Variable stator and shroud assembly

Details Variable stator and shroud assembly Variable stator and shroud assembly

1986-09-15

1988-09-06

Schwartz, Larry I.

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Upstream of runner

415162, F01D 1714

Patent

active

047689226

ABSTRACT:
A variable stator assembly is provided for a gas turbine engine. The assembly comprises at least one winglet disposed on the radially inner end of each variable stator blade and/or on the radially outer end of each variable stator blade. The assembly further comprises at least one shroud disposed substantially adjacent and parallel to the associated winglet and within the flow path relative to the winglet. In a preferred embodiment, the assembly comprises both inner and outer winglets and inner and outer shrouds, with the shrouds being disposed intermediate the pair of winglets. The downstream edge of the shroud is configured to be substantially adjacent to the upstream edge of each variable stator blade through the full range of movement of each variable stator blade. Additionally, the shroud extends into the flow path between adjacent variable stator blades.

REFERENCES:
patent: 3736070 (1973-05-01), Moskowitz et al.
"Research on a High Work Axial Gas Generator Turbine", by Patel, Society of Automative Engineers, 1980.
"Cold-Air Performance of A 12.776 Centimeter Tip Diameter Axial Flow Cooled Turbine" by Haas and Kofskey, NASA TP 1032, Sep. 1977.

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