Aerodynamic flame holder
AssigneeMotoren- und Turbinen-Union Munchen GmbH
InventorWolfgang Bergt
Life of this patent
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Abstract
Flame holder apparatus and method of operating same for a burner in a high velocity gas stream of an air-breathing jet engine. A flame holder body of aerodynamically streamlined external configuration is provided which extends spanwise across a high velocity gas stream of the engine. Fuel and air for the burner is supplied by way of a mixing chamber arranged internally of the flame holder body in such a manner that a homogeneous mixture, including all of the fuel necessary for combustion, is provided by way of the flame holder body so that separate fuel injection nozzles become unnecessary. Various preferred embodiments of the invention include arrangements of the flame holder apparatus in the bypass air stream and downstream of the combustion chamber.
Claims18
Flame holder apparatus for a burner in a high velocity gas stream of an air-breathing jet engine;
- said apparatus comprising:
- flame holder body means extendible spanwise across a high velocity gas stream of an engine, said flame holder body means having an aerodynamically streamlined external configuration with respect to the flow of said gas stream therearound,
- mixing chamber means formed inside said flame holder body means,
- fuel supply means opening into said mixing chamber means for supplying atomized fuel thereto,
- air supply means opening into said mixing chamber means for supplying air thereto,
- said mixing chamber means including means for premixing the atomized fuel and air supplied thereto to form a premixed fuel-air mixture inside said mixing chamber means.
- and outlet means leading from said mixing chamber to the surface of said flame holder body means for supplying said fuel-air mixture under pressure to the gas stream flowing over said flame holder body means to support combustion in said gas stream,
- wherein said fuel supply means includes means for supplying all fuel for supporting combustion in said burner by way of said mixing chamber such that all fuel is supplied through said, outlet means in a premixed condition ready for ignition,
- wherein said mixing chamber means is formed as a hollow space having a longitudinal axis extending in the spanwise direction at right angles to the flow of said gas stream over the entire span of the flame holder body means,
- wherein inlet duct means are provided at at least one spanwise end of said flame holder body means, and
- wherein said fuel supply means and said air supply means both open into each of said inlet duct means in the direction of the longitudinal axis of said hollow space such that the fuel is atomized and partially admixed with the air from said air supply means within said inlet duct means at a position upstream of the mixing chamber means.
Dependencies are inferred from the claim text.