发明授权
US07690885B2 Methods and system for shielding cooling air to facilitate cooling integral turbine nozzle and shroud assemblies 有权
用于屏蔽冷却空气的方法和系统,以便于冷却整体的涡轮喷嘴和护罩组件

Methods and system for shielding cooling air to facilitate cooling integral turbine nozzle and shroud assemblies
摘要:
A method for cooling a shroud segment of a gas turbine engine includes providing a turbine shroud assembly including a shroud segment having a leading edge defining a forward face. A turbine nozzle is coupled to the turbine shroud assembly such that a gap is defined between an aft face of an outer band of the turbine nozzle and the forward face, wherein a lip formed on the aft face is positioned radially inwardly with respect to the gap and extends substantially axially downstream from the gap. Cooling air is directed into the gap. Cooling air exiting the gap impinges against the lip. Post impingement cooling air is directed at the forward face to facilitate forming a film cooling layer on the shroud segment. The film cooling layer is shielded from combustion gases flowing through the gas turbine engine.
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