火灾烟气浓度弥散过程中分岔与奇异性研究  

Bifurcation and singularity of smoke dispersion in fire

作　　者：杨振宏[1] 马德仲[1] 常心坦[2] 汪秀嶂[1] 何娟霞[1] 王祥尧[1] 张旭华[1] 

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]西安科技大学能源工程学院,陕西西安710054

出　　处：《西安科技大学学报》2005年第4期443-446,451,共5页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金项目(50174045)

摘　　要：结合某大型储油罐区的自然环境条件,建立了火灾烟气浓度及其随时空变化的数学模型;借助ALOFT-FT软件,揭示火灾烟气浓度弥散过程中的分岔和奇异性;利用三维多彩散点和三维矩阵技术对火灾烟气中CO,SO2和PM10的分岔和奇异性实现可视化,绘出了在下风向轴线上和地表上火灾烟气中CO,SO2和PM10浓度的弥散燕列图和弥散燕影图,为制定重大事故应急救援预案和火灾事故人员疏散提供科学的决策依据。According to actual conditions of a large-scale oil pot site, mathematical model on spatiotemporal dispersion of smoke is established and ALOFT-FT（A Large Outdoor Fire plume Trajectory model-Flat Terrain） developed by NIST（National Institute of Standards and Technology） is used to open out the bifurcation and singularity of smoke dispersion. As a result, the visualization of bifurcation and singularity is realized and swallow-alignment figures and swallow-shadow figures of CO, SO2 and PM10 in the smoke in the horizontal plane and the vertical plane in the downwind direction are produced through the use of three-dimensional scatter point technology and three-dimensional matrix technology. The simulation results provide scientific decision-making criteria for drawing up stupendous accident emergency response rescue and personnel evacuation plan.

关 键 词：油罐区火灾 分岔与奇异性 维散点技术 弥散燕列图 弥散燕影图 

分 类 号：X932[环境科学与工程—安全科学]