Cooling combustor wall boss
A combustor wall includes a panel, a boss, a wall aperture and multiple cooling apertures. The panel extends axially along and circumferentially about an axial centerline. The panel extends radially between a first panel surface and a second panel surface. The first panel surface forms a peripheral boundary of a combustion chamber. The boss projects out from the second panel surface. The boss extends circumferentially around and forms an outer peripheral boundary of the wall aperture. The wall aperture extends along a wall aperture centerline through the combustor wall to the first panel surface. The cooling apertures are arranged circumferentially about the wall aperture. Each of the cooling apertures extends along a cooling aperture centerline through the panel and/or the boss to the wall aperture. The cooling aperture centerline of a first of the cooling apertures is angularly offset from the wall aperture centerline by a first acute angle.
1. An apparatus for a turbine engine, comprising:
a combustor wall including a panel, a boss, a wall aperture and a plurality of cooling apertures;
the panel extending axially along and circumferentially about an axial centerline, the panel extending radially between a first panel surface and a second panel surface, and the first panel surface forming a peripheral boundary of a combustion chamber;
the boss projecting out from the second panel surface, and the boss extending circumferentially around and forming an outer peripheral boundary of the wall aperture;
the wall aperture extending along a wall aperture centerline through the combustor wall to the first panel surface; and
the plurality of cooling apertures arranged circumferentially about the wall aperture, each of the plurality of cooling apertures extending along a cooling aperture centerline through at least one of the panel or the boss to the wall aperture, the cooling aperture centerline of a first of the plurality of cooling apertures angularly offset from the wall aperture centerline by a first acute angle, and the cooling aperture centerline of a second of the plurality of cooling apertures angularly offset from the wall aperture centerline by a second acute angle that is different than the first acute angle.
2. The apparatus of claim 1 , wherein the first acute angle is between twenty degrees and forty-five degrees.
3. The apparatus of claim 1 , wherein the first acute angle is between forty-five degrees and seventy degrees.
4. The apparatus of claim 1 , wherein the cooling aperture centerline of the first of the plurality of cooling apertures is straight.
5. The apparatus of claim 1 , wherein the second of the plurality of cooling apertures circumferentially neighbors the first of the plurality of cooling apertures about the wall aperture.
6. The apparatus of claim 1 , wherein
a first inlet orifice into the first of the plurality of cooling apertures is disposed a first radial distance from the second panel surface; and
a second inlet orifice into the second of the plurality of cooling apertures is disposed a second radial distance from the second panel surface that is equal to the first radial distance.
7. The apparatus of claim 1 , wherein
a first outlet orifice from the first of the plurality of cooling apertures is disposed a first radial distance from the first panel surface; and
a second outlet orifice from the second of the plurality of cooling apertures is disposed a second radial distance from the first panel surface that is different than the first radial distance.
8. The apparatus of claim 1 , wherein a first inlet orifice into the first of the plurality of cooling apertures and a second inlet orifice into the second of the plurality of cooling apertures are longitudinally aligned along the wall aperture centerline.
9. The apparatus of claim 1 , wherein a first outlet orifice from the first of the plurality of cooling apertures and a second outlet orifice from the second of the plurality of cooling apertures are longitudinally offset along the wall aperture centerline.
10. The apparatus of claim 1 , wherein
a first section of the boss includes a first set of the plurality of cooling apertures, and the cooling aperture centerline of each cooling aperture in the first set of the plurality of cooling apertures is angularly offset from the wall aperture centerline by the first acute angle; and
a second section of the boss, circumferentially adjacent the first section, includes a second set of the plurality of cooling apertures, the cooling aperture centerline of one cooling aperture in the second set of the plurality of cooling apertures is angularly offset from the wall aperture centerline by the first acute angle, and the cooling aperture centerline of another cooling aperture in the second set of the plurality of cooling apertures is angularly offset from the wall aperture centerline by the second acute angle.
11. The apparatus of claim 10 , wherein
the first section extends circumferentially about the wall aperture centerline from a first end of the first section to a second end of the first section; and
the second section extends circumferentially about the wall aperture centerline from the first end of the first section to the second end of the first section.
12. The apparatus of claim 10 , wherein the first section extends between ninety degrees and two-hundred and seventy degrees about the wall aperture centerline.
13. The apparatus of claim 10 , wherein the second section extends between ninety degrees and two-hundred and seventy degrees about the wall aperture centerline.
14. The apparatus of claim 1 , wherein
the combustor wall further includes a heat shield and a shell;
the heat shield includes the panel, the boss and the plurality of cooling apertures, and the heat shield is attached to the shell; and
the boss projects out from the second panel surface to a distal end of the boss, and the distal end engages the shell.
15. The apparatus of claim 1 , further comprising an igniter received by the wall aperture.
16. A combustor for a turbine engine, comprising:
a combustor wall including a heat shield, a shell, a cooling cavity and a wall aperture extending along a wall aperture centerline through the combustor wall;
the heat shield attached to the shell, and the heat shield including a panel, a boss and a plurality of cooling apertures;
the boss projecting out from the panel, through the cooling cavity, to a distal end of the boss engaged with the shell, and the boss extending circumferentially around and forming an outer peripheral boundary of the wall aperture; and
the plurality of cooling apertures arranged circumferentially about the wall aperture, each of the plurality of cooling apertures extending along a cooling aperture centerline through at least one of the panel or the boss to the wall aperture, the cooling aperture centerline of a first of the plurality of cooling apertures angularly offset from the wall aperture centerline by a first acute angle, and the cooling aperture centerline of a second of the plurality of cooling apertures angularly offset from the wall aperture centerline by a second acute angle that is different than the first acute angle.
17. An apparatus for a turbine engine, comprising:
a combustor wall including a panel, a boss, a wall aperture and a plurality of cooling apertures;
the panel extending axially along and circumferentially about an axial centerline, the panel extending radially between a first panel surface and a second panel surface, and the first panel surface forming a peripheral boundary of a combustion chamber;
the boss projecting out from the second panel surface, and the boss extending circumferentially around and forming an outer peripheral boundary of the wall aperture;
the wall aperture extending along a wall aperture centerline through the combustor wall to the first panel surface, and the wall aperture including an inner surface formed by the boss and the panel;
the plurality of cooling apertures arranged circumferentially about the wall aperture, each of the plurality of cooling apertures extending along a cooling aperture centerline through at least one of the panel or the boss to the wall aperture, the cooling aperture centerline of a first of the plurality of cooling apertures angularly offset from the wall aperture centerline by a first acute angle, and the cooling aperture centerline of a second of the plurality of cooling apertures angularly offset from the wall aperture centerline by a second acute angle that is different than the first acute angle;
a first outlet orifice from the first of the plurality of cooling apertures disposed a first radial distance from the first panel surface, and the first outlet orifice disposed on the inner surface of the wall aperture; and
a second outlet orifice from the second of the plurality of cooling apertures disposed a second radial distance from the first panel surface that is different than the first radial distance from the first panel surface, and the second outlet orifice disposed on the inner surface of the wall aperture.
18. The apparatus of claim 17 , wherein the first outlet orifice and the second outlet orifice are disposed radially outboard of the first panel surface.
19. The apparatus of claim 17 , wherein
a first inlet orifice into the first of the plurality of cooling apertures is disposed a first radial distance from the second panel surface; and
a second inlet orifice into the second of the plurality of cooling apertures is disposed a second radial distance from the second panel surface that is equal to the first radial distance from the second panel surface.
20. The apparatus of claim 17 , wherein the first outlet orifice and the second outlet orifice are longitudinally offset along the wall aperture centerline.