Experimental Study of the Sequence of Flow Reversals in Accessional Airways Parallel to a Fire
ZHOU Yan
SONG Shuang-lin
GUO Jiang-wei
XU Yang
LIN Bai-quan
Abstract：Air flow reversal in two ascensional airways parallel to a third on fire was studied by constructing a bench model. The model consisted of three tubes connected in parallel. One tube contained a burner to model the fire. The flow in the other two tubes was monitored with hot-wire anemometers and by smoke tracing. A series of tube lengths and initial flow velocities was studied and the time for flow reversal was determined. The results show that the flow reverses after different times depending upon the product of flow-tube length and initial flow velocity. The smaller this product the sooner the airflow will reverse in that tube.
Keywords：ventilation networktunnel fireairway parallel to fireflow reversalbench ex-periment
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 467-470,493 )