Patent ID: 11905847
Assignee: RTX CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. An airfoil comprising:
an airfoil wall having a span between first and second radial ends and defining leading and trailing edges, pressure and suction sides each joining the leading and trailing edges, and an internal cavity,
the internal cavity being divided into at least first and second sub-cavities extending over the span,
the first sub-cavity defining a venturi tube, the venturi tube having a convergent-divergent geometry such that a cross-sectional area of the venturi tube decreases from the first radial end to a location along the span at which the cross-sectional area is at a minimum and the cross-sectional area increases from the location of the minimum to the second radial end, and
airfoil wall being formed of a ceramic matrix composite having ceramic fiber plies that locally build-up a thickness of at least one of the pressure or suction sides of the airfoil wall at the location of the minimum such that the venturi tube tapers in a tangential direction along the span from the first radial end to the location of the minimum and expands in the tangential direction along the span from the location of the minimum to the second radial end.