摘要
在竖井送排式通风时,排风口和送风口之间可能产生短道流动,这种短道流动会阻碍隧道内的空气交换。文章利用有限元方法对送排风短道流场进行三维数值分析,研究表明:采用竖井送排式纵向通风时,短道内风流回流区总是存在的;回流区的范围L随短道长度的增加而显著减小;考虑到降低通风能耗和满足空气质量两方面的因素,短道的长度一般适宜取65m^80m。
When the sending and exhausting shaft is ventilated, short duct flow may occurred between outlet and inlet, which will baffle air exchange in highway tunnel. By applying finite - element method, this paper analyzed three - dimensionally the flow field of short duct, the result shows that the back flow in short duct exists always ; the range L of back flow can be reduced obviously as the length of short duct is increased; considering reducing energy dissipation and satisfying the air quality, the proper length of short duct should be 65 to 80 meters.
出处
《地下空间与工程学报》
CSCD
北大核心
2009年第2期402-405,共4页
Chinese Journal of Underground Space and Engineering
基金
交通部行业联合攻科技关项目(200335331404)
关键词
公路隧道
短道
数值模拟
优化
highway tunnel
short duct
numerical simulation
optimization
