Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1989-06-22
1991-02-12
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
416 96A, 415115, B63H 114
Patent
active
049920260
ABSTRACT:
A blade of a gas turbine includes a main body having a dovetail portion and a blade portion extending from the dovetail portion. A cooling air passage for flowing a cooling air is formed in the main body to cool the blade portion. The passage includes a cooling air inlet port open to the dovetail portion and an outlet port open to an extended tip of the blade portion. A first passage portion extends from the inlet port to the portion close to the extended tip along a leading edge of the blade portion. A final passage portion extends from the dovetail portion to the outlet port. The flow sectional area of the final passage portion is gradually decreased from the dovetail portion toward the outlet port. The final passage portion communicates with a number of film cooling holes which are open to the suction side surface of the blade portion.
REFERENCES:
patent: 3628885 (1971-12-01), Sidenstick et al.
patent: 4073599 (1978-02-01), Allen et al.
patent: 4162136 (1979-07-01), Parkes
patent: 4650399 (1987-03-01), Craig et al.
Fukuyama Yoshitaka
Ito Shoko
Iwasaki Hideo
Ohtomo Fumio
Okamoto Yasuo
Kabushiki Kaisha Toshiba
Look Edward K.
Newholm Therese M.
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