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《Research of Environmental Sciences》 2009-05
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Kaixian Blowout Accident Simulation and Analysis using Fluent Code

LI Jian-feng,YAO Xiao-hui,LIU Xiao-qinBeijing Municipal Institute of Labor Protection,Beijing 100054,China  
Using computational fluid dynamics and physical boundary conditions drawn from accident data from the Kaixian blowout,through the existing Fluent code,a large-area open space diffusion simulation of a poisonous gas accident was performed.The goal was to explain the cause of the incident.Then,with the validation criteria derived from the accident's background,the simulation result was validated and analyzed using the criteria for hydrogen sulfide acute poisoning.The impacts from the wind fields and complex terrains were especially investigated.Three critical conclusions were drawn: the high-concentration accumulation of hydrogen sulfide resulted from the local terrain in Kaixian,which also was intensified by the static wind conditions when the accident occurred.The heavy gas effect of H_2S exerted slight impact on the dispersion,but was not a critical factor.Third,in the discussion,the analysis was concentrated on the health effect of the poisonous gases.It was shown that the upward evacuation strategy is far from valid because the differences in molecular weight between hydrogen sulfide and air are limited,so high concentrations may appear at any altitude.
【Fund】: 国家“十一五”科技支撑计划项目(200603746006 2006BAK08B01);; 国家高技术研究发展计划(863)项目(2006AA012336-2);; 北京市科技新星计划项目(2006A36)
【CateGory Index】: X928
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