摘要
研究竖井结构内有毒烟气的运动规律的特点,对于发展烟气控制技术,制定合理的人员安全疏散预案具有重要意义。通过高层竖井小尺寸实验,较为全面系统地研究了典型竖井结构内CO浓度场分布以及迁移运动规律。发现相同实验条件下,竖井内CO浓度变化过程随着竖井结构的不同而不同。同时结合FDS模拟及数值分析,讨论了竖井结构形式对毒性烟气迁移的影响。
This paper aims to introduce its author＇ s simulated study on the spreading characteristics and smoke toxicity transferring regularities in a typical vertical shaft so as to disclose the myth of the flue gas control technology and promote the establishment of a reasonable evacuation plan for greater staff-rescuing security. As is known, it is one of the most important factors leading to mining and human casualty is toxic smoke assault. Though smoke toxicity has become a key research topic both at home and abroad, little research has been done on the toxic smoke propagation and movement, particularly, in the shaft wells. The focus of this paper turns to the high-level-experimen- tal shaft of small size and intends to discover the CO concentration distribution and migration movement in a typical shaft structtrre. At the same time, it has integrated its FDS simulation and numerical analysis into its study of the toxic effects of gas transfer. The results of its research prove that the concentration of CO usually changes with the chimney effect mechanism with the regulations of CO in different shaft configurations somewhat different under the same experimental condition. Therefore, the concentration of CO changes most slowly in a closed shaft structure, with the fastest change taking place in an open shaft when the fire source located in a layer under the same experimental condition. And, as a result, differences between numerical simulations and experiments can be traced. Since the FDS simulation proves not suitable for simulating a poor ventilation process, sometimes danger caused by the smoke-movement ends to be exaggerated. However, such simulations can still account for the characteristics of smoke-fire spreading processes.
出处
《安全与环境学报》
CAS
CSCD
2007年第6期103-106,共4页
Journal of Safety and Environment
基金
香港裘挫基金研究项目(5-2H46)
国家自然科学基金重大国际合作研究项目(50320120156)
关键词
消防工程
竖井结构
烟气毒性
实验研究
数值模拟
CO
fire engineering
shaft configuration
smoke toxicity
experimental study
numerical simulation
CO
