Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1998-07-08
2000-05-02
Verdier, Christopher
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
F01D 518
Patent
active
06056508&
ABSTRACT:
In a cooling system for the trailing edge region of a hollow gas turbine blade, there extends from the blade root (1) to the blade tip (2) a duct (3) through which the flow passes longitudinally and which, in the region of the blade body (4), is delimited by the inner walls of the trailing edge (5), the suction side (6) and the pressure side (7) and by a web (9), the inner walls of the suction side and of the pressure side being provided with a plurality of ribs (8) running at least approximately parallel. The ribs (8) run obliquely from the web (9) in the direction of the trailing edge (5) and are directed radially outward on at least one of the two inner walls. The suction-side ribs and the pressure-side ribs are offset relative to one another over the blade height. The ratio of the height (h) of the ribs (8) to the local height (H) of the duct (4) is constant over the longitudinal extent of the ribs.
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"Augmented Heat Transfer in Triangular Ducts with Full and Partial Ribbed Walls", Zhang, et al., Journal of Thermophysics and Heat Transfer, vol. 8, No. 3, Jul.-Sep. 1994, pp. 574-579.
"Experimental Study of the Effects of Bleed Holes on Heat Transfer and Pressure Drop in Trapezoidal Passages with Tapered Turbulators", et al., May 24-27, 1993 Presentation at Gas Turbine and Aeroengine Congress and Exposition.
Harasgama Prith
Johnson Bruce
Weigand Bernhard
Wu Pey-Shey
ABB Alstom Power (Switzerland) Ltd
Verdier Christopher
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