Gas turbine engine carburetor with flat retainer connecting primary and secondary swirlers
A gas turbine engine combustor carburetor includes forward and aft air swirlers. The aft swirler has a septum defining a primary venturi and a plurality of circumferentially spaced aft swirl vanes. The forward swirler has a plurality of circumferentially spaced forward swirl vanes extending forwardly from a flat annular radial flange of the forward swirler, an annular wall extending forwardly from a forward face of the septum and radially bounding an annular recess on the forward face, and the radial flange slidably retained within the annular recess and against the septum by a flat retainer attached to the annular wall of the septum. The flat retainer may be produced by stamping. An anti-rotation tab on the radial flange of the forward swirler extends radially through a corresponding notch in the annular wall.
1. A gas turbine engine combustor carburetor comprising:
forward and aft air swirlers having a longitudinal carburetor axis therethrough,
the aft swirler including a septum defining a primary venturi and a plurality of circumferentially spaced aft swirl vanes,
the forward swirler including a plurality of circumferentially spaced forward swirl vanes extending forwardly from a flat annular radial flange of the forward swirler,
an annular wall extending forwardly from a forward face of the septum radially bounding an annular recess on the forward face, and
the radial flange being slidably retained within the annular recess and against the septum by a flat retainer attached to the annular wall of the septum.
2. A carburetor as claimed in claim 1 further comprising the flat retainer having been produced by stamping.
3. A carburetor as claimed in claim 1 further comprising an anti-rotation tab on the radial flange extending radially through a corresponding notch in the annular wall.
4. A carburetor as claimed in claim 3 further comprising the anti-rotation tab being rectangular in shape and having a width at least 33% of a forward swirler flange diameter of the forward swirler.
5. A carburetor as claimed in claim 3 further comprising the anti-rotation tab being rectangular in shape and having a width at least 20% of a forward swirler flange diameter of the forward swirler.
6. A carburetor as claimed in claim 3 further comprising the anti-rotation tab being rectangular in shape and having a width in a range of between 20%–33% of a forward swirler flange diameter of the forward swirler.
7. A carburetor as claimed in claim 3 further comprising the anti-rotation tab being rectangular in shape and having a width the greater of at least 33% of a forward swirler flange diameter of the forward swirler or 0.2 inches.
8. A carburetor as claimed in claim 3 further comprising the anti-rotation tab being rectangular in shape and having a width the greater of at least 20% of a forward swirler flange diameter of the forward swirler or 0.2 inches.
9. A carburetor as claimed in claim 3 further comprising the anti-rotation tab being rectangular in shape and having a width the greater of a range of between 20%–33% of a forward swirler flange diameter of the forward swirler or 0.2 inches.
10. A carburetor as claimed in claim 3 further comprising the flat retainer having been produced by stamping.
11. A carburetor as claimed in claim 10 further comprising the anti-rotation tab being rectangular in shape and having a width at least 33% of a forward swirler flange diameter of the forward swirler.
12. A carburetor as claimed in claim 10 further comprising the anti-rotation tab being rectangular in shape and having a width at least 20% of a forward swirler flange diameter of the forward swirler.
13. A carburetor as claimed in claim 10 further comprising the anti-rotation tab being rectangular in shape and having a width in a range of between 20%–33% of a forward swirler flange diameter of the forward swirler.
14. A carburetor as claimed in claim 10 further comprising the anti-rotation tab being rectangular in shape and having a width the greater of at least 33% of a forward swirler flange diameter of the forward swirler or 0.2 inches.
15. A carburetor as claimed in claim 10 further comprising the anti-rotation tab being rectangular in shape and having a width the greater of at least 20% of a forward swirler flange diameter of the forward swirler or 0.2 inches.
16. A carburetor as claimed in claim 10 further comprising the anti-rotation tab being rectangular in shape and having a width the greater of a range of between 20%–33% of a forward swirler flange diameter of the forward swirler or 0.2 inches.