Rok 2014

• Explanation of Reduction of Pressure Forces in Turbine Chamber Seals

  Publikacja

  • K. Kosowski
  • R. Stępień

  - Advances in Vibration Engineering - Rok 2014

  The paper describes a chamber seal reducing the aerodynamic forces created in shroud seals. Asymmetrical pressure distribution (due to rotor-stator eccentricity) in the blade tip clearance leads to the creation of pressure forces acting on the blade shroud. By increasing the volume above the shroud, the pressure distribution becomes more uniform on the whole shroud circumference and the effect of rotor eccentricity is reduced....

  Pełny tekst do pobrania w serwisie zewnętrznym

• Partial Admission Stages of High Efficiency for a Microturbine

  Publikacja

  • K. Kosowski
  • R. Stępień
  • W. Włodarski
  • M. Piwowarski
  • Ł. Hirt

  - Advances in Vibration Engineering - Rok 2014

  The paper presents the results of a design analysis of a microturbine for a cogeneration micro-power plant working in accordance with organic Rankine cycle. The heat power of the plant is assumed equal to 20kW and the corresponding available electric output is estimated to be about 3 kW. After the design analysis, the axial turbine with partial admission in all stages was built and tested experimentally. Special attentionwas paid...

• Performance Characteristics of a Micro-Turbine

  Publikacja

  • K. Kosowski
  • W. Włodarski
  • M. Piwowarski
  • R. Stępień

  - Advances in Vibration Engineering - Rok 2014

  In the paper a design of a multi-stage micro-turbine with partial admission of all the stages is described in detail and the results of particular experimental investigations and numerical calculations are shown, followed by conclusions. The co-generative micro-power plant with the HFE7100 as a working medium was designed and built for experimental investigations. The values of the main cycle parameters were as follows:heat output:...

Rok 2013

• Multistage Coupling of Eight Mistuned Bladed Disk on a Solid Shaft, Part 1 Free Vibration Analysis

  Publikacja

  • R. Rządkowski
  • A. Maurin

  - Advances in Vibration Engineering - Rok 2013

  ..

Rok 2012

• Pressure Pulsations in Turbine Blade Seal

  Publikacja

  • K. Kosowski
  • M. Piwowarski
  • W. Włodarski

  - Advances in Vibration Engineering - Rok 2012

  The paper presents the results of experimental investigations into pressure forces generated in a turbine labyrinth seal. The experiments were performed on a single-stage air model turbine of the impulse type. The performed experimental research proved that in a shroud clearance the pressure pulsates and the effects of the nozzle trailing edge thickness as well as the influence of the rotor blades are observed. The exemplary results...

Rok 2011

• The Method of Reduction of Aerodynamic Forces Generated in Turbine Blade Seals

  Publikacja

  • K. Kosowski
  • R. Stępień

  - Advances in Vibration Engineering - Rok 2011

  Opisano metodę zmniejszania sił wymuszających drgania aerodynamiczne poprzez zastosowanie nowego uszczelnienia nadbandażowego typu komorowego. Efektywność stosowania uszczelnienia komorowego potwierdzono obliczeniami numerycznymi i badaniami eksperymentalnymi.