Citation

Marshall NR, Harrison R. Fire Safety J. 1994; 22(3): 229-248.

Copyright

(Copyright © 1994, Elsevier Publishing)

DOI

unavailable

PMID

unavailable

Abstract

Smoke particles generated from the flaming combustion of polystyrene have been studied within a cumulative smoke test apparatus using a laser particle sizer.The effect of an aerofoil and a cylindrical type fan stirrer used to homogenise the smoke within the cumulative apparatus has also been studied.The results of this work demonstrate that an aerofoil fan can cause the removal of particles from the measurement volume and that this removal of particles is enhanced with fan speed.The cylindrical fan did not cause removal of particles when run at speeds up to 600 rpm. However there were signs of particle agglomeration when the fan speed was increased to 1000 rpm.Other mechanisms responsible for the loss of particles within the cumulative test method are discussed.An additional study has been carried out using an ad-hoc dynamic smoke test apparatus. The data from this work have been compared with those obtained from the cumulative smoke test apparatus.