Manufacture and installation of diffuser flow mixing lobes

A turbomachine comprising:

• a compressor portion;
• a turbine portion operatively connected to the compressor portion, the turbine portion including a turbine outlet;
• a combustor assembly including at least one combustor that fluidically connects the compressor portion and the turbine portion;
• an exhaust diffuser is fluidically connected to the turbine outlet, the exhaust diffuser including an inner surface;
• and
• a plurality of flow mixing lobes arranged in a circumferential array on the inner surface of the exhaust diffuser, each of the plurality of flow mixing lobes comprising:
• a first flange member including a first leading end, a first trailing end, and an intermediate portion extending therebetween, the first flange member being mechanically linked to the inner surface of the exhaust diffuser;
• a second flange member including a second leading end, a second trailing end, and an intermediate section extending therebetween, the second flange member being mechanically linked to the inner surface of the exhaust diffuser;
• a first leg portion having a first end extending from the first flange member, a second end, a leading edge extending between the first and second ends, and a trailing edge extending between the first and second ends spaced from the leading edge, wherein the leading edge of the first leg portion includes a first radius portion at the first end;
• a second leg portion having a first end portion extending from the second flange member, a second end portion, a leading edge portion extending between the first and second end portions, and a trailing edge portion extending between the first and second end portions spaced from the leading edge portion, wherein the leading edge portion of the second leg portion includes a second radius portion at the first end portion;
• and
• a wing member arranged between the first and second leg portions at respective ones of the second end and the second end portion, the wing member including a flow conditioning surface having a non-linear profile extending between the second end and the second end portion.

A method of forming a flow mixing lobe comprising:

• forming a first flange member;
• forming a second flange member;
• creating a first leg portion extending from the first flange member, the first leg portion including a leading edge having a first radius portion;
• creating a second leg portion extending from the second flange member, the second leg portion including a leading edge portion having a second radius portion;
• and
• establishing a wing member between the first and second leg portions, the wing member including a flow conditioning surface having a non-linear profile extending between the first and second leg portions.