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http://dx.doi.org/10.5139/JKSAS.2010.38.2.200

Thermal Performance Evaluations of Tungsten/Yttria as Nozzle Throat Insert Material for Long Duration Firing  

Kang, Yoon-Goo (국방과학연구소 1기술본부 6부)
Park, Jong-Ho (충남대학교 BK21 메카트로닉스사업단)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.38, no.2, 2010 , pp. 200-205 More about this Journal
Abstract
Heat-resistance of W/$Y_2O_3$ as throat insert material was evaluated to develop rocket motor keeping thrust uniformly under condition of high-temperature, high-pressure and long-burn time. Test was conducted with varying burn time, and test results were compared with CIT. Test showed that ablation rate was decreased according as burn time was increased, and that ablation rate of W/$Y_2O_3$ was about 55 % of CIT. Macro/micro structures of throat insert did not show a peculiar phenomenon by increased burn time. In addition, the vacuum heat treatment is effective for the prevention of crack in throat insert.
Keywords
Throat Insert; Ablation; Non-Eroding; W/$Y_2O_3$; CIT; $WO_3$;
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Times Cited By KSCI : 2  (Citation Analysis)
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