Abstract

When a fire occurs in a tunnel, the flame will be tilted to a certain extent due to the effect of longitudinal ventilation. When the morphological characteristics change, it also affects the combustion and heat exchange behavior. In this study, a scaled test rig with a ratio of 1:6 was established. The variation of the inclination angle of the flame with the wind speed and the source power was obtained under different longitudinal wind speeds. Under the same fire source power, the inclination angle of the flame increases as the wind speed increases. The degree of tilt of the flame is not only related to the longitudinal wind speed, but also to the power of the fire source.

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