Siemens Aktiengesellschaft

Siemens Power Generation, Inc.

Guenter Lins

Thomas Hammer

David Walter Branston

David-Walter Branston

Dennis Pavlik

Jobst Verieger

A method of operating a combustor (), to provide intimately mixed hot combusted gas () for a gas turbine (), includes feeding gaseous oxidant () and gaseous fuel () into the combustor () near a combustion flame () which has a tip end () and a root end (), where corona discharge occurs through adjustment of an electric field (), and where the corona discharge causes ionized particles () to form and also causes intimate turbulent mixing of the gases.

Electric flame control using corona discharge enhancement

Powder aerosols are introduced into a gas stream in metered form and without any aggregates. To this end, according to the invention, a powder is drawn, for example by mechanical device, from a reservoir area and is converted into a powder aerosol which is introduced within a flowing gas stream into a container to which ultrasound is applied. The ultrasound breaks down powder lumps and aggregates, and the aerosol can be fed in a uniform, fine powder distribution within the gas stream to a plasma burner. Apparatus for carrying out this invention includes a feed tube (,) connected to a mechanical powder feed device (,), so that an aerosol containing the powder enters a vessel (,) containing the ultrasound horn (,). The method and the associated apparatus are used for the coating of components, preferably for applying a protective coating to a turbine blade.

Method and device for producing a powder aerosol and use thereof

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Erlangen, Germany

Guenter Lins