【摘要】 小型空气净化装置具备安装灵活、占用空间小的优点，可用于城市隧道污染物控制。但在多台净化器连续布置情况下，净化气流与隧道通风的气流耦合特性，以及在实际非均匀分布特征下的污染物控制效果研究匮乏。该文以小型分布式静电除尘器为对象，对城市隧道纵向通风条件下设置多台净化装置的污染物控制效果进行模拟分析。对比相邻净化器间距、净化出流方向和净化器布局对污染物控制的效果，结果表明，水平射出的净化气流主要作用于上部空间，易导致相邻净化器之间的净化气流短路问题。较大的净化器间距有利于缓解短路，间距为210 m时，隧道全长平均污染物浓度降低8.7%。向下净化出流可有效改善短路，30°和60°净化后污染物浓度可显著降低10.9%和10.3%。净化器错位布置可改善短路，错位布置0.5 m和1 m时，污染物浓度可降低5.4%和2.2%。本研究为城市隧道内部污染物实际非均匀分布特征下，小型分布式净化装置的合理布局设计提供参考。更多还原

【Abstract】 Small air purification devices have the advantages of flexible installation and small space occupation, which can be used for pollutant control in urban tunnels. However, there is a lack of research on the airflow coupling characteristics of the purified airflow with tunnel ventilation under the continuous arrangement of multiple purifiers, and the pollutant control effect under the actual non-uniform distribution characteristics. In this study, the pollutant control effects of setting up multiple purification devices under longitudinal ventilation in urban tunnels are simulated and analyzed towards small electrostatic precipitators.The effects of adjacent purifier spacing, purification outflow direction and purifier layout on pollutant control are compared. The results show that the horizontally delivered purified airflow mainly acts on the upper space,which is prone to short-circuiting of the purified airflow between neighboring purifiers. Larger purifier spacing is beneficial to alleviate the short-circuit, and the average pollutant concentration of the whole length of the tunnel is reduced by 8.7% when the spacing is 210 m. The downward purified outflow can effectively improve the short-circuit, with pollutant concentrations significantly reduced by 10.9% and 10.3% at 30° and 60°purging. The staggered arrangement of purifiers can improve the short-circuit, and the pollutant concentration can be reduced by 5.4% and 2.2% when the staggered arrangement is 0.5 m and 1 m. This study provides a reference for the rational layout design of small distributed purification devices under the actual non-uniform distribution characteristics of pollutants inside urban tunnels.更多还原