| 摘要 |
PURPOSE:To improve cooling performance, by so constituting that inflow air between a casing and an external wall is led from an air opening of the external wall to an internal wall and a part of the air is led to a linear from an exhaust hole of an impinging part, in joint cooling of impingement cooling with film cooling. CONSTITUTION:Air flowed in a gap between a casing not illustrated in a sketch and an external wall 15 of a combustor from a compressor is spouted 12 from an air hole 8 for cooling toward an inner wall 16 and is run against the inner wall 16. The air is expanded radially centering around this colliding point and a part of the air is exhausted 18 within a liner from an exhaust hole 17 of the center part of the colliding part. With this, as for a jet flow 11 a flow between colliding parts is improved and thermal transfer rate is improved. The inside of the inner wall 16 is cooled from open ends of a turbine side of the external wall 15 and the inner wall 16 by a filmlike exhaust flow 13 of cooling air which has completed impingement cooling. With this constitution, cooling performance can be improved. |
