COMBUSTOR FOR A GAS TURBINE ENGINE

摘要

In an embodiment of the invention, a dual-wall casing for a combustor comprises an outer wall and an inner wall defining a channel therebetween. The walls are fastened together by a bolt which extends from the inner wall and across the channel. In use, the inner wall is exposed to combustion products. Cooling is provided by a primary inlet hole extending through the outer wall and arranged upstream (with respect to the direction of flow of coolant in the channel) of the bolt and an array of effusion holes extending through the inner wall and positioned with their inlet in line of sight of the primary inlet hole. The primary inlet hole is sized with respect to the array of effusion holes such that it has a flow area which causes locally negligible flow restriction.

主权项

1. A dual-wall component configured for use in a high temperature environment, the component comprising;
an outer wall and an inner wall defining a channel therebetween, the inner wall, in use, exposed to the high temperature, a primary inlet hole extending through the outer wall, an array of effusion holes extending through the inner wall and positioned with their entire inlet in direct line of sight of the primary inlet hole, the primary inlet hole sized with respect to the array of effusion holes such that it has a flow area which causes locally negligible flow restriction.