- Author
-
Fang, J. B.
- Title
- Static Pressures Produced by Room Fires. Interim Report.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Sponsor
- Department of Housing and Urban Development, Washington, DC
- Report
-
NBSIR 80-1984,
February 1980,
29 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
building fires
|
fire tests
|
flow measurement
|
furniture
|
interior finishes
|
residential buildings
|
room fires
|
static pressure
- Abstract
- The distributions and time-varying nature of the static pressures developed due to fires in residential recreation rooms were determined for a range of combustible load densities and different types of interior lining materials. The vertical pressure differentials with respect to the ambient static pressure for various fire sizes are satisfactorily correlated by a hydrostatic perfect gas model based on temperature measurements in enclosures and an orifice flow model and the calculated doorway inflow and outflow gas velocities are in good agreement with the measured values. The pressure differentials are found to reflect the locations of the neutral plane at the doorway and the thermal discontinuity within the fire room resonably well, and their magnitudes depend on the average upper gas temperature. Rates of mass flow in and out of the room calculated from the ceiling and the floor pressure differentials agree fairly well with those derived from the doorway gas velocity data.