Turbine blade cooling

Details Turbine blade cooling Turbine blade cooling

1997-05-21

1999-07-20

Lopez, F. Daniel

Rotary kinetic fluid motors or pumps

With passage in blade, vane, shaft or rotary distributor...

416 96R, F01D 518

Patent

active

059248432

ABSTRACT:
A turbine rotor blade comprises a shank portion, a tip portion and an airfoil. The airfoil has a pressure side wall and a suction side wall that are interconnected by a plurality of partition sidewalls, defining an internal cooling passageway within the airfoil. The internal cooling passageway includes at least one radial outflow passageway to direct a cooling medium flow from the shank portion towards the tip portion and at least one radial inflow passageway to direct a cooling medium flow from the tip portion towards the shank portion. A number of mixing ribs are disposed on the partition sidewalls within the radial outflow passageways so as to enhance the thermal mixing of the cooling medium flow, thereby producing improved heat transfer over a broad range of the Buoyancy number.

REFERENCES:
patent: 4514144 (1985-04-01), Lee
patent: 5340274 (1994-08-01), Cunha
patent: 5395212 (1995-03-01), Anzai et al.
patent: 5413463 (1995-05-01), Chiu et al.
patent: 5472316 (1995-12-01), Taslim et al.
patent: 5536143 (1996-07-01), Jacala et al.
patent: 5695322 (1997-12-01), Jacobson et al.
patent: 5738493 (1998-04-01), Lee et al.
Johnson et al., American Society of Mechanical Engineers, 92-GT-191, "Heat Transfer in Rotating Serpentine Passages with Trips Skewed to the Flow", (1992), pp. 1-11.
Wagner et al., American Society of Mechanical Engineers, 90-GT-331, "Heat Transfer in Rotating Serpentine Passages with Smooth Walls", (1990), pp. 1-13.

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