| Summary: | 碩士 === 國立成功大學 === 機械工程學系碩博士班 === 95 === With regard to the activation of the automatic fire sprinklers, a series of room-fire tests were carried out by means of gas burner.
The gas burner was placed in three different locations. When the burner was placed against the wall, the height of flame was higher and the movement of smoke was faster, and activation time was reduced. The effect of corner was greater than the effect of wall, so the activation time was the shortest when burner was at the corner. The activation time was longest when the gas burner was placed in the middle of the room. At the same time, all geometries were modeled using the computational fluid dynamics fire model, Fire Dynamics Simulator (FDS), for comparing numerically predicted results with the test data obtained.
The comparison between the experimental and predicted data has shown that the deviation of temperature was too high, and the reason was found to be the sensitivity of the thermalcouples, according to the result of the sensitivity tests of the thermalcouples the measured temperature differed from the actual environment temperature about 30~40℃.
In conclusion, the FDS has predicted, with good accuracy, the temperature history and the activation trend of the sprinklers.
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