Flow fields encountered in full-scale enclosure fires are highly three-dimensional and span a large spatial extent. Stereoscopic particle image velocimetry (SPIV) was applied to provide a large-scale planar interrogation of the flow of air available to a series of fires burning inside an enclosure. Time-averaged velocity fields across the doorway of the enclosure are presented. These flows are bi-directional and SPIV reveals that the time-averaged height of the region of flow reversal depends on location within the doorway. The volume flow rate of available air computed from the classical one-dimensional flow approach agrees well with the numerical integration using the velocity field provided by SPIV. Good agreement between the measured velocities for SPIV configurations optimized for seed particle displacements along the laser sheet axis and optimized for displacements perpendicular to the laser sheet demonstrate that large-scale SPIV measurements can be conducted with very good precision.
Experiments in Fluids – Springer Journals
Published: Apr 22, 2009
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