Application of Scale Models in Designing Smoke Control Systems in Big Buildings

摘要

Smoke control systems are required in many tall big halls and long tunnels of big construction projects in the FarrnEast. There are challenges in applying fire models, particularly Computational Fluid Dynamics, to design suchrnsmoke controls systems. Scale model with the Froude number is convenient to perform for designing smoke controlrnsystems at the early stage. It appears to be a feasible tool together with fire models. If the design is supported byrnphysical scale models, smaller numbers of in-situ hot smoke tests in the actual building or tunnel are needed forrnapproval. In this paper, two examples of scale models are used to demonstrate the approach on designing smokerncontrol systems for a large cargo hall and on a tilted tunnel. Example 1 is the static smoke exhaust, or natural vent inrnthe cargo terminal. Example 2 is the smoke screen in a tilted tunnel. Experiments on the fire induced smokernmovement in the scale models of these two examples will be reported. The fire-induced smoke movement patternrnobserved in a scale model can be applied to design the smoke control systems in conjunction with fire models. Thisrnwould give more convincing results to the Authority on approving the preliminary design.