Solid-propellant gas generators (SPGGs) have a number of aerospace applicat
ions, including munitions dispersion, pilot emergency escape systems, subma
rine missile launching, powering actuators and valves, and short-term power
supply. Recently, the increased demand for so-railed smart automotive airb
ags has increased the need for SPGG designs capable of real time, tailorabl
e output. Dual-combustion chamber gas generators provide several distinct a
dvantages over single-combustor units in systems where optimum performance
is needed at several operating conditions. The objective of this work is to
evaluate the attainable performance characteristics of a proposed dual-com
bustion chamber gas generator. The work includes a simulation of the transi
ent, thermochemical events associated with the firing of an SPGG, The simul
ations also include the dynamics of coupled events such as ignition, hetero
geneous combustion, and mass discharge. The baseline gas generator being si
mulated in this work is a hybrid SPGG inflator with two combustion chambers
. Studies are made of the distribution of propellant between combustion cha
mbers and the times at which the propellant within each combustion chamber
is fired.