Cooled conduit for conveying combustion gases

A conduit through which hot combustion gases pass in a gas turbine engine, the conduit comprising:

• a wall structure having a central axis and defining an inner volume of the conduit for permitting hot combustion gases to pass through the conduit, said wall structure comprising:
• a forward end;
• an aft end axially spaced from said forward end, said aft end defining a combustion gas outlet for the hot combustion gases passing through the conduit;
• a resonator structure including a plurality of resonator boxes for attenuating acoustic vibrations with the engine;
• and
• a plurality of generally radially outwardly extending protuberances located in a circumferential band in said wall structure, said protuberances each including only one cooling fluid passage formed therethrough for permitting cooling fluid to enter said inner volume and wherein said protuberances are aligned with said resonator structure;
• and
• wherein at least one of said protuberances defines a front portion, a pair of side portions, a radially outer portion including a radially outermost wall portion, and a back portion, each of said front and back portions extending at an angle with respect to said central axis, and said cooling fluid passage of said protuberance extends through said radially outermost wall portion of said protuberance.

A conduit through which hot combustion gases pass in a gas turbine engine, the conduit comprising:

• a wall structure having a central axis and defining an inner volume of the conduit for permitting hot combustion gases to pass through the conduit, said wall structure comprising:
• a forward end;
• an aft end axially spaced from said forward end, said aft end defining a combustion gas outlet for the hot combustion gases passing through the conduit;
• and
• a plurality of generally radially outwardly extending protuberances located in a circumferential band in said wall structure, said protuberances including:
• a first section comprising only one cooling fluid passage formed therethrough for permitting cooling fluid to enter said inner volume, said first section having a first width in the circumferential direction and said cooling fluid passage of said protuberance extends through a radially outermost wall portion of said first section of said protuberance;
• and
• a second section located axially downstream from said first section and having a second width in the circumferential direction greater than said first width so as to cause cooling fluid passing through it to diverge in the circumferential direction as it enters into said inner volume;
• and
• a plurality of resonator boxes extending radially outwardly from said wall structure, said resonator boxes attenuating acoustic vibrations within the engine, wherein all of said protuberances are formed in said respective resonator boxes.