Power plants – Reaction motor – Condition responsive thrust varying means
Patent
1981-01-21
1983-08-16
Casaregola, L. J.
Power plants
Reaction motor
Condition responsive thrust varying means
60261, F02K 310
Patent
active
043983880
ABSTRACT:
An afterburner on a turbofan or fan-jet engine contains a fuel system having a fuel control delivering fuel to a plurality of injection zones. As the power lever is advanced, for afterburner operation, fuel is delivered sequentially to the afterburner through different zones until it reaches the last zone. The last zone comprises a set of two axially spaced sprayrings located adjacent the outer wall of the afterburner, one spraying being located upstream of the other spraying. The downstream sprayring has a splash plate located radially inwardly from each nozzle to provide a barrier to the fuel spraying inwardly for directing a portion of the spray downstream over the outward radial portion of the afterburner near the afterburner wall. When fuel flow is directed to the last zone by the fuel control the fuel flows directly to the upstream sprayring, while fuel flow to the downstream sprayring is controlled by a valve which is closed at a lower range of bypass ratios and open at a higher range of bypass ratios to direct fuel thereto, for spraying adjacent the outer wall. Additional air is available at these higher bypass ratios adjacent the outer wall to permit burning of the fuel closer to the outer wall without adversely affecting the liner.
REFERENCES:
patent: 3295325 (1967-01-01), Nelson
patent: 3360940 (1968-01-01), Rimmer
patent: 3485045 (1969-12-01), Riecke
patent: 3595024 (1971-07-01), Kohler et al.
patent: 3633362 (1972-01-01), Sotheran et al.
patent: 3698186 (1972-10-01), Beane et al.
patent: 3719042 (1973-03-01), Chamberlain
patent: 3793838 (1974-02-01), Nash
patent: 3826586 (1974-07-01), Richards
Casaregola L. J.
McCarthy Jack N.
United Technologies Corporation
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