Coupling method and structure for a propulsion system hot section

A propulsion system comprising a compressor section, a combustion section, a turbine section, and an afterburning exhaust section in serial arrangement and generally surrounded by an outer casing extended along a longitudinal distance of the propulsion system, wherein the propulsion system further comprises:

• a flameholder assembly disposed in the afterburning exhaust section, the flameholder assembly comprising:
• a housing defining a groove including a retaining rod;
• a structural member defining a first end and a second end, wherein the first end defines a first coupling member coupled to the retaining rod of the housing, and wherein the second end defines a second coupling member coupled to the outer casing;
• and
• a retaining plate coupled to the housing, wherein the structural member is retained within the groove of the housing by the retaining rod of the housing and the retaining plate.

A gas turbine engine comprising a hot section defining a combustion section, a turbine section, and an afterburning exhaust section, the gas turbine engine comprising:

• an outer casing extended generally along a longitudinal direction surrounding the hot section;
• an inner casing extended generally along the longitudinal direction and radially within the outer casing;
• a coupling assembly comprising:
• a housing defining a groove and a retaining rod;
• a structural member defining a first end and a second end, wherein the first end is coupled to the retaining rod, and wherein the second end is coupled to the outer casing;
• a retaining plate coupled to the housing and retaining the structural member to the retaining rod within the groove of the housing;
• a coupling member attached to an annular flameholder casing;
• and
• a spacer disposed between the coupling member and the housing, wherein a mechanical fastener couples together the coupling member, the spacer, the housing, and the retaining plate.