Sequential cooling insert for turbine stator vane

摘要

A sequential impingement cooling insert for a turbine stator vane that forms a double impingement for the pressure and suction sides of the vane or a triple impingement. The insert is formed from a sheet metal formed in a zigzag shape that forms a series of alternating impingement cooling channels with return air channels, where pressure side and suction side impingement cooling plates are secured over the zigzag shaped main piece. Another embodiment includes the insert formed from one or two blocks of material in which the impingement channels and return air channels are machined into each block.

主权项

1. An impingement cooling insert for a turbine stator vane of a gas turbine engine, the impingement cooling insert comprising:
a pressure side piece; a suction side piece; the pressure side piece having a plurality of spanwise extending impingement cooling air holes alternating with a plurality of spanwise extending return air holes; the suction side piece having a plurality of chordwise extending aft side impingement cooling air holes alternating with a plurality of chordwise extending aft return air holes and forward impingement cooling air holes; and, the pressure side piece and the suction side piece forming a first impingement cooling on the pressure side of the insert, a second impingement cooling on an aft side of the suction side of the insert, and a third impingement cooling of the forward side of the suction side of the insert connected in series.