| 摘要 |
A first stage gas nozzle for directing a combustion gas stream onto the rotatable blades of a gas turbine contains a plurality of spaced air-foil shaped vanes, each vane containing a steam nozzle to direct steam as a thermal barrier over the exterior surfaces of the vane. A steam nozzle in the trailing edge of each vane directs heated coolant steam from the interior of the vane to the gas streams. Disruption of the laminar steam film in the trailing edge steam nozzle such as by the provocation of a shock wave or by diffusion separation exposes the bare surfaces of the trailing edge steam nozzle to the coolant steam thereby improving heat transfer at the extreme trailing edge of the vane.
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