Patent ID: 8756911

Claim:
An industrial gas turbine engine exhaust cylinder comprising: an inlet end connected to receive a turbine exhaust gas flow and an outlet end; an outer diameter cylinder and an inner diameter cylinder forming a flow path through the exhaust cylinder for the turbine exhaust gas; a fairing having an airfoil shape extending from the outer diameter cylinder to the inner diameter cylinder; a strut extending from an outer casing to an inner casing and passing through the fairing with a space formed between the fairing and the strut for cooling air to flow; a heat shield secured over the outer diameter cylinder and positioned between two adjacent struts; the heat shield having an internal cooling air channel with an inlet opening for cooling air and a plurality of impingement holes directed to discharge impingement cooling air to an outer surface of the outer diameter cylinder; and, a blower connected to the inlet opening of the heat shield to supply cooling air to the impingement holes.