- Author
-
Hagglund, B.
|
Nireus, K.
|
Werling, P.
- Title
- Experimental Study of the Smoke Spread Via Ventilation Ducts.
- Coporate
- FOA Defence Research Establishment, Tumba, Sweden
- Report
-
FOA-R-98-00870-311-SE; Scientific Report,
October 1998,
97 p.
- Keywords
-
ventilation
|
smoke
|
fire tests
|
pressure
|
fire protection
|
zone models
|
computational fluid dynamics
|
heptane
|
temperature
|
pressure rise
|
gas velocity
|
oxygen
|
carbon monoxide
|
fire growth
- Identifiers
- mechanical ventilation
- Abstract
- Full-scale smoke spread tests were performed with the fire room connected to adjacent spaces via ventilation ducts. Both exhaust and supply-exhaust ventilation systems were used in the tests. The fuel was heptane burnt in rectangular steel pans. The measured data presented are the temperature, pressure rise, gas velocities, oxygen and carbon monoxide concentration. The main purpose of the experimental work was to study the influence of pressure rise due to fire growth in a closed room on the smoke spread via ventilation ducts to adjacent spaces. Another purpose of the work was to generate experimental data to be compared with zone and computational fluid dynamics (CFD) models. With only the exhaust ventilation system running there was no spread of smoke to adjacent compartments. By running the exhaust ventilation system the risk of smoke spread to adjacent compartments via ventilation ducts may be reduced or even eliminated. However, with the supply-exhaust ventilation system running, it was seen from the tests that smoke was easily spread to adjacent compartments via the supply ventilation ducts. A simple zone model was used to compare the calculated results of temperature, mass flow and pressure rise with the measured data from two experiments. The comparison shows a reasonable agreement between calculated and measured data.