Abstract: An impingement plate for a turbine vane with an integrated cooling flow metering device is disclosed. The impingement plate—which covers the outer end of the vane and allows some cooling air to pass through to the vane's top surface—is re-designed to incorporate an orifice plate for metering the amount of cooling air flow which enters a cooling passage in the vane. The multi-hole orifice pattern in the metering device is designed to optimize the downstream airflow pattern, thus improving heat transfer from the vane to the cooling air. The reduced cooling air flow through the vane results in increased turbine engine efficiency, and the re-designed impingement plate can be used with the existing vane design.

Abstract: An impingement plate for a turbine vane with an integrated cooling flow metering device is disclosed. The impingement plate—which covers the outer end of the vane and allows some cooling air to pass through to the vane's top surface—is re-designed to incorporate an orifice plate for metering the amount of cooling air flow which enters a cooling passage in the vane. The multi-hole orifice pattern in the metering device is designed to optimize the downstream airflow pattern, thus improving heat transfer from the vane to the cooling air. The reduced cooling air flow through the vane results in increased turbine engine efficiency, and the re-designed impingement plate can be used with the existing vane design.

Abstract: An integrated thermal barrier coating and cooling flow metering plate for a turbine vane are disclosed. On an existing vane design, the thickness of the thermal barrier coating is increased in order to provide more thermal protection around the vane material itself. The increased insulation around the vane allows the volume of cooling air flow to be reduced, while still maintaining the vane temperature within specification. The reduced cooling air flow is obtained by adding a flow metering plate at the inlet of a vane trailing edge cooling circuit, thereby increasing turbine efficiency via reduced cooling air flow requirements, while allowing an existing vane casting design to be used.