Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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A Comparative Study of Single Component Thermophysical Properties using the Real Gas Equation of State at Supercritical Conditions

초임계 영역에서 실제 기체 상태 방정식에 따른 단일 성분의 열역학적 상태량 비교 연구

  • 김국진 (한국항공대학교 항공우주 및 기계공학과) ;
  • 허준영 (한국항공대학교 항공우주 및 기계공학과) ;
  • 김종찬 (한국항공대학교 항공우주 및 기계공학과) ;
  • 구자예 (한국항공대학교 항공우주 및 기계공학과) ;
  • 성홍계 (한국항공대학교 항공우주 및 기계공학과)
  • Received : 2010.01.25
  • Accepted : 2010.05.20
  • Published : 2010.06.30
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Abstract

Theoritical principles about the real gas equation of state are investigated and comparisons for the thermophysical properties of oxygen, hydrogen, and methane as the propellants of liquid rocket engine are carried out for the various conditions of pressure and temperature including supercritical conditions. The properties obtained using the real gas equation of state(Soave modification of Redlich-Kwong, Peng-Robinson equation of state, and extended corresponding states principle) have been compared with the results of applying the ideal gas equation of state. Differences of thermophysical properties among the models specifically at the liquid phase regime and their error ranges are addressed.

실제 기체 상태 방정식에 대한 이론적 원리가 조사되었으며 초임계 조건을 포함한 다양한 압력과 온도 조건에서 액체 로켓 엔진의 추진제로서 사용되는 산소, 수소, 메탄의 열역학적 상태량에 대하여 비교 연구되었다. 또한 이상 기체 상태 방정식을 적용하였을 경우와 실제 기체 상태 방정식(SRK 상태 방정식과 PR 상태 방정식 및 ECS 원리)을 적용하였을 경우의 열역학적 상태량에 대한 비교 연구가 수행되었다. 단일 성분이 액상인 영역에서의 열역학적 상태량 차이가 관찰되었으며 오차 범위에 대한 결과가 고찰되었다.

Keywords

References

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