Three-pulse gas generator and operation method thereof

A multi-pulse gas generator comprising:

• a pressure vessel;
• a front head plate fixed to the pressure vessel;
• a rear head plate fixed to the pressure vessel;
• an outer propellant disposed in the pressure vessel and having a tubular shape;
• an intermediate propellant disposed inside the outer propellant and having a tubular shape;
• an inner propellant disposed inside the intermediate propellant and having a tubular shape;
• a first igniter configured to generate energy for igniting the intermediate propellant;
• a second igniter configured to generate energy for igniting the outer propellant and the inner propellant;
• a first energy transfer portion configured to transfer the energy generated by the second igniter to the outer propellant;
• a second energy transfer portion configured to transfer the energy generated by the second igniter to the inner propellant;
• an internal structure disposed inside the inner propellant and fixed to the pressure vessel;
• a first barrier membrane disposed between the outer propellant and the intermediate propellant so as to isolate the outer propellant and the intermediate propellant from each other;
• a second barrier membrane disposed between the intermediate propellant and the inner propellant so as to isolate the intermediate propellant and the inner propellant from each other;
• a third barrier membrane disposed to cover a rear end surface of the outer propellant and supported by the pressure vessel;
• and
• a fourth barrier membrane disposed to cover a rear end surface of the inner propellant and supported by the internal structure,
• wherein the outer propellant is supported on its outer surface by the pressure vessel,
• wherein the inner propellant is supported on its inner surface by the internal structure,
• wherein the first barrier membrane and the third barrier membrane are attached to each other and configured to separate from each other in response to combustion of the outer propellant,
• wherein the second barrier membrane and the fourth barrier membrane are attached to each other and configured to separate from each other in response to combustion of the inner propellant,
• wherein the outer propellant, the intermediate propellant and the inner propellant are disposed between the front head plate and the rear head plate,
• wherein the internal structure is supported on its first end by the front head plate, and
• wherein the internal structure is supported on its second end by the rear head plate.