- Author
-
Andersson, P.
|
Isaksson, S.
|
Holmstedt, G.
- Title
- Experimental Studies and CFD Simulation of a Fire Plume for Prediction of Smoke Detector Activation.
- Coporate
- Lund Univ., Sweden
- Report
-
Project 627-951,
1997,
43 p.
- Keywords
-
smoke detectors
|
computational fluid dynamics
|
simulaiton
|
fire plumes
|
temperature measurements
|
velocity measurement
|
soot
|
experiments
- Abstract
- Experimental measurements of temperature, velocity, concentration (O2, CO2 and CO) and soot volume fraction have been conducted in the fire plume region above a propylene flame and compared with CFD simulations and to some extent with a plume formula. three different approaches for simulation of the soot volume fraction are discussed, i.e., couple the soot volume fraction to one of the concentraion fields or the temperature field, add the soot as an inert gas or use a soot formation model. The soot formation models are still under development and have the capability to include the smoke ageing processes. Coupling the soot to a concentration field or treat it as an inert gas gives results in agreement with the measured values. However the bouancy controlled k-e model underpredicts the width of the plume considerably. An alternative turbulence model used in this paper gives results in close agreement with the experiments.