Patent attributes
With regard to gas turbine engines it will be appreciated that blades are typically cooled in order to ensure that the materials from which the blades are formed remain within acceptable operational parameters. Coolant is judiciously used in order to maintain engine operational efficiency. Unfortunately with regard to rotor blades horseshoe vortices tend to increase heating towards a pressure side of a blade resulting in localized overheating. Such localized overheating may result in premature failure of the blade component. Traditionally coolant flows have been presented over a forward projection of a blade platform. In such circumstances coolant flow will not be used as efficiently as possible with regard to protecting a pressure side of a platform in a blade assembly and arrangement. By provision of a deflector element on the forward blade platform coolant flow can be proportioned either side of a leading edge of the blade. In such circumstances generally asymmetric coolant flow is provided normally biased towards the pressure side in order to enhance cooling efficiency. A suction side in an adjacent blade assembly is cooled by spent coolant and hot gas flow from the pressure side of a neighboring blade upstream in the assembly.
