Journal of the Korean Society of Mechanical Technology (한국기계기술학회지)

Korean Society of Mechanical Technology (한국기계기술학회)
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A Numerical Study on the Compressible Flow Characteristics of Air Spewed from a High Pressure Tube

고압튜브 내에서 분출되는 공기의 압축성유동 특성에 관한 수치해석 연구

  • Jung, Jong-Kil (Department of Mechanical Engineering, Graduate School, Gachon University) ;
  • Cho, Jeong-Kwon (Transportation Safety Specialist, TS) ;
  • Yoon, Jun-Kyu (Department of Mechanical Engineering, Gachon University) ;
  • Lim, Jong-Han (Department of Mechanical Engineering, Gachon University)
  • Received : 2017.02.01
  • Accepted : 2017.03.06
  • Published : 2017.04.28
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Abstract

In this study, FLUENT v.16.1 was used to investigate the compressible flow generated by the supersonic jet spewed from a high pressure tube. As the boundary condition for CFD (Computational Fluid Dynamics) analysis, the inlet temperature of air was constantly 300 K and the variation of JPR (Jet Pressure Ratio) were 5, 50, 100, 150 and the variation of tube diameter were 10, 20, 30 cm. As a result, it was confirmed that the effective range was increased as the JPR was higher, but it was confirmed that the effective range was lower than the JPR rise, and that the effective range was increased as the diameter was larger. Therefore, it is found that the tube diameter is more sensitive than the JPR among the influence factors of jet, and if the result of this study were reflected in the design of high pressure system, it will contribute to the design of the system for preventing the second accident.

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