Power plants – Combustion products used as motive fluid – Multiple fluid-operated motors
Patent
1996-12-31
1999-06-15
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Multiple fluid-operated motors
60726, 4151492, F02C 7042
Patent
active
059116790
ABSTRACT:
A cospander for extending the high efficiency range of a turbine engine is described. A cospander, in one aspect, is a turbomachinery device including at least one stage wherein stator vane and rotor blade rows are continuously variable to an extent that each stage can be operated in compression, expansion, or null modes depending on the blade and vane angles at any specific operating point. Such a device placed ahead or within a typical compressor has the effect of reducing, increasing, or maintaining the through flow of the primary working fluid. Such flow variation control can be used to achieve the desired overall turbomachinery thermal efficiency improvements over a wider operating range than is otherwise possible. In one specific embodiment, for example, the cospander includes a variable stator vane and a variable pitch rotor blade in series flow relationship.
REFERENCES:
patent: 2952973 (1960-09-01), Hall et al.
patent: 3449914 (1969-06-01), Brown
patent: 3609967 (1971-10-01), Waldman
patent: 4170874 (1979-10-01), Kyrklund
Farrell William M.
Horner Michael W.
Niskode Padmakar M.
Casaregola Louis J.
General Electric Company
Herkamp Nathan D.
Hess Andrew C.
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