The invention discloses an intelligent layering and guiding device for highway tunnel
fire smoke and a control method, and relates to the technical field of tunnel
fire safety, a
smoke flow Froude number is introduced as a
direct control target, the parameter represents the ratio of
smoke flow
inertia force to
buoyancy force, the numerical value directly determines the stability of a layering interface, and the layering interface can be directly controlled. The Froude number of each subarea of the tunnel is calculated in real time through a sensing network and is compared with a critical value calibrated through an experiment, when a real-time value is lower than the critical value, it is indicated that
inertia force is relatively insufficient, the
buoyancy effect is dominant, and
instability and entrainment are likely to happen to an interface between a
smoke layer and lower
cold air, and then according to a
control algorithm, the smoke layer and the lower
cold air are controlled. The micro jet fan applies directional
inertia force to a smoke layer by adjusting the angle and the speed, the intelligent induction smoke outlet optimizes
local pressure difference and flow by adjusting the opening degree and assists in maintaining flowing, the smoke flowing state is actively locked in a stable layered flow interval, and mixing and
sedimentation caused by flow state
instability are prevented.