Premixed direct injection nozzle for highly reactive fuels

A fuel/air mixing tube for use with highly reactive fuels in a fuel/air mixing tube bundle comprising;

• an outer tube wall extending axially along a tube axis between an inlet end and an exit end, said outer tube wall having a thickness extending between an inner tube surface having a inner diameter and an outer tube surface having an outer tube diameter;
• at least one fuel injection hole having a fuel injection hole diameter extending through said outer tube wall, at a location between said inlet end and said exit end, said fuel injection hole having an injection angle relative to said tube axis, said injection angle being in the range of about 30 to about 80 degrees;
• a recession distance extending between said fuel injection hole and said exit end along said tube axis, said recession distance being about 5 to about 100 times greater than said fuel injection hole diameter, including a plurality of fuel injection holes, wherein said injection angle of said at least one fuel injection holes differs from at least one other of said plurality of fuel injection holes.

A fuel/air mixing tube for use with highly reactive fuels in a fuel/air mixing tube bundle comprising;

• an outer tube wall extending axially along a tube axis between an inlet end and an exit end, said outer tube wall having a thickness extending between an inner tube surface having a inner diameter and an outer tube surface having an outer tube diameter;
• at least one fuel injection hole having a fuel injection hole diameter extending through said outer tube wall, at a location between said inlet end and said exit end, said fuel injection hole having an injection angle relative to said tube axis, said injection angle being in the range of about 30 to about 80 degrees;
• a recession distance extending between said fuel injection hole and said exit end along said tube axis, said recession distance being about 5 to about 100 times greater than said fuel injection hole diameter, including a plurality of fuel injection holes, wherein said injection angle of said at least one fuel injection holes differs from at least one other of said plurality of fuel injection holes and wherein said at least one fuel injection hole has a diameter that is different than at least one other of said plurality of fuel injection holes and wherein said injection angle of said at least one fuel injection hole is configured to vary as a function of said diameter of said fuel injection hole.