Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1996-01-02
1997-10-14
Freay, Charles G.
Power plants
Combustion products used as motive fluid
Combustion products generator
60 39463, 60737, 60742, 60746, 60748, 60755, 239405, 2394245, 239543, F02C 100, F02G 300
Patent
active
056759711
ABSTRACT:
An air fuel mixer is disclosed having a mixing duct, a shroud surrounding the upstream end of the mixing duct in which a fuel manifold is provided in flow communication with a fuel supply and control means, a set of inner and outer counter-rotating swirlers adjacent the upstream end of the mixing duct for imparting swirl to an air stream, a hub separating the inner and outer annular swirlers to allow independent rotation of the air stream, and a centerbody located axially along and substantially the full length of the mixing duct. In order to inject one type of fuel into the mixing duct, fuel is supplied to the outer annular swirlers which include hollow vanes with internal cavities, wherein the internal cavities of the outer swirler vanes are in fluid communication with the fuel manifold in the shroud. The outer swirler vanes further include a plurality of fuel passages therethrough in flow communication with the internal cavities. A second fuel can be injected into the mixing duct by means of a plurality of orifices in the centerbody wall which are in flow communication with a fuel supply and control means. In this way, high pressure air from a compressor is injected into the mixing duct through the swirlers to form an intense shear region and fuel is injected into the mixing duct from the outer swirler vane passages and/or the centerbody orifices so that the high pressure air and the fuel is uniformly mixed therein so as to produce minimal formation of pollutants when a fuel/air mixture is exhausted out the downstream end of the mixing duct into the combustor and ignited.
REFERENCES:
patent: 3668869 (1972-06-01), De Corso et al.
patent: 5165241 (1992-11-01), Joshi et al.
patent: 5251447 (1993-10-01), Joshi et al.
patent: 5263325 (1993-11-01), McVey et al.
patent: 5351477 (1994-10-01), Joshi et al.
Patent application Serial No. 08/545,438, filed Oct. 1995 entitled Low Emissions Combustor Premixer, by Anthony J. Dean.
Angel Paul R.
Caldwell James M.
Dean Anthony J.
Heberling Paul V.
Joshi Narendra D.
Freay Charles G.
General Electric Company
Hess Andrew C.
Traynham Wayne O.
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