Metal duct subjected to steep temperature gradients
AssigneeEuropean Gas Turbines Limited
InventorsLiberto Gandia, Frederic Rouget
Life of this patent
Estimating the term…
Abstract
The present invention relates to a metal duct, the inside of which is subjected to steep temperature gradients, and which includes a sheet metal tube of rectangular crosssection with rounded corners and reinforced with outer stiffeners constituted by members which are disposed in planes perpendicular to the axis of symmetry of the tube and which are connected thereto. The stiffening members are constituted by rectilinear first members welded to the sides of the tube and interconnected at each corner via a respective second member which is secured via its ends to two adjacent first members, the second member being spaced apart from the duct. The duct is designed, in particular, to form a gas turbine exhaust duct.
Claims6
A metal duct subjected to steep temperature gradients comprising:
- a sheet metal tube substantially rectangular in cross-section with four flat sides and four rounded corners;
- and
- outer stiffeners disposed in separate discrete planes substantially perpendicular to a longitudinal axis of said tube, said outer stiffeners comprising four rectilinear first members, each of said first members being welded along a respective one of said four flat sides, and four second members, each of said second members being mounted between adjacent ends of said first members around a respective one of the rounded corners and spaced a predetermined distance from the rounded corners so as not to contact the rounded corners.
A gas turbine exhaust duct comprising:
- a sheet metal tube substantially rectangular in cross-section with four flat sides and four rounded corners;
- and
- outer stiffeners disposed in separate discrete planes substantially perpendicular to a longitudinal axis of said tube, said outer stiffeners comprising four rectilinear first members, each of said first members being welded along a respective one of said four flat sides, and four second members, each of said second members being mounted between adjacent ends of said first members around a respective one of the rounded corners and spaced a predetermined distance from the rounded corners so as not to contact the rounded corners.
Dependencies are inferred from the claim text.