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Chinese Journal of High Pressure Physics  > 2021  >  35(1): 015201.
LIU Yang, LI Zhan, ZHANG Yadong, CHEN Li, FANG Qin. Safety Evaluation of Gas Cloud Explosions in an Urban Distribution Stations Based on FLACS[J]. Chinese Journal of High Pressure Physics, 2021, 35(1): 015201. doi: 10.11858/gywlxb.20200595
Citation: LIU Yang, LI Zhan, ZHANG Yadong, CHEN Li, FANG Qin. Safety Evaluation of Gas Cloud Explosions in an Urban Distribution Stations Based on FLACS[J]. Chinese Journal of High Pressure Physics, 2021, 35(1): 015201. doi: 10.11858/gywlxb.20200595
shu

Safety Evaluation of Gas Cloud Explosions in an Urban Distribution Stations Based on FLACS

doi: 10.11858/gywlxb.20200595
  • 1.

    State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact,Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

  • 2.

    Engineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education, Southeast University, Nanjing 211189, Jiangsu, China

  • Received Date: 22 Jul 2020
  • Rev Recd Date: 11 Aug 2020
    Abstract
  • There is a possibility of gas leakage during the operation of gas distribution stations. The flammable gas mixture generated by the leaked gases may result in explosion accident and bring about great hazards to the public safety. Based on geographic information system (GIS) technology, the geometric model of urban block around a gas distribution station in Nanjing was established and imported in the CFD software FLACS to simulate the gas cloud explosion. The development process and overpressure distribution of gas cloud explosion around the gas distribution station under typical working conditions were revealed. The influences of gas cloud size, ignition position and gas cloud position on the explosion overpressure were discussed. In addition, the damage level of the gas cloud explosion was discussed based on the numerical predictions. The results show that the application of GIS technology can improve the accuracy and efficiency of the model significantly. When the size of gas cloud is larger than 60 m and with obvious restrictions or obstacles in the ignition position, gas deflagration may occur. When the gas cloud is located on the southwest side of the gasholder, the explosion will cause a wide range of minor injuries (damage) to people (buildings), and cause a certain range of serious injuries (damage) to people (buildings). In order to avoid the serious consequences of gas cloud explosion, the existence of tall and dense buildings near the gas distribution station should be avoided.

     

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