Gas turbine exhaust diffuser

摘要

The present invention relates to an exhaust diffuser for a gas turbine, the diffuser being designed to be inserted downstream from a last expansion stage constituted by an outlet duct of circular cross-section containing a central bulb. The diffuser includes a flared transition duct having an inlet end of circular cross-section identical to the cross-section of the outlet duct of the last stage, an outlet end of square cross-section, and four fixed fins disposed inside the ducts close to respective corners of the square cross-section for directing the exhaust gases toward the corners of the square cross-section.