Compact diffuser, particularly suitable for high-power gas turbines
AssigneeNuovo Pignone S.p.A.
InventorCostantino Vinciguerra
Life of this patent
Estimating the term…
Abstract
A compact diffuser for high-power gas turbines, comprising a first diffusion section of substantially axial path defined by two conical coaxial walls, followed by a double curved diffuser with three walls, of which the intermediate wall is cantilever-supported by a set of aerodynamically profiled ribs disposed horizontally and situated near the exit of said double curved diffuser. The diffuser is connected to the turbine exhaust casing by an envelope internal to said exhaust casing and having its contours smoothly joined to the diffuser.
Claims6
A compact diffuser for high-power gas turbines, comprising a first diffusion section free of ribs and/or intermediate walls, wherein said first diffusion section is of substantially axial path, and is defined by two prevalently conical coaxial walls inclined at an angle to the horizontal axis of the turbines, and a double curved diffuser section with three walls following said first diffusion section, wherein the intermediate curved wall of said double curved diffuser section immediately follows said first diffuser section and is cantilever-supported by a twin set of airfoil shaped ribs, said ribs being linear along their length and uniformly spaced about the circumference of the double curved diffuser section, having their generating lines parallel to the horizontal axis of the turbine and are situated near the end of said double curved diffuser to provide substantially uniform outlet velocity from the diffuser.
Dependencies are inferred from the claim text.