Title:
GAS TURBINE BLADE WITH COOLING PASSAGE AND COOLING PASSAGE MACHINING METHOD THEREOF
Document Type and Number:
Japanese Patent JPH03182602
Kind Code:
A
Abstract:
PURPOSE:To improve cooling effect with small cooling medium flow by forming cooling passages, with one or plural lines of spiral irregular parts provided at the inner walls thereof, inside a blade. CONSTITUTION:Plural cooling passages as the passages of a cooling medium 10 are provided from a platform 3 to a shroud 2 inside a blade part 1, and a line of female screw 11 is machined at the inner wall of the cooling passage. The cooling medium 10 thereby flows in the right-angled direction (17) to the protruding part 15 and recessed part 13 of the female screw 11, so that a vortex is generated, a temperature boundary layer is separated and becomes thin, and the heat flow speed is increased so as to increase a heat transmission rate. The cooling effect is thereby accelerated to improve cooling efficiency.
Inventors:
KIRIKAMI SEIICHI
SATO ISAO
SHIMIZU NOBUO
ARAI OSAMU
IIZUKA NOBUYUKI
HIROSE FUMIYUKI
TORITANI HAJIME
SATO ISAO
SHIMIZU NOBUO
ARAI OSAMU
IIZUKA NOBUYUKI
HIROSE FUMIYUKI
TORITANI HAJIME
Application Number:
JP32013289A
Publication Date:
August 08, 1991
Filing Date:
December 08, 1989
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F01D5/18; (IPC1-7): F01D5/18
Domestic Patent References:
| JP59137302B |
Attorney, Agent or Firm:
Honda Kodaira (1 person outside)
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