한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제22권5호
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  • Pages.32-39
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  • 2018
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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근임계 환경으로 분사되는 탄화수소 제트의 임계점이 분사거동에 미치는 영향

Influence of Critical Point of Hydrocarbon Jet Injected into Near-Critical Environment on Injection Behavior

  • Yoon, Taekyung (Department of Mechanical and Aerospace Engineering, Graduate School, Korea Aerospace University) ;
  • Shin, Dongsoo (Department of Mechanical and Aerospace Engineering, Graduate School, Korea Aerospace University) ;
  • Lee, Keonwoong (Department of Mechanical and Aerospace Engineering, Graduate School, Korea Aerospace University) ;
  • Koo, Jaye (School of Mechanical and Aerospace Engineering, Korea Aerospace University)
  • 투고 : 2017.06.05
  • 심사 : 2018.01.27
  • 발행 : 2018.10.01
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초록

추진기관 연료의 주 성분으로 사용되는 액체 탄화수소 화합물의 초임계 분사 거동 특성을 분석하였다. 임계점의 차이가 있는 Decane과 Methylcyclohexane (MCH)를 실험 유체로 선정하였으며 Shadowgraphy 기법을 사용하였다. 아임계 조건의 동일한 인젝터 초기상태에서 Decane과 MCH는 서로 다른 거동을 보였다. 하지만 임계점 부근에서 증발엔탈피가 0에 가까워져 기화과정이 아닌 초임계 유체로의 상변화가 일어나고, 급격한 밀도변화가 없어 두 가지 유체 모두 분열이 발생하지 않았다.

Supercritical injection behavior of liquid hydrocarbon compounds, which are used as main components of propellant fuel, was analyzed. Decane and Methylcyclohexane (MCH) with different critical points were selected as experimental fluid and Shadowgraphy technique was used. Decane and MCH behave differently in the initial state under the subcritical condition. However, near the critical point, the enthalpy of evaporation became close to 0, so that phase change into supercritical fluid occurred, not vaporization process, and no breakup of both fluids occurred.

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참고문헌

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