Power plants – Combustion products used as motive fluid
Patent
1992-01-24
1993-07-06
Bertsch, Richard A.
Power plants
Combustion products used as motive fluid
60740, F02C 726, F02G 300
Patent
active
052243338
ABSTRACT:
A simplex air blast fuel injection system for the atomization of fuel for ignition to drive a gas turbine includes a simplex nozzle which receives fuel from a fuel pump powered by the turbine over a range of pressures between maximum and minimum pressures during the operation of the turbine, and also receives fuel at a substantially lower pressure than the minimum fuel pressure when the turbine is cranked during startup. The fuel is discharged from the nozzle orifice as a swirling stream of atomized fuel during turbine operation, and as a film which is insufficiently atomized to initiate ignition during the turbine startup. An air compressor is also powered by the turbine to supply air at a low pressure to the fuel issuing from the nozzle orifice during both turbine operation and startup. An air director shroud imparts a swirling motion to the low pressure air and directs the swirling air to adjacent the fuel film as it issues from the nozzle orifice during startup to produce a pressure differential between opposite sides of the film to explode and atomize the fuel film sufficiently to permit ignition during turbine startup. A stream of low pressure air is also directed to the swirling stream of atomized fuel during turbine operation and that air stream is also preferably swirling.
REFERENCES:
patent: 3668869 (1972-06-01), De Corso et al.
patent: 3853273 (1974-12-01), Bahr et al.
patent: 3886736 (1975-07-01), Kawaguchi
patent: 4891935 (1990-01-01), McLaurin et al.
patent: 4938019 (1990-07-01), Angell et al.
Bobzin Darrell G.
Bretz David H.
Bertsch Richard A.
Delavan Inc
Reiter Howard S.
Richman Howard R.
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