Multi-pulse gas generator device and igniter with varied flow rates

A multi-pulse gas generator device, comprising:

• a pressure vessel;
• a first propellant disposed in the pressure vessel;
• a second propellant disposed in the pressure vessel;
• a barrier membrane configured to separate the first propellant and the second propellant;
• an igniter device configured to produce combustion gas of igniter charge to ignite the second propellant;
• and
• an igniter charge combustion gas exhaust device comprising at least one exhaust hole configured to exhaust the produced combustion gas of the igniter charge against the second propellant,
• wherein the barrier membrane comprises:
• a plurality of concavely-deformable portions configured to be concavely deformed by a pressure caused by combustion gas of the second propellant and/or the combustion gas of the igniter charge;
• and
• a plurality of convexly-deformable portions configured to be convexly deformed by the pressure caused by the combustion gas of the second propellant and/or the combustion gas of the igniter charge, and
• wherein a flow rate of the combustion gas of the igniter charge exhausted against a portion of the second propellant located outside of one of the plurality of concavely-deformable portions is larger than a flow rate of the combustion gas of the igniter charge exhausted against a portion of the second propellant located outside of one of the plurality of convexly-deformable portions.