한국분무공학회지 (Journal of ILASS-Korea)

  • 제28권2호
  • /
  • Pages.89-96
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  • 2023
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  • 1226-2277(pISSN)
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  • 2288-9051(eISSN)
한국분무공학회 (Institute for Liquid Atomization and Spray Systems-Korea)
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고온 항공유의 오리피스 인젝터 분사특성 수치해석

Numerical Simulation of Orifice Injection Characteristics of High Temperature Aviation Fuel

  • 황성록 (부경대학교 대학원 기계공학과) ;
  • 이형주 (부경대학교 기계공학전공)
  • 투고 : 2023.06.05
  • 심사 : 2023.06.20
  • 발행 : 2023.06.30
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초록

This study presents a numerical simulation investigating hydrodynamic characteristics of high-temperature hydrocarbon aviation fuel injected through a plain orifice injector. The analysis encompassed the temperature range up to the critical point, and the obtained results were compared with prior experimental observations. The analysis unveiled that the injector's exit pressure remains equivalent to the ambient pressure when the fuel injection temperature is below the boiling point. However, when the fuel temperature surpasses the boiling point, the exit pressure of the injector transitions to the saturated vapor pressure corresponding to the fuel injection temperature. Consequently, the exit pressure of the injector increases in tandem with the rapid increase of the saturation vapor pressure due to escalating fuel temperatures. This rise in the exit pressure necessitates a proportional increase in fuel injection pressure to ensure a fixed fuel mass flow rate. Furthermore, the investigation revealed that the discharge coefficient obtained by applying the exit pressure instead of the ambient pressure did exhibit no decrease, but rather was maintained at a nearly constant value, comparable to its level below the boiling point.

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과제정보

본 연구는 부경대학교 자율창의학술연구비(2022년)에 의하여 수행되었습니다.

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