Zusammenfassung
Smouldering fires in large storage facilities may be caused by glowing
nests or embedded hot bodies and remain undiscovered for very long
times. Due to large temperature gradients near the glowing nest in
a deposit of bulk material the detection of a smouldering fire is
difficult. This paper reports experimental investigations on thermal
conditions, which may cause or promote an ongoing smouldering process,
e.g. critical initial temperatures of embedded hot bodies or critical
initial sizes of glowing nests. Propagation velocities of smouldering
fires were found to be independent of calorific properties of three
combustible dusts.
Nutzer