Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1993-04-05
1994-07-12
Bertsch, Richard A.
Power plants
Combustion products used as motive fluid
Combustion products generator
60752, F23R 316
Patent
active
053277279
ABSTRACT:
A gas turbine engine hot section combustor liner is provided a non-film cooled portion of a heat transfer wall having a hot surface and a plurality of longitudinally extending micro-grooves disposed in the portion of the wall along the hot surface in a direction parallel to the direction of the hot gas flow. The depth of the micro-grooves is very small and on the order of magnitude of a predetermined laminar sublayer of a turbulent boundary layer. The micro-grooves are sized so as to inhibit heat transfer from the hot gas flow to the hot surface of the wall while reducing NOx emissions of the combustor relative to an otherwise similar combustor having a liner wall portion including film cooling apertures. In one embodiment the micro-grooves are about 0.001 inches deep and have a preferred depth range of from about 0.001 inches to 0.005 inches and which are square, rectangular, or triangular in cross-section and the micro-grooves are spaced about one width apart.
REFERENCES:
patent: 2477583 (1949-08-01), DeZubay et al.
patent: 2617255 (1952-11-01), Niehus
patent: 2785878 (1957-03-01), Conrad
patent: 3398527 (1968-08-01), Taylor et al.
patent: 3515499 (1970-06-01), Beer et al.
patent: 3542486 (1970-11-01), Kercher
patent: 3584972 (1971-06-01), Bratkovich
patent: 3702058 (1972-11-01), DeCorso et al.
patent: 3706203 (1972-12-01), Goldberg et al.
patent: 3865508 (1975-02-01), Nagler
patent: 4280792 (1981-06-01), Hartel et al.
patent: 4446693 (1984-05-01), Pidcock et al.
patent: 4543781 (1985-10-01), Rice
patent: 4650138 (1987-03-01), Grose
patent: 4903480 (1990-02-01), Lee et al.
patent: 4930729 (1990-06-01), Savill
patent: 5117626 (1992-06-01), North et al.
"Drag Measurements on Marine Vehicles With A Riblet Surface Coating", M. C. Gillcrist and L. W. Reidy, Naval Ocean System; Center, San Diego, CA AIAA/ASME/SAE/ASEE, 25th Joint Propulsion Conference, Jul. 10-12, 1989.
"Riblet Drag Reduction At Flight Conditions", M. J. Walsh and W. L. Sellers, III, and C. B. McGinley, NASA Langley Research Center, Hampton, VA, AIAA 6th Applied Aerodynamics Conference, Jun. 6-8, 1988.
"Principles of Heat Transfer", Third Edition, by Frank Keith, University of Colorado, Intext Educational Publishers, New York, and London, 310-315, (1973).
Bertsch Richard A.
General Electric Company
Herkamp Nathan D.
Squillaro Jerome C.
Thorpe Timothy S.
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