Stud film cooling for double wall combustors

A combustor of a gas turbine engine, comprising:

• a combustion chamber,
• an outer shell disposed around the combustion chamber, and
• an inner shell disposed around the combustion chamber and between the combustion chamber and the outer shell, the inner shell including:
• a top side facing the outer shell,
• a bottom side facing the combustion chamber,
• a stud coupled to the top side of the inner shell and extending toward the outer shell, the stud configured to secure the outer shell to the inner shell,
• a first plurality of cooling holes disposed adjacent a first side of the stud and extending through the inner shell in a first direction that is rotated about 1° to about 45° counter-clockwise from an axial direction, and
• a second plurality of cooling holes disposed adjacent a second side of the stud and extending through the inner shell in a second direction that is rotated about 1° to about 45° clockwise from the axial direction, wherein each of the first plurality of cooling holes and the second plurality of cooling holes has at least one of a rectangular-shaped cross section, a triangular-shaped cross section, a hexagonal-shaped cross section, or a pentagonal-shaped cross section.

A gas turbine engine, comprising:

• a fan section,
• a compressor section adjacent the fan section, and
• a combustor section adjacent the compressor section, the combustor section including:
• a combustion chamber,
• an outer shell disposed around the combustion chamber, and
• an inner shell disposed around the combustion chamber and between the combustion chamber and the outer shell, the inner shell including:
• a top side facing the outer shell,
• a bottom side facing the combustion chamber,
• a stud coupled to the top side of the inner shell and extending toward the outer shell, the stud configured to secure the outer shell to the inner shell,
• a first plurality of cooling holes disposed adjacent a first side of the stud and extending through the inner shell in a first direction that is rotated about 1° to about 45° counter-clockwise from an axial direction, and
• a second plurality of cooling holes disposed adjacent a second side of the stud and extending through the inner shell in a second direction that is rotated about 1° to about 45° clockwise from the axial direction, wherein each of the first plurality of cooling holes and the second plurality of cooling holes has at least one of a rectangular-shaped cross section, a triangular-shaped cross section, a hexagonal-shaped cross section, or a pentagonal-shaped cross section.