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 memontum 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 combustion gases for reducing exhaust emissions.

대표청구항 ▼

A breach-cooled structure comprising: an imperforate first wall having a first surface; a second wall spaced from said first 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 first

A breach-cooled structure comprising: an imperforate first wall having a first surface; a second wall spaced from said first 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 first wall first surface for channeling a cooling fluid through said inlets into said plenum to form a boundary layer of said cooling fluid along said first wall first surface; said plenum including a plurality of outlets for discharging said cooling fluid therefrom; and said channeling means further being effective for channeling said cooling fluid as jets from said inlets of a downstream one of said inlet rows across said plenum to breach said boundary layer of said cooling fluid to contact said first wall first surface for the breach cooling thereof.