Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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A Study on the Properties of Solid Propellants with Respect to the Crystal Phase of HNIW

HNIW 결정상에 따른 고체추진제 특성 연구

  • Jang, Myungwook (Quality Assurance Team, Hanwha Corporation Daejeon Plant) ;
  • Kim, Taekyu (Quality Assurance Team, Hanwha Corporation Daejeon Plant) ;
  • Jung, Hoon (Quality Assurance Team, Hanwha Corporation Daejeon Plant) ;
  • Lee, Dug Bum (Quality Assurance Team, Hanwha Corporation Daejeon Plant)
  • Received : 2018.12.24
  • Accepted : 2019.04.04
  • Published : 2019.06.01
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Abstract

HNIW is a high energy material and has four crystalline phases, it is known that the thermal properties of the material depend on the crystal phase. In this sturdy, the viscosity, mechanical and burning properties of a solid propellant with nitrate ester polyester(NEPE) system with respect to the crystal phases of HNIW. According to the crystal phase of HNIW, the mechanical properties of the cured propellant did not change considerably, however differences were observed in the burning properties. Considering both a high density and stable burning properties, the optimum crystal phase of HNIW can be identified as the main factor influencing to the NEPE system propellant.

HNIW는 고에너지 물질로 4가지 결정상(${\alpha},\;{\beta},\;{\gamma},\;{\varepsilon}$)을 가지고 있으며, 결정상에 따른 열적 특성이 변화하는 것으로 알려져 있다. 본 연구는 혼합형 고체 추진제의 한 종류인 나이트레이트 에스터 폴리이서(Nitrate Ester Polyester; NEPE)계열의 추진제에서 주로 사용되는 HNIW의 결정상에 따른 추진제점도, 기계적 물성 및 연소특성 변화를 관찰하였다. HNIW의 결정상에 따라 경화 추진제의 기계적 물성은 큰 변화가 없으나, 연소 특성에는 큰 차이를 보는 것으로 확인할 수 있었다. 추진제의 높은 밀도와 안정된 연소특성을 동시에 고려할 때, HNIW의 결정상은 NEPE계 추진제의 주요 인자로 확인할 수 있다.

Keywords

References

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