描述了在模拟典型多层开放式平面建筑的实验消防塔中进行的试验，以调查影响防止烟气回流所需临界风速的各种参数。调查的参数包括火灾温度、带外墙通风口和排气扇的防火楼层的通风、楼梯门开启角度、打开的楼梯门数量以及楼梯加压的空气注入方法。关键词:测试、气流、速度、烟雾、烟雾通风、加压、加压楼梯、加速: 研讨会，ASHRAE Trans。1991年，第97卷，第2部分

Describes tests conducted in an experimental fire tower simulating a typical multi-storey, open floor plan building to investigate various parameters affecting critical air velocities needed to prevent smoke backflow. The parameters investigated were fire temperature, venting of the fire floor with exterior wall vents and an exhaust fan, angle of stair door opening, number of open stair doors and method of air injection for stair pressurisation.KEYWORDS: Testing, air flow, speed, smoke, smoke ventilation, pressurisation, pressurised stairs, Canada