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Experimental Study on the Characteristics of Micro Jet Flow Using Digital Microscopic Holography

디지털 현미경 홀로그래피 기법을 이용한 마이크로 액체 제트 유동에 관한 실험적 연구

  • Lee, Haneol (School of Mechanical Engineering, Chungnam National University) ;
  • Lee, Jaiho (Korea Hydro & Nuclear Power Co.) ;
  • Shin, Weon Gyu (School of Mechanical Engineering, Chungnam National University)
  • Received : 2018.03.20
  • Accepted : 2018.04.23
  • Published : 2018.04.30

Abstract

In this study, the effect of injection pressure on the column diameter and droplet velocity of liquid jet with the weakly turbulent Rayleigh-like breakup mode is experimentally studied using digital microscopic holography (DMH). The injection nozzle has the diameter of $50{\mu}m$ and injection pressure is varied from 0.1 to 0.4 MPa. When the micro liquid jet is injected into still air, the double-pulsed holograms was recorded on a CCD sensor and numerically reconstructed in order to obtain well focused images. In this study, the liquid column diameter from $50{\mu}m$ orifice nozzle is shown to be changed slightly but the droplet velocity is increased proportionally as the injection pressure is increased.

Acknowledgement

Supported by : 충남대학교

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