초록 ▼

The present invention comprises a method and apparatus for improving cooling of a wall in a gas turbine engine. The method and apparatus provide breach cooling of an imperforate wall, such as a combustor liner, for improving the cooling thereof. The breach cooling includes structure for channeling a

The present invention comprises a method and apparatus for improving cooling of a wall in a gas turbine engine. The method and apparatus provide breach cooling of an imperforate wall, such as a combustor liner, for improving the cooling thereof. The breach cooling includes structure for channeling a cooling fluid as a jet toward an outer surface of the imperforate wall, with the jet having sufficient momentum to breach a boundary layer of the cooling fluid which forms over the wall outer surface to allow the jet to contact the wall outer surface for more effective cooling thereof. In an exemplary embodiment of the invention, the breach-cooled wall is an upstream portion of the gas turbine engine combustor, and the inner surface of the combustor liner facing the combustion gases is characterized by not having a film-cooling boundary layer of air to reduce quenching of the combination gases for reducing exhaust emissions.

대표청구항 ▼

A method of breach cooling an imperforate wall having a first surface over which flows a boundary layer of cooling fluid having momentum and thickness and further including: a second wall spaced from said imperforate wall and joined thereto to define an enclosed plenum; channeling means including sa

A method of breach cooling an imperforate wall having a first surface over which flows a boundary layer of cooling fluid having momentum and thickness and further including: a second wall spaced from said imperforate wall and joined thereto to define an enclosed plenum; channeling means including said second wall having a plurality of longitudinally spaced rows of inlets facing said imperforate wall first surface for channeling a cooling fluid through said inlets into said plenum to form said boundary layer of said cooling fluid along said imperforate wall first surface; and said plenum including a plurality of outlets for discharging said cooling fluid therefrom, said breach cooling method comprising: channeling said cooling fluid as jets from said inlets of a downstream one of said inlet rows across said plenum toward said first surface of said imperforate wall, said jets having sufficient momentum predeterminedly selected relative to said momentum and thickness of said boundary layer to breach said boundary layer of said cooing fluid disposed over said imperforate wall first surface to contact said imperforate wall first surface for the breach-cooling thereof.