Abstract:
According to the invention, in order to assemble two parts (154, 162) made of materials having different thermal expansion coefficients at their edge portions (154a, 162a) and engaged with each other, the method comprises forming along the thinned edge of one of the parts tabs (170) separated by slots (172) and obtained by cutting or machining the material of the part, and assembling the parts by attaching them (174) to the tabs. The edge portions are mutually engaged in order to be brought into mutual substantially tight contact at the high temperatures achieved during operation. The invention can particularly be used for assembling parts respectively made of a metal and a ceramic-matrix composite material, in particular in an aircraft gas turbine such as the upstream and downstream secondary nozzles.
Abstract:
The invention relates to an exhaust system (100) for directing the flow from a gas turbine, that comprises a flow directing nozzle and an exhaust casing (110) for connecting the duct nozzle to the outlet of the gas turbine. The duct nozzle includes a primary duct (120) attached to the exhaust casing (110) and a secondary nozzle (130) arranged about the primary nozzle. The exhaust system further includes a means for directly attaching the secondary nozzle (130) to the exhaust casing (110), the secondary nozzle being held by the exhaust casing independently from the primary nozzle (120).
Abstract:
The invention relates to an afterbody assembly for an aeronautical engine including an annular part (60), made of metal material and rigidly connected to the aeronautical engine, and to an afterbody part (20), made of ceramic matrix composite material, the afterbody part (20) being mounted onto the annular part (60) by resiliently flexible mounting lugs (70) and having a first end (71) attached onto the annular part (60) and a second end (72) attached onto the upstream portion of the afterbody part (20). Each mounting lug (70) includes an axial abutment element (720) radially extending from the second end (72) of the lug and at least partially facing the first end (71). The mounting lug (70) also includes a radial abutment element (721) on the second end (72) of the lug, the radial abutment element (721) being at least partially above the first end (71).
Abstract:
The invention relates to an afterbody assembly for an aeronautical engine including an annular part (60), made of metal material and rigidly connected to the aeronautical engine, and to an afterbody part (20), made of ceramic matrix composite material, the afterbody part (20) being mounted onto the annular part (60) by resiliently flexible mounting lugs (70) and having a first end (71) attached onto the annular part (60) and a second end (72) attached onto the upstream portion of the afterbody part (20). Each mounting lug (70) includes an axial abutment element (720) radially extending from the second end (72) of the lug and at least partially facing the first end (71). The mounting lug (70) also includes a radial abutment element (721) on the second end (72) of the lug, the radial abutment element (721) being at least partially above the first end (71).