Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
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A Study on the Collision Nozzle for Generating Microbubble by Self-Suction Method

자흡방식에 의해 마이크로버블을 발생시키는 충돌 노즐에 대한 연구

  • Woo-Jin Kang (Dept. of mechanical engineering, Kumoh National Institute of Technology) ;
  • Sang-Hee Park (Dept. of mechanical engineering, Kumoh National Institute of Technology) ;
  • Seong-Hun Yu (Dept. of mechanical engineering, Kumoh National Institute of Technology)
  • 강우진 (금오공과대학교 기계공학과 대학원) ;
  • 박상희 (금오공과대학교 기계공학과) ;
  • 유성훈 (금오공과대학교 기계공학과 대학원)
  • Received : 2023.10.10
  • Accepted : 2023.11.13
  • Published : 2023.12.31
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Abstract

An experimental study was performed on the collision nozzle system that generates microbubble by air self-suction using a venturi nozzle. This study experimentally investigates the pressure of a pump and a dissolution tank, water flow rate, air self-suction amount and microbubble generation amount. The experimental conditions were varied by changing the diameter of the collision nozzle (de=4,5,6,7,8mm), the pumping power(0.5hp, 1.0hp) and the capacity of the dissolution tank(4.4L, 8/8L). The pressure change of the pump according to the outlet diameter of the collision nozzle showed that the 1.0hp pump power operated more stably than the 0.5hp pump. The pressure change in the dissolution tank was shown to decrease rapidly as the outlet diameter of the nozzle increased. The flow rate of recirculating water was shown to increase as the nozzle diameter increased. Additionally, it was shown that the pump capacity of 1.0hp increased the flow rate more than that of 0.5hp. The self-suction air flow rate was shown to occur above de=6mm, and the air flow rate increased as the nozzle diameter increased. Also, as the pump capacity increased, the self-suction amount of air increased. It was shown that the amount of microbubble less than 50mm generated was maximum when the nozzle diameter was 6mm, the pump power was 1.0hp, and the dissolution tank capacity was 8.8L.

Keywords

Acknowledgement

이 연구는 금오공과대학교 학술연구비로 지원되었음(2021년).

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