.<BR>Of interest was the fact there was no variation in the throat diameter ofter firing. It was shown that the calculated temperature history agreed well with experiment, and that, due to ablation, the equivalent heat transfer rate decreased to 4 % of heat transfer rate without ablation.

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