PARTIALLY COATED BLADE

摘要

A partially coated blade for a gas turbine engine, including a fillet surface surrounding the airfoil section and connecting it to the platform section. A radially outermost portion of the pressure side and leading edge is covered by a thermal barrier coating. This portion extends radially from a first limit to the blade tip. The first limit is located at a radial distance from the platform of at most 21% of the maximum span. The fillet surface is free or substantially free of the thermal barrier coating. In another embodiment, a second portion of the pressure side and of the leading edge is free or substantially free of the thermal barrier coating, extending radially from the platform section to a second limit located a radial distance from the platform section corresponding to at least 5% of the maximum span. A method of applying a thermal barrier coating is also discussed.

主权项

1. A partially coated blade for a gas turbine engine, the blade comprising:
a platform section; an airfoil section extending radially outwardly from the platform section and defining a tip of the blade, a maximum radial distance between the platform section and the tip defining a maximum span of the blade, the airfoil section including:
opposed leading and trailing edges,a pressure side extending from the platform section to the tip and interconnecting the leading and trailing edges, anda suction side from the platform section to the tip and interconnecting the leading and trailing edges opposite the pressure side; wherein a first portion of the pressure side and of the leading edge is covered by a thermal barrier coating, the first portion extending radially between a first limit and the tip, the first limit located at a radial distance from the platform section of at most 21% of the maximum span; and wherein a second portion of the pressure side and of the leading edge is free or substantially free of the thermal barrier coating, the second portion extending radially between the platform section and a second limit, the second limit located a radial distance from the platform section corresponding to at least 5% of the maximum span.