隧道内安装的两个最重要的消防和生命安全系统是通风系统和固定灭火系统。这两种方法都有助于控制火势，让隧道内的乘客安全逃生。但同时运行时，这两个系统可能会相互影响，从而降低彼此的效率。在华盛顿州西雅图90号州际公路的贝克山和默瑟岛隧道内进行了一系列全尺寸火灾、通风和固定灭火试验。灭火系统在贝克山隧道进行了实火测试，以观察系统的灭火能力。横向通风系统与固定灭火系统一起进行试验，以检查通风系统引起的水颗粒位移。位移试验的计算流体动力学（CFD）模拟在ANSYS Fluent中运行。 水滴和空气速度的漂移与试验数据进行了比较。对纽瓦克国际自由机场a航站楼拟建的行李隧道进行了类似的CFD模拟，该隧道配备了喷射风机以及火灾场景中的主动消防和生命安全系统。NIST的火灾动力学模拟器（FDS）用于模拟A航站楼的行李隧道，以解决隧道内行李和拖船火灾的风险。通风系统会改变水滴的路径，控制烟雾的传播，而水滴的引入会使烟雾和空气循环，降低能见度，但有助于克服背景层，也会阻碍通风系统的气流。这些相互作用对可见度有很大影响，在正确设计消防和生命安全系统时必须加以考虑。引文:ASHRAE论文CD:2014 ASHRAE年会，华盛顿州西雅图

Two of the most important fire and life safety systems installed in tunnels are the ventilation system and the fixed fire suppression system. Both aid in controlling the fire to allow for the safe egress of tunnel occupants. But operated at the same time, the two systems may impact each other such that they may reduce the efficacy of one another. A series of full scale fire, ventilation, and fixed fire suppression tests were performed in Mount Baker and Mercer Island Tunnel, part of Interstate 90, in Seattle, Washington. The suppression system was tested in Mount Baker Tunnel on a live fire to observe the fire extinguishing capabilities of the system. The transverse ventilation system was tested in tandem with the fixed fire suppression system to examine the displacement of water particles due to the ventilation system. Computational fluid dynamic (CFD) simulations of the displacement tests were run in ANSYS Fluent. The drift of the water droplets and air velocities are compared to the test data. Similar CFD simulations of a proposed baggage tunnel in Terminal A of Newark International Liberty Airport with jet fans and active fire and life safety systems in a fire scenario are examined. NIST's Fire Dynamics Simulator (FDS) was used to model the baggage tunnel for Terminal A to address the risk of a baggage and tug fire in the tunnel. The ventilation system alters the path of the water droplets and controls the spread of smoke while the introduction of water droplets circulates the smoke and air, decreasing visibility but helping to overcome backlayering, and also impedes the airflow of the ventilation system. These interactions have large implications on visibility and must be considered to properly design fire and life safety systems.