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Dependence of Explosion Overpressure of Flammable Gas on the Change of Volume Blockage Ratio of Facilities

설비 혼잡도에 따른 가연성 증기운의 폭발과압의 변화

Lee, Seung Kuk;Lee, Da Eun;Kim, Sung Chan;Yoon, Kee Bong
이승국;이다은;김성찬;윤기봉

  • Received : 2015.11.03
  • Accepted : 2015.12.08
  • Published : 2015.12.31

Abstract

A series of CFD calculation has been conducted to investigate the effect of facility confinement on explosion power for process plant facility. The level of confinement of a facility was simplified with VBR(volume blockage ratio) and averaged size of obstacles. FLACS which is 3D CFD code of gas dispersion and the explosion was used for simulating the explosion phenomena in the idealized domain with different confinement level. The CFD results showed a tendency that the overpressure increases with increasing VBR and number of obstacles. The effect of VBR on the overpressure was relatively small for the case of number of obstacle less than 25. The results of this study can be used to provide a safety guideline considering the facility confinement in case of leakage accident of flammable gas and vapor in process plants.

Keywords

explosion;VBR(volume blockage ratio);process plant;safety;FLACS;CFD

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Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)