Liner of a gas turbine engine combustor including dilution holes with airflow features

1. A gas turbine engine combustor comprising:

a liner defining at least in part:

a combustion chamber,

a first side exposed to the combustion chamber,

a second side opposite the first side,

a plurality of cooling holes extending from the second side to the first side, and

a dilution hole extending from the second side to the first side,

wherein the dilution hole is larger in diameter than each of the plurality of cooling holes,

wherein the liner comprises an airflow feature on the first side of the liner adjacent to the dilution hole, a mass of which extends into the combustion chamber to increase a cooling of the liner,

wherein the combustion chamber defines an airflow direction over the dilution hole on the first side of the liner and a transverse direction perpendicular to the airflow direction,

wherein the airflow feature is positioned adjacent to the dilution hole along the transverse direction,

wherein the dilution hole of the liner is a first dilution hole, wherein the liner further defines a second dilution hole spaced from the first dilution hole along the transverse direction, and

wherein the airflow feature is positioned between the first dilution hole and the second dilution hole.

2. The gas turbine engine combustor of claim 1 ,

wherein the airflow feature defines a perimeter shape, and

wherein the perimeter shape is an ellipse, a circle, or an oval.

3. The gas turbine engine combustor of claim 1 ,

wherein the airflow feature defines a perimeter shape, and

wherein the perimeter shape is half of an ellipse, half of a circle, or half of an oval.

4. The gas turbine engine combustor of claim 1 ,

wherein the first dilution hole defines a diameter,

wherein the airflow feature defines a width, and

wherein the width of the airflow feature is greater than 0.25 times the diameter and less than 5 times the diameter.

5. The gas turbine engine combustor of claim 1 ,

wherein the first dilution hole defines a diameter, wherein the airflow feature defines a height, and

wherein the height of the airflow feature is greater than 0.25 times the diameter and less than 5 times the diameter.

6. The gas turbine engine combustor of claim 1 ,

wherein the liner further defines a secondary cooling hole through the liner, and

wherein the secondary cooling hole defines an outlet on the airflow feature.

7. The gas turbine engine combustor of claim 6 ,

wherein the secondary cooling hole extends generally along the airflow direction.

8. The gas turbine engine combustor of claim 6 ,

wherein the secondary cooling hole extends generally opposite the airflow direction.

9. The gas turbine engine combustor of claim 1 , wherein the airflow feature defines an aerodynamic profile.

10. The gas turbine engine combustor of claim 1 ,

wherein the gas turbine engine combustor defines a longitudinal direction, and

wherein the airflow direction defines a swirl angle greater than zero with the longitudinal direction.

11. The gas turbine engine combustor of claim 1 ,

wherein the first dilution hole has a diameter that is at least five times that of a diameter of one of the plurality of the cooling holes.

12. A gas turbine engine combustor comprising:

a liner defining at least in part:

a combustion chamber,

a first side exposed to the combustion chamber,

a second side opposite the first side,

a plurality of cooling holes extending from the second side to the first side, and

a dilution hole extending from the second side to the first side,

wherein the dilution hole is larger in diameter than each of the plurality of cooling holes,

wherein the liner comprises an airflow feature on the first side of the liner adjacent to the dilution hole, a mass of which extends into the combustion chamber to increase a cooling of the liner,

wherein the combustion chamber defines an airflow direction over the dilution hole on the first side of the liner and a transverse direction perpendicular to the airflow direction,

wherein the airflow feature is positioned adjacent to the dilution hole along the transverse direction,

wherein the airflow feature is a first airflow feature,

wherein the liner further comprises a second airflow feature on the first side of the liner extending into the combustion chamber, and

wherein the second airflow feature is positioned on an opposite side of the dilution hole from the first airflow feature along the transverse direction.

13. A gas turbine engine combustor comprising:

a liner defining at least in part:

a combustion chamber,

a first side exposed to the combustion chamber,

a second side opposite the first side,

a plurality of cooling holes extending from the second side to the first side, and

a dilution hole extending from the second side to the first side,

wherein the dilution hole is larger in diameter than each of the plurality of cooling holes,

wherein the liner comprises an airflow feature on the first side of the liner adjacent to the dilution hole, a mass of which extends into the combustion chamber to increase a cooling of the liner,

wherein the combustion chamber defines an airflow direction over the dilution hole on the first side of the liner and a transverse direction perpendicular to the airflow direction,

wherein the dilution hole of the liner is a first dilution hole,

wherein the liner further defines a second dilution hole spaced from the first dilution hole along the transverse direction,

wherein the airflow feature is positioned between the first dilution hole and the second dilution hole, and

wherein the liner further defines a third dilution hole extending through the liner and defining an outlet on the airflow feature.

14. The gas turbine engine combustor of claim 13 ,

wherein the first dilution hole defines an outlet having a cross-sectional area,

wherein the third dilution hole defines an outlet having a cross-sectional area, and

wherein the cross-sectional area of the outlet of the third dilution hole is less than the cross-sectional area of the outlet of the first dilution hole.

15. A gas turbine engine combustor comprising:

a liner defining:

a first side,

a second side opposite the first side,

a plurality of cooling holes extending from the first side to the second side,

a dilution hole extending between the first side and the second side and defining a diameter, and

a combustion chamber with the first side being exposed to the combustion chamber,

wherein the dilution hole is larger in diameter than each of the plurality of cooling holes,

wherein the liner comprises an airflow feature on the first side of the liner adjacent to the dilution hole, a mass of which extends into the combustion chamber to increase a cooling of the liner,

wherein the airflow feature defines an aerodynamic profile and a length greater than or equal to the diameter of the dilution hole,

wherein the combustion chamber defines an airflow direction over the dilution hole on the first side of the liner and a transverse direction perpendicular to the airflow direction,

wherein the airflow feature is positioned adjacent to the dilution hole along the transverse direction,

wherein the dilution hole of the liner is a first dilution hole, wherein the liner further defines a second dilution hole spaced from the first dilution hole along the transverse direction, and

wherein the airflow feature is positioned between the first dilution hole and the second dilution hole.

16. The gas turbine engine combustor of claim 15 ,

wherein the airflow feature is positioned downstream of the first dilution hole along the airflow direction,

wherein the liner defines an indentation in the first side of the liner, and

wherein the indentation is positioned adjacent to the first dilution hole along the airflow direction at a location upstream of the first dilution hole along the airflow direction.

17. The gas turbine engine combustor of claim 15 ,

wherein the diameter that is at least five times that of a diameter of one of the plurality of the cooling holes.