Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1991-05-02
1992-09-08
Bertsch, Richard A.
Power plants
Combustion products used as motive fluid
Combustion products generator
60748, F02C 722
Patent
active
051448041
ABSTRACT:
The small airblast fuel nozzle improves cold ignition of small gas turbine engines of the type having a stagnation air pressure of only 1-11/2 inches of water available from the compressor for cold ignition. The fuel nozzle includes an inner air swirling system comprising a longitudinal cylindrical inner air swirl chamber and multiple air inlet slots spaced circumferentially on the nozzle body to supply air to the chamber. The air inlet slots each include an inner tapered section converging toward and into intersection with the chamber and an outer tapered section converging from the exterior of the nozzle body toward and into intersection with the inner section. The inner section and outer section are canted with respect to one another and in the same direction from one slot to the next so that the inner air slots collectively form a hooked cross type pattern when viewed in plan. The inner air swirl system is effective to provide much enhanced air swirling in the inner chamber with a high efficiency or use of the small available stagnation air pressure available at the nozzle exterior for improved cold ignition.
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Bell Leonard D.
Koblish Theodore R.
Bertsch Richard A.
Fuel Systems Textron Inc.
Thorpe Timothy S.
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