Abstract: In order to study the temperature distribution in the pipe gallery under the coupling effect of fire source height and fire blocking, a 1∶3 model of the reduced horseshoe pipe gallery was built. By changing the height of fire source and the opening and closing condition of one end of the pipe gallery, the temperature distribution in the pipe gallery was analyzed. The results showed that the fire source with a height of 10 cm has the highest maximum temperature compared with the other fire sources. In the vertical direction, the thickness of the smoke layer in the pipe gallery doesn't matter much to the height of the fire source and whether one end is closed. It is always 17 cm. The prediction formula of the maximum longitudinal temperature rise in the pipe gallery is also obtained from the experiment.

Key words:

fire source height, fire blocking, horseshoe pipe gallery, temperature distribution