Ceiling jet is a classical scientific problem of building fire dynamics.In this work,a series of experiments were carried out to analyze the impact of sub-atmospheric pressures on the ceiling temperature profile induced by wall-attached fires in the corridor.It was found that with the decrease of atmospheric pressure,the ceiling flame extension structure changed from a semi ellipse to a"U"shape.The maximum temperature rises and longitudinal temperature decay beneath the ceiling under various sub-atmospheric pressures were revealed.The prediction models for the temperature profile in the center and both sides beneath the ceiling in the corridor were proposed,considering the impact of different sub-atmospheric pressures.
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