Variable cycle engine with enhanced stability

Details Variable cycle engine with enhanced stability Variable cycle engine with enhanced stability

1995-12-06

1997-04-29

Freay, Charles G.

Power plants

Reaction motor

Interrelated reaction motors

60262, 415 20, 415144, 415160, F02K 302

Patent

active

056238231

ABSTRACT:
A variable cycle gas turbine engine (10) includes a core unit (30) having a guide vane array (36), and a hybrid stage (38) with a rotor blade array (40) and a stator vane array (42). The engine is operable in at least two modes which channel different quantities of working medium air to the core unit, and each mode corresponds to a distinct thermodynamic cycle. The vanes (54) of the hybrid stage stator vane array are bivariable so that the leading segment (140) and trailing segment (146) of each vane are separately adjustable over a range of pitch angles. The bivariable character of the vanes ensures aerodynamic stability of the engine in each of its modes of operation.

REFERENCES:
patent: 3887297 (1975-06-01), Welchek
patent: 4010608 (1977-03-01), Simmons
patent: 4741665 (1988-05-01), Hanser
patent: 4791783 (1988-12-01), Neitzel
patent: 5311736 (1994-05-01), Lardellier
patent: 5404713 (1995-04-01), Johnson

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