Aerosflexibility and structural calculations

1. Tensions and frequency of vibrations of its own blades and flaps

  • Tensions and frequency of vibrations of own rotor blades composed of 96 blades with length L = 0.5 [m], 19 degrees turbine 13UC105 for ALSTOM POWER Polska, 1999.
  • Tensions and frequency of vibrations of own rotor blades consisting of 144 blades of length L = 0.1341 [m], 16 degrees of turbine 13UC100 for ALSTOM POWER Polska, 2001, (Fig. 1).

Figure 1.

  • Tensions and vibration frequencies of the own rotor consisting of 144 blades of length L = 0.1203 [m], 15 degree turbine 13UC105 for ALSTOM POWER Polska, 2002, (Figures 2, 3).

Figure 2. Figure 3.

  • Tensions and vibration frequencies of their own rotor consisting of 144 blades with length L = 0.1341 [m], 16 degree turbine 13UC100 for ALSTOM POWER Polska, 2003.
  • Calculation of 3D non-stationary turbine forces for rotating and vibrating blades with unsymmetrical pressure distribution behind rotor blades due to a 16 degree reduction of 13UC100 turbine for ALSTOM POWER Polska, 2003.

2. Tensions and vibration frequencies of self-damaged shaft mounted discs

  • Sokołowski J., Rągkowski R., Kwapisz L.: Frequencies and Modes of Rotating Flexible Shrouded Bladed Discs-Shaft Assemblies, TASK Quarterly 7, 2, 215-231, 2003. (Figure 4)
  • Rąkowski R., Kwapisz L., Sokolowski J., Karpiuk R., Ostrowski P. and Radulski W.: Natural Frequencias and Mode Shapes of Rotating Three Shrouded Bladed Discs Placed on the Part of the Shaft., The 2nd International Symposium on Stability Control of Rotating Machinery, Gdańsk 4-8 August 2003, p.381-392

Figure 4.

  • Sokołowski J. R. R.: Natural Frequencies and Modes Shapes of Two Rigid Bladed Discs on the Shaft, TASK Quarterly 9, 2003 (print acceptance) (Figures 5, 6, 7, 8)

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Aerostress calculation

1. Calculation of 2D and 3D flater for twisted blades

  • Rąkowski R., Gnesin V., Kovalyov A.: The 2D Flutter of Bladed Disc in an Incompressible Flow, in book T.H. Fransson: Unsteady Aerodynamics and Aeroelasticity of Turbomachines, Procedures of the 8th International Symposium held in Stockholm, Sweden, 14-18 September 1997, 317-334, Kluwer Academic Publishers, 1998.
  • Gnesin V., Rielkowski R., Kolodyazhnaya L.: A Coupled Fluid-Structure Analysis for 3D Flutter in Turbomachines, ASME Paper No 2000-GT-380, 2000.
  • Rąkowski R., Gnesin V., Kolodyozhnaya L.: The 3D Coupled Fluid-Structure Aeroelastic Oscillations in the Long Steam Turbine Blade, p.841-861 in Book: Unsteady Aerodynamics, Aeroacustics and Aeroelastocity of Turbomachines edited by P. Ferrand, S. Aubert, Presses Universitaires de Grenoble, 2001.
  • Gnesin V., Governmentkowski R.: A Coupled Fluid-Structure Analysis for 3D Inviscid Flutter of IV Standard Configuration, Journal of Sound and Vibration, 251(2), 315-327, 2002.

2. 3D stationary forces operating in a degree with vibrating and rotating rotor blades in subsonic, transonic and supersonic non-stick flow with unsymmetrical pressure distribution behind rotor blades

  • Gnesin V., Governmentkowski R.: The 3D-Unsteady Aerodynamic Forces- The Forced Vibration of Bladed Discs, in book T.H. Fransson: Unsteady Aerodynamics and Aeroelasticity of Turbomachines, Procedures of the 8th International Symposium hell in Stockholm, Sweden, 14-18 September 1997, 613-632, Kluwer Academic Publishers, 1998.
  • Rógkowski R., Gnesin V.: 3D Unsteady Forces of the Transonic Flow Through a Turbine Stage with Vibrating Blades, ASME Paper GT-2002-300311, 2002, (Fig. 9).

Figure 9.

  • Gnesin V., Kolodyazhnaya L., Rągkowski R.: A Numerical Modelling of Stator-Rotor Interaction in Turbine Stage with Oscillating Blades, Proc. of 5th International Symposium on FSI, AE&FIV+N, 17-22 November 2002, New-Orlean, Louisiana, USA, IMECE2002-32975, AERO-15A.