Zusammenfassung
A numerical study is presented of the phenomenology of ignition, and
initiation of combustion waves, in a model representing a spherical
power source embedded in a concentric spherical volume of combustible
material of relatively low exothermicity. For simplicity, one-step
chemistry is assumed, and diffusion of oxygen or gaseous products
is neglected. The results show unexpected behaviour for small-sized
power sources, in which, over a range of source radii, there are
two distinct critical values for the power, with an apparently safe
region occupying some of the range between them. Possible safety
implications for chemical plant operation are discussed.
Nutzer