한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제22권2호
  • /
  • Pages.1-10
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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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음향가진된 횡단류 유동장 내 액체제트의 분무특성

Spray Characteristics of Liquid Jets in Acoustically-Forced Crossflows

  • Song, Yoonho (School of Mechanical Engineering, Chungbuk National University) ;
  • Hwang, Donghyun (School of Mechanical Engineering, Chungbuk National University) ;
  • Ahn, Kyubok (School of Mechanical Engineering, Chungbuk National University)
  • 투고 : 2017.05.03
  • 심사 : 2017.08.10
  • 발행 : 2018.04.01
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초록

본 연구에서는 횡단류 공기유동에 수직으로 분사되는 액체제트의 분열거리와 액주궤적에 대한 음향가진의 영향을 살펴보았다. 이를 위해 단공 원형노즐 분사기를 이용하여 동일한 횡단류 공기속도에서 분사압력과 음향가진의 크기를 변화시켜가며 수류실험을 수행하였다. 또한 음향가진 주파수 기준 12개의 위상각에서 분무 이미지를 얻어 위상각 변화에 따른 영향을 확인하였다. 실험결과 분열길이는 비가진 상태에 비해 음향가진 상태에서 전반적으로 감소하였지만 위상각에 따른 변화는 발견되지 않았다. 본 실험 범위 내에서 음향가진은 수직분사 액체제트의 액주궤적에 거의 영향을 주지 못하였다.

This study investigated the acoustic forcing effects on the liquid column breakup length and the trajectory of liquid jets in crossflows. Cold-flow tests with a single hole circular nozzle injector were carried out by changing the injection pressure and acoustic forcing amplitude. Additionally, spray images were obtained at 12 phase angles to investigate the influence of the phage angle. The results revealed that the liquid column breakup lengths generally decreased under the acoustic forcing conditions, in comparison to those under the non-acoustic forcing conditions. However, they were not affected by the variation in the phase angles. On the contrary, it was found that the acoustic forcing hardly influenced the liquid column trajectories.

키워드

참고문헌

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피인용 문헌

  1. Effect of Orifice Geometry on Column Trajectories of Liquid Jets in Crossflows pp.2093-2480, 2019, https://doi.org/10.1007/s42405-018-0130-3