- Author
-
Bryant, R. A.
- Title
- Comparison of Gas Velocity Measurements in a Full-Scale Enclosure Fire.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Journal
-
Fire Safety Journal,
Vol. 44,
No. 5,
792-800,
July 2009
- Keywords
-
enclosures
|
gas velocity
|
velocity measurement
|
natural gas
|
probes
|
gas constants
|
thermocouples
|
heat release rate
|
experiments
|
doorways
|
floors
|
air flow
- Identifiers
- Particle Image Velocimetry (PIV); Stereoscopic Particle Image Velocimetry (SPIV); bi-directional impact-pressure probes; flow measurement; fire-induced flow
- Abstract
- Gas velocity measurements were conducted in the doorway of an enclosure containing a natural gas fire. Two independent measurement techniques, Stereoscopic Particle Image Velocimetry (SPIV) and bi-directional impact-pressure probes, were utilized for comparison - the first such comparison for a fire-induced flow in a full-scale structural fire. Gas velocities inferred from the bi-directional probe measurements were consistently greater than SPIV measurements in a region of the flow between the floor and the flow interface. The comparison revealed that a measurement bias exists in the bi-directional probe technique. Estimates of the relative magnitude of the bias were inferred from the results.