Closed circuit steam cooled bucket

Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

416 97R, F01D 518

Patent

active

055361439

ABSTRACT:
In a gas turbine bucket having a shank portion, a radial tip portion and an airfoil having leading and trailing edges and pressure and suction surfaces, and an internal fluid cooling circuit, an improvement wherein the internal fluid cooling circuit has a serpentine configuration including plural radial outflow passages and plural radial inflow passages. The radial outflow passages, in one example, are shaped to have aspect ratios of about 3.3 to 1 and Buoyancy Numbers of <0.15 or >0.80. A method of determining a configuration for steam cooling passages for a bucket stage in a gas turbine is also provided which includes, in one example, the steps of:

REFERENCES:
patent: 2469678 (1949-05-01), Wyman
patent: 2647368 (1953-08-01), Triebbnigg et al.
patent: 2787121 (1957-04-01), Bouffart
patent: 2920865 (1960-01-01), Lombard
patent: 3051439 (1962-08-01), Hilton
patent: 3275294 (1966-09-01), Allen et al.
patent: 3443790 (1969-05-01), Buckland
patent: 3729930 (1973-05-01), Williams
patent: 3749514 (1973-07-01), Kelch et al.
patent: 3785146 (1974-01-01), Bailey et al.
patent: 3807892 (1974-04-01), Frei et al.
patent: 4073599 (1978-02-01), Allen et al.
patent: 4136516 (1979-01-01), Corsmeier
patent: 4302153 (1981-11-01), Tubbs
patent: 4314442 (1982-02-01), Rice
patent: 4338780 (1982-07-01), Sakamoto et al.
patent: 4384452 (1983-05-01), Rice
patent: 4424668 (1984-01-01), Mukherjee
patent: 4462754 (1984-07-01), Schofield
patent: 4507914 (1985-04-01), Rice
patent: 4545197 (1985-10-01), Rice
patent: 4550562 (1985-11-01), Rice
patent: 4571935 (1986-02-01), Rice
patent: 4807433 (1989-02-01), Maclin et al.
patent: 4835958 (1989-06-01), Rice
patent: 4969324 (1990-11-01), Woodson
patent: 4982564 (1991-01-01), Hines
patent: 5120192 (1992-06-01), Ohtomo et al.
patent: 5160096 (1992-11-01), Perkins et al.
patent: 5177954 (1993-01-01), Paul
patent: 5232343 (1993-08-01), Butts
patent: 5350277 (1994-09-01), Jacala et al.
patent: 5391052 (1995-02-01), Correia et al.
patent: 5403159 (1995-04-01), Green et al.
patent: 5413463 (1995-05-01), Chiu et al.
"Development of High-Temperature Turbine Subsystem to a `Technology Readiness Status` Phase II," Quarterly Report, Oct.-Dec. 1979, Horner, General Electric Company, Feb. 1980, p. 8.
"Closed Circuit Steam Cooling in Gas Turbines", Alderson et al., ASME/IEEE Power Generation Conference, Miami Beach, Florida, Oct. 1987.
"New Advanced Cooling Technology and Material of the 1500.degree. C. Class Gas Turbine", Matsuzaki et al., International Gas Turbine and Aeroengine Congress and Exposition, Cologne, Germany, Jun. 1992.
"Heat Transfer in Rotating Serpentine Passages with Smooth Walls", Wagner et al., Gas Turbine and Aeroengine Congress and Exposition-Jun., 1990.
"Heat Transfer in Rotating Serpentine Passages with Trips Skewed to the Flow", Johnson et al., International Gas Turbine and Aeroengine Contress and Exposition, Cologne, Germany, Jun., 1992.
"Effect of Uneven Wall Temperature on Local Heat Transfer in a rotating Square Channel With Smooth Walls and Radial Outward Flow", Journal of Heat Transfer, Nov. 192, vol. 114, pp. 850-858.
"Prediction of Turbulent Flow and Heat Transfer in a Radially Rotating Square Duct", Prakash et al., Heat Transfer in Gas Turbine Engines, HTD-vol. 188, ASME 1991.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Closed circuit steam cooled bucket does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Closed circuit steam cooled bucket, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Closed circuit steam cooled bucket will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1780688

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.