| Summary: | 碩士 === 國立高雄第一科技大學 === 環境與安全衛生工程所 === 94 === Abstract
The numerical simulation and small-scale burning tests were conducted to study the
variations in smoke temperature and velocity for investigating smoke movement
phenomenon in a long corridor.
The demonstration of scale law carried out by FDS model showed that good results
were achieved between the model and prototype for the physical properties of smoke
movement, such as gas temperature, velocity, and flame height as a specific geometric
scale are selected to keep the flame structures between full-scale and small scale model
is similar.
On the other hand, smoke temperature under the ceiling and velocity in a corridor were
studied experimentally and numerically. The shadowgraph method and laser sheet
method were used to detect the smoke front for deducing the velocity. Meanwhile, the
20 points of thermocouples were used to measure the smoke temperature under the
ceiling.
Predicted FDS results on flame structure and smoke temperature for the near field of
fire agreed not well with experiments. A possible reason is the boundary conditions
and burning parameters were different in this study. Further, the results showed that
temperature distribution along a corridor fell into exponential decays, but the decay of
velocity along the corridor was not evident. The numerical and experimental results
III
investigated the velocity of smoke front was approaching to a constant value. The
depth of smoke flow under the ceiling was 1.5m approximately.
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