Session: 27-02: Rotordynamic Design and Application

Paper Number: 151665

The Future of Full Engine Dynamic Simulation for Gas Turbines 

The new rotordynamic simulation approach has been developed to digitalize and integrate all rotordynamic analysis from conceptual to utilization product life phases.

The current simulation approach required collect all GT data by users independently and retrieve needed parameters from different sources (sometimes unavailable) during modelization and validation (FEM analysis and tests) phases increasing design lead time and costs.

The new approach called "Full Tube" has been developed in cooperation with Siemens/ Simcenter.

The most beneficial of the new process are the first phases when design goes through conceptual to optimization steps. During these phases the X-section is imported inside Simcenter 3D rotodynamic tool to prepare the model, apply boundary conditions & loads, run the simulation and export the optimized parameters. The tool is based on an automatized approach and guarantees to export a model including all features and an information necessary to complete the rotodynamic analysis. It allows to evaluate vibrations of full train considering whole GT structure and to determine interactions of rotors, casing and baseplate components interdependently.

 Exploiting this fact, the scope of verification has been even extended to permissible limits not only on rotating parts but also on stationary without the need to perform separate analyses.

The tool also provides full functionality for bearing selection and data analysis in accordance with API616 requirements.

Authors in the presentation focuses on rotordynamic of NovaLT gas turbine verification and validation process considering interaction between harmonic components of rotors and structure, considering variable loading conditions: full speed no load, full speed full load.

Finally, the presentation shows that new approach of gas turbine rotordynamic verification has good coherence with the test results which will allows to skip the test validation phase in the future.

Presenting Author: Robert Pietrzak Baker Hughes

Presenting Author Biography: I am currently Principal Engineer for Gas Turbine at Baker Hughes, in Warsaw, Poland.
I supervise the calculation activities related to Gas Turbine/ Centrifugal Compressor design and testing and has specialized in the areas of rotordynamic design and vibration data analysis.

I have received a Ph.D. degree in Mechanical Engineering from University of Warsaw in 2008.
I have joined Baker Hughes in 2008 as Centrifugal Compressor/ Gas Turbine Rotordynamic Engineer, after an experience in the Space industry.

Authors:

Robert Pietrzak Baker Hughes
Lorenzo Naldi Baker Hughes
Stefano Canavesi Siemens
Caroline Raick Siemens