会展中心火灾烟气控制的数值模拟研究-供热、供燃气、通风及空调工程专业论文.docx

茭文擒要A器STRCT 茭文擒要 A器STRCT In recent years,there are various new development and breakthroughs of the conference and／or exhibition building on也eif quantity,scale and functions continuously．Sometimes,such a building challenges the fire safety for its special structure and usage function． After comparing various research methods for large space building fire nowadays, 珏S of field simulation and FDS software,issued秘≥硅S毛are selected as research method and tool in this paper． In this paper,a typical conference and exhibition building is selected as research object．Through orthogonal numerical simulation experiment,compare and analyze the influence of each factor on mechanical smoke emission effect tO optimize design of somke control system of the conference and exhibition building．The study indicates that the positon of the exhaust port,the quantity of smoke exhaust as well as the interaction between the size and the quantity of exhaust ports arc important for mechanical smoke emission effect．Thus they should be taken into account more carefully． Fire phenomena,plume development and smoke layer development within exhibition hall a豫analyzed according to its numerical simulation reset．Duo lo the large space in the hall，the temperature。the speed and the concentration of the smoke plume minish rapidly．In case ofthe hall fire，the temperature dse ofthe smoke is IOW, the depth ofthe smoke layer fluctuates is largely and non-uniformly,and the smoke will deposit and diffuse easily．It sometimes interferes into fire detection and evacuation． Oversize exhaust speed through an exhaust port will lead to plug holing，which will reduce efficiency of smoke emission。Hence,critical quantity of smoke exhaust should be taken into ae20unt when designing somke control system． Comparing the influence on mechanical smoke emission effect from different exhaust port positons and different quantifies ofsmoke exhaust,it indicates that exhaust port 0n the roof is obviously better than on the wall．Becau