Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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The Effect of Pressure and Oxidation Mole Fraction on Ablation Rate of Graphite for Nozzle Throat Insert

압력과 산화몰분율이 그라이트 목삽입재의 삭마율에 미치는 영향

  • Hahm, Heecheol (4-Advanced Propulsion Technology Center, Agency for Defense Development) ;
  • Kang, Yoongoo (4-Advanced Propulsion Technology Center, Agency for Defense Development)
  • Received : 2013.06.05
  • Accepted : 2014.01.03
  • Published : 2014.02.01
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Abstract

The ablation characteristics of graphite nozzle throat insert is analyzed for the use in solid rocket propulsion system. The propulsion system is composed of three types of conventional nozzles, such as De-Laval type, blast tube type, and submerged type. Various kinds of propellants are used in the thirteen kinds of propulsion system that has different shapes of each other. Total thirty seven tests are performed. From the results of the analysis, it is found that the ablation rate is higher for the higher average chamber pressure and the higher concentration of oxidizing species in combustion gas.

고체 로켓 추진기관의 노즐목 삽입재에 적용하는 그라파이트의 삭마율 특성을 분석하였다. 지상연소시험은 3종류의 일반적인 노즐형태를 갖는 추진기관을 사용하여 수행하였다. 즉, De-Laval 형태, 토출관 형태, 내삽 형태이다. 13종류의 서로 다른 형상의 추진기관에 다양한 추진제를 적용하였고, 노즐목 위치에 그라파이트를 적용하여 총 37회의 연소시험을 수행하였다. 분석결과 그라파이트의 삭마율은 연소실 평균압력이 상승함에 따라, 산화몰분율이 증가함에 따라 증가함을 알 수 있다.

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References

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