Dry low combustion system with means for eliminating combustion noise

A combustor, comprising:

• a mechanical housing;
• a combustion chamber disposed within said mechanical housing and having a first end and a second end and an internal volume;
• a premixer coupled to said first end of the combustion chamber and in flow communication with said internal volume, said premixer including a swirler that delivers a swirling how of fuel and a gas to said internal volume through said first end;
• and
• a dome positioned at said first end of the combustion chamber and extending into said internal volume, said dome having an outer surface contoured to minimize flow separation of the swirling flow of fuel and the gas passing from said premixer and into said combustion chamber.

A gas turbine engine combustor, comprising:

• a cylindrical combustor chamber having a first end, a second end and an internal volume, said combustor chamber having a portion with a constant cross-sectional area, said combustor chamber having a plurality of first apertures in said portion and a plurality of second apertures in said portion, and said plurality of first apertures are axially spaced from said plurality of second apertures;
• a plurality of first fuel and gas tubular premixers coupled to said combustor chamber, each of said plurality of first fuel and gas tubular premixers in flow communication with one of said plurality of first apertures;
• and
• a plurality of second fuel and gas tubular premixers coupled to said combustor chamber, wherein each of said plurality of second fuel and gas tubular premixers in flow communication with one of said plurality of second apertures.

A combustor, comprising:

• a mechanical housing;
• a combustion chamber located within said mechanical housing and having an internal volume;
• and
• a premixer coupled with said combustion chamber, said premixer comprising:
• a tubular member having a first end and a second end and a flow passageway therebetween;
• a fuel manifold disposed in fluid communication with said flow passageway for the delivery of a fuel into said flow passageway;
• and
• twist mixer means for rotating the fluid flowing within said flow passageway, said twist mixer means positioned within said flow passageway.

At A combustor for burning a fuel and a gas mixture, comprising:

• a mechanical housing;
• a combustion chamber located within said mechanical housing and having a first
• end and a second end and an internal volume, said internal volume including a first burning zone and a second burning zone;
• a radial billow swirler portion located at said first end and in fluid communication with said internal volume, said swirler portion including a plurality of first fuel dispensers for delivering the fuel into the gas within said swirler portion, said swirler portion includes a plurality of vanes for swirling the fuel and gas into a swirled flow having only one of a clockwise and counterclockwise direction;
• a done positioned at said first end and extending into said internal volume, said dome configured to gradually expand the swirled flow received from said swirler portion as it moves adjacent an outer surface of said dome;
• a center body positioned within a space defined between said plurality of vanes;
• a first plurality of circumferentially spaced fuel and gas tubular premixers connected to said combustion chamber and in flow communication with said internal volume, each of said first plurality of fuel and gas tubular premixers adapted to deliver a premixed jet flow of the gas and fuel into said internal volume to interact with the swirled how from said radial inflow swirler portion;
• and
• a second plurality of circumferentially spaced hid and gas tubular premixers connected to said combustion chamber and in flow communication with said internal volume, each of said second plurality of fuel and gas tubular premixers adapted to deliver a premixed jet flow of the gas and fuel into said second burning zone.