Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Effects of Hole Drilling Angle on Internal Flow of Gasoline Direct Injection Injector

Hole drilling angle이 가솔린 직접 분사식 인젝터의 내부 유동에 미치는 영향

  • 김휘준 (한양대학교 융합기계공학과) ;
  • 박성욱 (한양대학교 기계공학부)
  • Received : 2021.11.12
  • Accepted : 2021.11.25
  • Published : 2021.12.31
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Abstract

In gasoline direct injection injectors, cavitation can be generated inside the hole because of their high injection pressure. In this paper, the effects of cavitation development in injector were investigated depending on the various hole drilling angles were investigated by a numerical method. In order to verify the internal flow model, injection rate and injection quantity of individual holes were measured. The BOSCH long tube method was used to measure the injection rate. As a result, even if the hole diameters were the same, the discharge coefficient differed by up to 10% depending on the hole angle. Moreover, if the hole drilling angle became greater than 30°, the area coefficient and the discharge coefficient decreased as the nozzle outlet was blocked due to cavitation.

Keywords

Acknowledgement

이 연구는 사단계 BK21사업 지원으로 수행되었습니다.

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