Patent attributes
A cooling scheme for a dome comprises an effusion array drilled directly through a single walled dome. In one embodiment, the layout of the holes comprises two regions, a region close to the fuel injector where the holes follow a tangential path around the injector, and a second region where the direction of the holes is radially outward from the injector axis. A film of cooling air may be applied on the interior side of the combustor dome via an air swirler, which projects air radially outward from the injector axis. The first series of cooling holes supplement this air supply so that cooling efficacy is extended along the dome surface and is directed in a counter-rotating manner with respect to the main air swirler. The second series of dome cooling holes infuse further cooling flux that reduces the temperature in the corner regions between fuel injectors.
