Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1985-12-23
1988-02-23
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...
415115, F01D 518
Patent
active
047267356
ABSTRACT:
The wall of a hollow airfoil for a gas turbine engine includes a film cooling slot therein elongated in the longitudinal direction and having a base within the wall and an outlet at the external surface of the airfoil. A plurality of metering passages extend from inlets at the internal surface of the wall and intersect the slot near its base. The metering passages are angled to direct a metered flow of coolant fluid at a sharp angle against a surface of the slot to cause turbulence and diffusion of the coolant fluid within the slot in order that the coolant fluid fill the entire slot. The coolant fluid thereupon exits the slot as a thin film over the surface of the airfoil downstream of the slot outlet along the full length of the slot.
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Flight and Aircraft Engineer, No. 2460, vol. 69, 3-16-56, pp. 292-295.
Advances in Heat Transfer, by Richard J. Goldstein, vol. 7, Academic Press (N.Y. 1971) The Monograph Film Cooling, pp. 321-379.
NASA Technical Paper 1546 Influence of Coolant Tube Curvature on Film Cooling Effectiveness as Detected by Infrared Imagery, by S. Stephen Papell et al, 1979.
Field Robert E.
Phillips James S.
Powell Jr. Everette A.
Revis Stephen E.
United Technologies Corporation
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