Patent ID: 9631624
Date: 2017-04-25
CPC Classifications: F01D,F04D,F05D,Y02T

Claim:
1. An exhaust diffuser for a torque-generating turbine, the exhaust diffuser comprising: an inner member having an outer surface and an outer member having an inner surface, the inner member and the outer member forming an annular channel, a first supporting strut connecting the inner member and the outer member, the first supporting strut extending essentially radially from the inner surface to the outer surface, a second supporting strut, wherein the first supporting strut and the second supporting strut form a mirror twin-strut with an in flow-direction narrowing channel therein between; the first supporting strut and the second supporting strut comprising a middle section having a first airfoil, an outer section having a second airfoil and an inner section having a third airfoil, the second airfoil differing from the first airfoil in shape to be able to handle a higher range of angle of attack with respect to the first airfoil, and wherein: the first airfoil comprises a smaller leading edge radius than the second airfoil and the third airfoil; or the first airfoil comprises a smaller camber than the second airfoil and the third airfoil; or the second airfoil comprises a higher angle of incidence than the first airfoil and the third airfoil comprises a lower angle of incidence than the first airfoil.