Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1976-11-19
1978-10-10
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
416 97R, F01D 518
Patent
active
041193903
ABSTRACT:
Individual coolant passages in the airfoil portion of a liquid-cooled turbine bucket are provided with means whereby the main flow of liquid coolant moving in each such individual passage during turbine operation under the influence of centrifugal force is split into a pair of flows with each sub-flow moving along a generally helical path. Also, the splitting means is provided with means to interrupt each sub-flow so as to enlarge significantly the internal wall area of such coolant passage with which the liquid coolant makes contact. In the embodiment described the splitting means is a twisted tape member bonded along its edges within a tubular coolant passage and the interrupting means are a series of inwardly-directed slots in the edges of the tape.
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R.I. Hodge et al., "A Review of Blade Cooling Systems", part 2, The Gas Turbine, Feb. 1958, pp. 396-398.
Dakin James T.
Darrow Kenneth A.
Cohen Joseph T.
General Electric Company
MaLossi Leo I.
Powell Jr. Everette A.
Watts Charles T.
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