公路隧道能见度理论分析  

Theoretical Analysis of Visibility in Road Tunnels

作　　者：朱春[1,2] 张旭[1] Marawska. L 

机构地区：[1]同济大学机械工程学院,上海200092 [2]昆士兰科技大学

出　　处：《地下空间与工程学报》2010年第2期306-312,共7页Chinese Journal of Underground Space and Engineering

基　　金：2008年国家留学基金委资助项目(2008103042)

摘　　要：公路隧道中,能见度是在正常运营和火灾事故条件下必须考虑的主要因素,但目前国内外缺乏有关隧道能见度方面理论研究。作者根据Beer-Lambert定律,首先澄清公路隧道内能见度与消光系数关系;然后根据M ie理论分析气体和颗粒物对能见度的吸收和散射作用,指明大气消光系数线性计算式的依据与实际意义;结合公路隧道内的污染物排放特点,最后提出隧道内消光系数算式。该算式可用于隧道内通风量计算,分析细粒子、粗粒子以及NO2影响能见度水平,并为隧道通风运营管理提供依据。Visibility is a driving force in normal operation as well as in incident fire situation in road tunnels, however, the theoretical research on tunnel visibility is scarce. Based on law of Beer-Lambert, the correlation between visibility in tunnels and extinction coefficient is clarified firstly. According to Mie theory, the light absorption and scattering from gaseous and particle matters are analyzed, and the atmospheric extinction coefficient linear equation is presented logically. In view of emission characters in road tunnels, the road tunnel extinction coefficient equation is derived finally. This equation can be used as ventilation calculation as well as analysis factors sensitivity of fine mass, coarse mass and NO2 in road tunnels, and also provides foundation for the management of ventilation operation in tunnels.

关 键 词：能见度 消光系数 公路隧道 MIE理论 质量消光率 

分 类 号：X831[环境科学与工程—环境工程]