The equation of airdemand was derived from the theory of oxygen transfer in aeration.
根据曝气过程中氧转移的有关理论，推导出需气量的表达式；
2
An air water two phase flow model for airdemand computation for tunnels is developed in this paper.
结合工程实例，利用水气两相流数学模型计算明流长隧洞的通气量。
3
When determining airdemand for tunnel ventilation, the airdemand is taken from the bigger one between calculation of CO concentration index and smog concentration index.