Combustion-powered flow control actuator with external fuel injector

A flow control system comprising:

• a flow control actuator, the flow control actuator comprising:
• at least one side wall, the at least one side wall forming a cylindrical combustion chamber;
• an upstream wall coupled to an upstream end of the at least one side wall;
• a downstream cap coupled to a downstream end of the at least one side wall, the downstream cap comprising at least one orifice;
• at least one fuel injector disposed in at least one of the upstream wall and the at least one sidewall;
• at least one air inlet disposed in at least one of the upstream wall and the at least one sidewall;
• and
• an external fuel injector adjacent to the at least one side wall on the exterior of the cylindrical combustion chamber;
• and
• a target surface disposed at a downstream end of the flow control actuator,
• wherein fuel from the at least one fuel injector and air from the at least one air inlet ignite in the combustion chamber and disperse at the target surface.

A flow control actuator comprising:

• at least one side wall, the at least one side wall forming at least a portion of a combustion chamber;
• an upstream wall coupled to an upstream end of the at least one side wall;
• a downstream cap coupled to a downstream end of the at least one side wall, the downstream cap comprising at least one orifice;
• at least one fuel injector disposed in at least one of the upstream wall and the at least one sidewall;
• at least one air inlet disposed in at least one of the upstream wall and the at least one sidewall;
• an external fuel injector adjacent to the at least one side wall on the exterior of the cylindrical combustion chamber;
• and
• at least one igniter disposed in at least one of the upstream wall and the at least one side wall,
• wherein the at least one igniter is disposed between about 0% and about 50% of the distance from the upstream wall to the downstream cap.