Exhaust diffuser for a gas turbine

An exhaust diffuser for a gas turbine, the exhaust diffuser comprising:

• an annular duct having an inlet end and an outlet end, the annular duct being delimited by an inner wall and by an outer wall radially surrounding the inner wall;
• a row of first struts arranged at a first axial position in the annular duct, the first struts connecting the inner wall and the outer wall and being distributed over the circumference of the annular duct, each of the first struts having a leading edge facing the inlet end and a trailing edge facing the outlet end, wherein the annular duct has a cross-sectional area which decreases towards the outlet end in a region downstream of the trailing edges of the first struts to a local minimum and then increases again towards the outlet end;
• and
• a row of second struts arranged at a second axial position in the annular duct, the second struts connecting the inner wall and the outer wall and being distributed over the circumference of the annular duct, each of the second struts having a leading edge facing the inlet end and a trailing edge facing the outlet end of the annular duct, the leading edges of the second struts being arranged downstream of the trailing edges of the first struts and downstream of the local minimum of the cross-sectional area, and wherein the leading edges of the second struts are arranged downstream of the local minimum of the cross-sectional area at a distance from said local minimum which is larger by a factor of at least 3 than the distance from the trailing edges of the first struts to said local minimum, and
• wherein the outer wall has a circumference, which decreases in a region downstream of the trailing edges of the first struts to the local minimum and continuously increases in a region downstream of the local minimum to the leading edge of the second struts.