To provide a method and a device for particularly forming a uniform flow passage surface between turbine buckets, a turbine and an engine incorporated with such a bucket, in the turbine bucket.
This bucket 100 has a tab tail 108, an airfoil part 110 having a tip shroud 212 including a trailing edge and a leading edge, and a root 112 extending between the tab tail and the airfoil part. The tip shroud is inclined at least at one of the trailing edge or the leading edge before being placed under an operation condition. The inclined tip shroud 212 can have the tip shroud inclined so as to set a suitable engaging state between the adjacent shrouds under the operation condition. A tip 116 can be inclined by a quantity set so as to reduce the possibility of forming a high temperature flow passage step height and a gap by comparing with an uninclined tip.
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Hirokazu Ogura
Toshihisa Kurokawa
Arakawa Satoshi