Korean Journal of Chemical Engineering

The Korean Institute of Chemical Engineers (한국화학공학회)
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Evaluation of the cavitation effect on liquid fuel atomization by numerical simulation

  • Choi, Sang In (Department of Applied Environmental Science, Kyung Hee University) ;
  • Feng, Jia Ping (Department of Applied Environmental Science, Kyung Hee University) ;
  • Seo, Ho Suk (EG Power Tech Co., Ltd.) ;
  • Jo, Young Min (Department of Applied Environmental Science, Kyung Hee University) ;
  • Lee, Hyun Chang (Dept. of Mechanical Design, Kangwon National University)
  • Received : 2018.02.16
  • Accepted : 2018.08.16
  • Published : 2018.11.30
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Abstract

Heavy duty diesel vehicles deteriorate urban air quality by discharging a large volume of air pollutants such as soot and nitrogen oxides. In this study, a newly introduced auxiliary device a fuel activation device (FAD) to improve the combustion efficiency of internal engines by utilizing the cavitation effect was closely investigated by the fluid flow mechanism via a numerical analysis method. As a result, the FAD contributed to fuel atomization from the injection nozzle at lower inlet pressure by reducing the pressure energy. The improved cavitation effect facilitated fuel atomization, and ultimately reduced pollutant emission due to the decrease in fuel consumption. The axial velocity along the flow channel was increased 8.7 times with the aid of FAD, which improved the primary break-up of bubbles. The FAD cavitation effect produced 1.09-times larger turbulent bubbles under the same pressure and fuel injection amount than without FAD.

Keywords

Acknowledgement

Supported by : Korea Small and Medium Business Administration, Kangwon National University

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