Power plants – Combustion products used as motive fluid – Combustion products generator
Patent
1997-01-02
1998-10-06
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Combustion products generator
60 39463, 60748, F23R 314, F23R 336
Patent
active
058160493
ABSTRACT:
An apparatus for premixing fuel and air prior to combustion in a gas turbine engine is disclosed as including a linear mixing duct having a circular cross-section defined by a wall. A gas fuel manifold is positioned adjacent the upstream end of the mixing duct and is in flow communication with a gas fuel supply and control means. An outer annular swirler is oriented radially to the mixing duct and positioned adjacent the upstream end of the mixing duct to impart swirl to an air stream entering the outer annular swirler. The outer annular swirler includes hollow vanes with internal cavities which are in flow communication with the gas manifold, the outer swirler vanes also having a plurality of gas fuel passages therethrough in flow communication with the internal cavities to inject gas fuel into the radially-oriented air stream. An inner annular swirler is oriented axially with the mixing duct and positioned adjacent the upstream end of the mixing duct to impart swirl to an air stream entering the inner annular swirler. A holder is provided for connecting the inner and outer annular swirlers in radially spaced relation so that a passage is formed upstream of the mixing duct to direct the radially-oriented air stream swirled by the outer annular swirler into the mixing duct. The holder includes an internal cavity therein with a plurality of passages in flow communication therewith which terminate as openings along an outer radial surface of the holder. A liquid fuel manifold is positioned within the holder internal cavity and is in flow communication with a liquid fuel supply and control means. The liquid fuel manifold is also in flow communication with a fuel tube positioned in each of the holder passages to inject liquid fuel into the radially-oriented air stream directed into the mixing duct.
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Casaregola Louis J.
General Electric Company
Hess Andrew C.
Scanlon Patrick R.
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