Turbine airfoil assembly

摘要

A turbine airfoil assembly has an airfoil with an inner wall, an outer wall, a leading edge and a trailing edge. The airfoil has one or more chambers extending in a substantially chordwise direction of the airfoil. An insert has a plurality of impingement holes, and the insert is configured to be inserted within one of the chambers. The insert is configured to cool the airfoil via the plurality of impingement holes. A chambering element is attached only to the insert, the chambering element is configured to provide an increased cooling gas pressure inside a boundary area defined by the chambering element relative to an area outside the boundary area. A gap exists between the inner wall of the airfoil and the chambering element, and the gap allows cooling gas to exit the boundary area and enter the area outside the boundary area.

主权项

1. A turbine airfoil assembly comprising:
an airfoil having an inner wall, an outer wall, a leading edge and a trailing edge, the airfoil having one or more chambers extending in a substantially chordwise direction of the airfoil; an insert having a plurality of impingement holes, the insert configured to be inserted within one of the chambers, wherein the insert is configured to cool the airfoil via the plurality of impingement holes; wherein a chambering element is attached only to the insert, the chambering element is configured to provide an increased cooling gas pressure inside a boundary area defined by the chambering element relative to an area outside the boundary area, and wherein a gap exists between the inner wall of the airfoil and the chambering element, the gap allowing a cooling gas to exit the boundary area and enter the area outside the boundary area.