CFD Analysis on Discharge Passage Flow of Hydrogen Reciprocating Compressor

왕복동식 수소압축기의 토출구 유동에 관한 CFD해석

  • Lee, Gyeong-Hwan (Graduate School, Department of Mechanical and Precision Engineering, Gyeongsang National University) ;
  • Rahman, Mohammad-Shiddiqur (Graduate School, Department of Mechanical and Precision Engineering, Gyeongsang National University) ;
  • Chung, Han-Shik (Graduate School, Department of Mechanical and Precision Engineering, Gyeongsang National University) ;
  • Jung, Hyo-Min (Graduate School, Department of Mechanical and Precision Engineering, Gyeongsang National University)
  • 이경환 (경상대학교 정밀기계공학과) ;
  • ;
  • 정한식 (경상대학교 정밀기계공학과 해양산업연구소) ;
  • 정효민 (경상대학교 정밀기계공학과 해양산업연구소)
  • Published : 2008.11.21

Abstract

The reciprocating compressor is widely used in the industry field, because it has simple principle and high efficiency. In this work, in order to improve design of discharge passage line in hydrogen compression system Numerical analysis was conducted. General information about an internal gas flow is presented by numerical analysis approach. Relating with hydrogen compressing system, which have an important role in hydrogen energy utilization, this should be a useful tool to observe the flow quickly and clearly. Flow characteristic analysis, including velocity, pressure and turbulence kinetic energy distribution of hydrogen gas going out from the cylinder to discharge-path line are presented in this paper. Discharge-passage model is designed based on real model of hydrogen compressor. Pressure boundary conditions are applied considering the real condition of operating system. The result shows velocity, pressure and turbulent kinetic energy are not distributed uniformly along the passage of the Hydrogen system. Path line or particles tracks help to demonstrate flow characteristics inside the passage. The existence of vortices and flow direction can be precisely predicted. Based on this result, the design improvement might be done.

Keywords