Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
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Analysis on Thermochemical Erosion Properties for Thermal Insulation Materials of Graphite Nozzle Throat

흑연 노즐목 내열재의 열화학적 침식 특성 분석

  • Kim, Young-in (School of Aerospace & Mechanical Engineering, Korea Aerospace University(Hanseo University)) ;
  • Lee, Soo-yong (School of Aerospace & Mechanical Engineering, Korea Aerospace University)
  • 김영인 (한국항공대학교 항공우주 및 기계공학과(한서대학교)) ;
  • 이수용 (한국항공대학교 항공우주 및 기계공학과)
  • Received : 2018.04.10
  • Accepted : 2018.04.24
  • Published : 2018.04.30
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Abstract

In the solid rocket motor (SRM), a thrust of rocket is generated by a nozzle so it is very important device. The nozzle of SRM is a condition of high temperature and high pressure so occurs the erosion by combustion gas. The liquid rocket propulsion systems (LRPSs) cools the nozzle by the fuel and oxidizer but SRM does not cool the nozzle. This paper deal with the development of the oxy-acetylene torch tester and investigate the thermochemical erosion properties for the thermal insulation materials of the graphite rocket nozzle throat through the experiment. The results of experiments are compared with the results of Theoretical model and identify the key factors affecting of erosion. The results is in good agreement with the experimental data.

로켓 (rocket)이란 배출가스를 빠르게 분사하여 그 반작용의 힘으로 추진력을 발생시키는 추진 장치이다. 그리고 고체추진 로켓 (solid rocket motor)의 구조에서 노즐(nozzle)은 추력을 발생시키는 중요한 구성품으로 고온/고압 환경으로 인하여 연소되며 액체로켓 (liquid rocket propulsion systems)과 다르게 노즐을 냉각시킬 수 없어 연소가스에 의해 침식 (erosion)이 발생한다. 본 논문은 oxy-acetylene torch tester를 개발 및 이용하여 흑연 (graphite) 재질의 노즐목 (nozzle throat) 내열재에 대하여 열화학적 침식 특성을 실험 및 이론적 모델로 규명하고 이를 통하여 침식에 영향을 미치는 주요 인자에 대하여 연구하였다.

Keywords

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