1. 1 Turbopower Program Conference April 14-15, 2010, Linköping Compressor Technology Synthesis María Mayorca, KTH 2010-04-14

2. 2 Synthesis

3. 3 State-of-the-Art Structural Dynamics Analyses (Bladh 2000, Martel 2008, Petrov 2008) 3D detailed modal and forced response analyses Model Order Reduction Techniques (AMM, FMM, Guyan, Craig Bampton) Fluid-Structure Interaction (Moffatt and He 2005) Decoupled (CFD and FE separated), Partially Coupled (Iterations), Coupled (Time marching CFD vs FE) HCF Prediction Methods Modal Force Indicators Function (Vahdati et al., 2008) Ranking values (Mårtensson et al., 2009) STRUFLO (Moyroud, 1998)

4. 4 Beyond State-of-the-Art What is new Integration of the Aeromechanical Design Change in a Numerical Tool Estimation of the contribution of different parts of the aeromechanical design chain to the final fatigue risk Challenges Standardization of aeromechanical practices Adaptability to different FE and CFD solvers Keep up with new emerging methods and techniques Consideration of mistuning

5. 5 Synthesis

6. 6 Compressor Stage Hulda Compressor (Mårtensson et al. 2007)

7. 7 5 Struts

8. 8 15 VIGV’s

9. 9 23 Rotor Blades

10. 10 51 Stator Blades

11. 11 Blade to Analyze

12. 12 Numerical Speed Up

13. 13 Numerical Speed Up

14. 14 Numerical Speed Up

15. 15 Numerical Speed Up

16. 16 Numerical Speed Up

17. 17 CFD and FE Compressor blade HCF determination Unsteady CFD calculations 3D Navier Stokes, Volsol Scaling (Sensitivity study, <5%) Aerodynamic damping 1% Structural Model: Blade alone Rotor blade

18. 18 Campbell Diagram 35 Crossings

19. 19 Stress Level Respect to HCF Critical node

20. 20 Relation to TurboVib Synthesis Physically Possible Variations SynthesisWP1WP2WP3MistuningStress VariablesfgenΔfgendraΔdradrsΔdrsAmagΔfrΔdraImpact Positive1.09N30%1%-5%0.01%01.21.5%15%104% Negative1.09N30%1%5%0.01%2500%1.2-1.5%-15%-75% Negative ImpactPositive Impact

21. 21 Physical Contributions

22. 22 Accuracy

23. 23 Research Efforts Planned Validation of AROMA with simple specimen: Modal Analysis Forced Response Fatigue limit Inclusion of the disk and mistuning in Hulda blade Validation of vibration amplitudes with tip timing data of Hulda Estimation of the error and “physical effects” throughout the chain from the preliminary state currently shown As the research in the other WP:s continue their results will be picked up in the synthesis