COOLING PASSAGES FOR INNER CASING OF TURBINE EXHAUST

摘要

PROBLEM TO BE SOLVED: To provide uniform cooling of struts on an inner casing of a gas turbine in an exhaust section.SOLUTION: An inner casing assembly for a turbine includes: an annular inner casing including cooling passages, each passage extending through a wall from a source of cooling fluid to an outer surface of the wall, and struts extending outward from the outer surface of the inner casing. The cooling passages are arranged on the inner casing such that a pair of the cooling passages is on opposite sides of each of the struts and such that the cooling passages in each pair are equidistant to the corresponding strut.