THE EFFECT OF DOOR ANGLE ON FIRE INDUCED FLOW THROUGH A DOORWAY (2002)
AuthorsCLARK, L. R.show all
This report investigates the effect of including a partially closed door in a doorway on the fire-induced flow through the doorway. This was investigated through a series of full-scale fire experiments. These were performed in two rooms that conformed to ISO 9705 standard connected by a single rectangular doorway. A comprehensive series of temperature, gas speed and gas concentration measurements were taken throughout these compartments. In the doorway a door was installed and the effect of placing this door at 20, 30, 40 and 60 degrees was investigated. The compartment was subjected to a series of small-scale steady state fires; the heat release rate of these fires was altered between 60, 120 and 180kW. The configuration of the compartments vent to the atmosphere was also altered. It was found that the addition of the doorway caused a change to the speed and temperature profile seen across the width of the doorway. The speed profile was seen to decrease across the width of the doorway. The neutral plane height was observed to change across the width of the doorway. The addition of the doorway also impacted on the behaviour of the flame within the compartment. The effect of the doorway on the system was seen to diminish as the door angle was increased. A significant discrepancy between temperature measurements made by aspirated and bare wire thermocouples was observed. This was particularly true in measurements made in the lower layer of the fire compartment.