Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Effect of Injection Pressure on the Flash Boiling Spray from Simple Orifice Nozzle

인젝터 압력이 단공노즐 감압비등 분무에 미치는 영향

  • 이현창 (경남대학교 기계공학부) ;
  • 차현우 (경남대학교 기계융합공학과) ;
  • 강동현 (경남대학교 기계융합공학과)
  • Received : 2022.02.28
  • Accepted : 2022.03.11
  • Published : 2022.03.31
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Abstract

Flash boiling occurs in a couple of modern engineering systems and understanding its mechanism is important. In this experimental study, discharge coefficient of flash boiling spray from simple orifice nozzle was measured, and backlight imaging was acquired at injection pressure to 6.0 bar and temperature to 163℃ for the purpose. Pressurized water by pump was used for working fluid and was heated by electric heater and ejected through simple orifice nozzle diameter of 0.5 mm. High speed camera with long distance microscope was used for backlight imaging in two FoV having magnification of 3.3 and 0.64. The decrease of discharge coefficient according to degree of superheating and evolution of flash boiling spray imaged at various pressure and temperature were explained by the pressure field inside the injector.

Keywords

Acknowledgement

이 논문은 국방기술품질원의 방산혁신클러스터 지원 사업(DCL2020L)의 지원을 받아 수행된 연구임.

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