Film cooled combustor liner and method of making the same

A gas turbine combustor liner comprising:

• a first annular panel section having a forward end and an aft end and a first cooling nugget formed at said forward end thereof;
• a first row of axially oriented cooling holes formed in said first cooling nugget;
• a second annular panel section having a forward end and an aft end and a second cooling nugget formed at said forward end thereof, said second annular panel section being joined at its forward end to said aft end of said first annular panel section;
• a second row of axially oriented cooling holes formed in said second cooling nugget, said second row of axially oriented cooling holes being arranged in a preferential cooling pattern comprising a plurality of arrays, wherein each said array comprises a first set of cooling holes having a first diameter and a second set of cooling holes having a second diameter that is smaller than said first diameter;
• a row of radially oriented cooling holes formed in said second cooling nugget;
• and
• at least one igniter tower formed in said first annular panel section, said at least one igniter tower being circumferentially aligned with one of said second sets of cooling holes and said row of radially oriented cooling holes.

A method of making a combustor liner of the type having a first annular panel section having a first cooling nugget formed at one end thereof, a second annular panel section having a second cooling nugget formed at one end thereof, and at least one igniter tower formed in said first annular panel section, said method comprising the steps of:

• forming a first row of cooling holes in said first cooling nugget;
• forming a second row of cooling holes in said second cooling nugget, said second row of cooling holes being arranged in a preferential cooling pattern comprising a plurality of arrays, wherein each said array comprises a first set of cooling holes having a first diameter and a second set of cooling holes having a second diameter that is smaller than said first diameter;
• and
• circumferentially aligning with one of said second sets of cooling holes with said at least one igniter tower.