Influence of air distribution modes in civil air defense basement on carbon dioxide concentration distribution in wartime

In order to protect the living environment and effectively control harmful gas composition in basement of civil air defense wartime, this paper studies pollutants a project Jinan by CFD numerical simulation technology, simulates CO 2 concentration distribution under three different forms defense. The results show that when second-class shelter reaches high-density population environment, conditions form side supply upper return building meet personnel. average is 7200 ppm, but central area pollutant with an about 14.3%, highest 17000 which affects physiological function simulated modes supply, lower more uniform, 6000 ppm 5500 ppm. effect best, where 23.6% than scheme 8.3% outlet scheme. uniform there no aggregation point. Under special layout conducive control.