Power plants – Combustion products used as motive fluid
Patent
1990-03-13
1992-05-26
Bertsch, Richard A.
Power plants
Combustion products used as motive fluid
60 3906, 60 39141, F02G 300
Patent
active
051156342
ABSTRACT:
A simplex air blast fuel injection system and method for the atomization of fuel for ignition to drive a gas turbine includes a simplex nozzle which receives a 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 received fuel from the fuel pump 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 and high volume 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, high volume 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 initiation of ignition during turbine startup. A stream of low pressure, high volume air is also directed to the swirling stream of atomized fuel during turbine operation and that air stream is also preferably swirling air.
REFERENCES:
patent: 3668869 (1972-06-01), De Corso et al.
patent: 3886736 (1975-06-01), Kawaguchi
patent: 4891935 (1990-01-01), McLaurin et al.
Arthur H. Lefebvre, Atomization and Sprays, Hemisphere Publishing Corp., 1989, pp. 124-125, 136-142, 150-152.
Arthur H. Lefebvre, Short Course on Atomization, May 8, 1987, pp. 16-17, 21-25, 31-36, FIGS. 4.22, 4.25, 4.26.
Bobzin Darrell G.
Bretz David H.
Bertsch Richard A.
Delavan Inc.
Reiter Howard S.
Richman Howard R.
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