Patents by Inventor Stefan Leser

Stefan Leser has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8066424
    Abstract: The invention relates to a mixing device which is arranged in a flow channel and a mixing method for mixing a fluid flowing through the flow channel in a main direction of flow. The mixing device has a plurality of mixer disks which generate leading edge eddies in a fluid flowing through the flow channel in a main direction of flow. The mixer disks are arranged in mixer disk rows in row axes running essentially across the main direction of flow. The mixer disk rows are arranged side by side in the main direction of flow in a common flow channel section where the mixer disks of neighboring mixer disk rows are alternately angled in a positive angle of attack and in a negative angle of attack with respect to the main direction of flow. According to this process, the fluid flowing through the flow channel is mixed thoroughly by a leading edge eddy system, whereby in the mixing method presented here at least two contra-rotating leading edge eddy systems are generated in a common flow channel section.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: November 29, 2011
    Assignee: Balcke-Durr GmbH
    Inventors: Hans Ruscheweyh, Stefan Leser, Michael Kaatz
  • Patent number: 7784262
    Abstract: The present invention relates to an exhaust gas guide of a gas turbine, which is situated between the gas turbine and a downstream waste heat boiler or a downstream gas diverter and which comprises a flow channel which has a cross-section expanding in at least some areas in the main flow direction, having installed surfaces influencing the flow. In order to achieve a more compact implementation of the exhaust gas guide and simultaneously avoid or reduce pressure losses, the installed surfaces are implemented as a swirl device generating a leading edge swirl, which is situated in the diverging area of the flow channel and is implemented to distribute the exhaust gas flow uniformly over the flow cross-sectional area upon entry into the waste heat boiler or the gas diverter. Furthermore, the present invention relates to a method for mixing the exhaust gas of a gas turbine with hot exhaust gas streams generated in an auxiliary firing of at least one burner.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: August 31, 2010
    Assignee: Balcke Durr GmbH
    Inventors: Stefan Leser, Michael Kaatz, Miroslav Podhorsky
  • Publication number: 20070044475
    Abstract: The present invention relates to an exhaust gas guide of a gas turbine, which is situated between the gas turbine and a downstream waste heat boiler or a downstream gas diverter and which comprises a flow channel which has a cross-section expanding in at least some areas in the main flow direction, having installed surfaces influencing the flow. In order to achieve a more compact implementation of the exhaust gas guide and simultaneously avoid or reduce pressure losses, the installed surfaces are implemented as a swirl device generating a leading edge swirl, which is situated in the diverging area of the flow channel and is implemented to distribute the exhaust gas flow uniformly over the flow cross-sectional area upon entry into the waste heat boiler or the gas diverter. Furthermore, the present invention relates to a method for mixing the exhaust gas of a gas turbine with hot exhaust gas streams generated in an auxiliary firing of at least one burner.
    Type: Application
    Filed: August 23, 2006
    Publication date: March 1, 2007
    Inventors: Stefan Leser, Michael Kaatz, Miroslav Podhorsky
  • Publication number: 20060158961
    Abstract: The invention relates to a mixing device which is arranged in a flow channel and a mixing method for mixing a fluid flowing through the flow channel in a main direction of flow. The mixing device has a plurality of mixer disks which generate leading edge eddies in a fluid flowing through the flow channel in a main direction of flow. The mixer disks are arranged in mixer disk rows in row axes running essentially across the main direction of flow. The mixer disk rows are arranged side by side in the main direction of flow in a common flow channel section where the mixer disks of neighboring mixer disk rows are alternately angled in a positive angle of attack and in a negative angle of attack with respect to the main direction of flow. According to this process, the fluid flowing through the flow channel is mixed thoroughly by a leading edge eddy system, whereby in the mixing method presented here at least two contra-rotating leading edge eddy systems are generated in a common flow channel section.
    Type: Application
    Filed: June 29, 2005
    Publication date: July 20, 2006
    Inventors: Hans Ruscheweyh, Stefan Leser, Michael Kaatz
  • Patent number: 6964698
    Abstract: The invention relates to a gas supply for an electrostatic filter and an electrostatic filter arrangement which has an electrostatic filter and a gas supply. Here, the gas supply has an incoming flow channel of constant cross-sectional area, a gas inlet hood with cross-sectional area expanding in the direction of the electrostatic filter, and an admixture arrangement for a conditioning means, wherein at least one flow distributor is arranged in the expanded cross-sectional region of the gas inlet hood. Characterizing features include a first vortex arrangement generating a leading-edge vortex arranged in the incoming flow channel, a second vortex arrangement generating a leading-edge vortex arranged in the gas inlet hood before the flow divider in the gas flow direction, and the admixture arrangement arranged in the region of one of the two vortex arrangements.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: November 15, 2005
    Assignee: Balcke-Durr GmbH
    Inventors: Thomas Davis, Hans Ruscheweyh, Michael Kaatz, Stefan Leser