Patent ID: 8015817

Claim:
A panel of a transition duct that connected to an inlet of a turbine section for a gas turbine engine, the panel comprising: a middle subpanel having an inner side and an outer side; an inner subpanel having inner and outer sides, and located adjacent to the inner side of the middle subpanel; an outer subpanel having inner and outer sides, and located adjacent to the outer side of the middle subpanel; inner spacer members extending from the inner side of the middle subpanel and attached to the outer side of the inner subpanel to space the inner subpanel out of contact with the middle subpanel and define an inner plenum between the middle subpanel and the inner subpanel; outer spacer members extending from the outer side of the middle subpanel and attached to the inner side of the outer subpanel to space the outer subpanel out of contact with the middle subpanel and define an outer plenum between the middle subpanel and the outer subpanel; a plurality of effusion holes formed through the middle subpanel connecting the outer plenum to the inner plenum; a plurality of outer diffusion holes formed through the outer subpanel for passing a flow of cooling air from a high pressure region surrounding the outer side of the outer subpanel of the transition duct through the outer diffusion holes into the outer plenum; and a plurality of film holes formed through the inner subpanel for passing a flow of cooling air from the inner plenum through the film holes into a hot gas flow adjacent to the inner side of the inner subpanel.