To provide a means for improving cooling efficiency by suppressing an increase of a flow speed of a cross flow at the downstream side, in a blade body employing an impingement cooling method.
A turbine static blade 10 comprises: an outer frame 20 which forms a blade form; an insertion member 22 which is arranged having an internal face 20a of the outer frame 20 and a clearance C in the outer frame, and has an injection hole 223 which injects a cooling gas RG supplied to the insertion member toward the internal face 20a of the outer frame 20; and a discharge port 25 which discharges the cooling gas RG flowing into the clearance C. The clearance C is formed so that a cross section area gradually becomes larger as progressing to the downstream side from the upstream side of a direction in which the cooling gas RG is discharged to the discharge port 25.
ISHIGURO TATSUO
SHODA JUNICHIRO
TAKADA KAZUMASA
TORII SHUNSUKE
FUKUNAGA YUYA
KONISHI SATORU
ISHIKAWA SHINYA
IGARASHI YOSHIAKI
HAYASHI MASATO
TOHOKU ELECTRIC POWER CO
| JP2007132347A | 2007-05-31 | |||
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Masatake Shiga
Tadashi Takahashi
Tetsuo Yamazaki
Yasushi Matsunuma