1. The information contained in this document is Volvo Aero Corporation Proprietary Information and it shall not – either in its original or in any modified form, in whole or in part – be reproduced, disclosed to a third party, or used for any purpose other than that for which it is supplied, without the written consent of Volvo Aero Corporation. Any infringement of these conditions will be liable to legal action. COMPRESSORS

2. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 2 April 2010 COMP – TurboVib Who is who ? University Damian Vogt – Project leader, HPT Maria Mayorca presenting synthesis Floria Fruth presenting forcing Nenad Glodic presenting aero damping Leif Kari, Professor, MWL Jia Sun presenting damping Mårten Olsson, Professor Solid Mechanics Salar Sadek presenting HCF Daniel Sandberg new research student Industry Hans Mårtensson, VAC Johan Forsman, VAC Ronnie Bladh, Siemens Björn Sjödin, Siemens

3. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 3 April 2010 COMP – TurboVib A co-ordinated project across disciplines Why are we here? How is aeromechanics done today? How will we do it after this TurboVib project is done?

4. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 4 Blade vibration – a show stopper to development Most engine development programs are affected Appears late, sometimes in operation, hence expensive Risk leads to conservative design choices Appears in new environments Flight operating point or new aircraft Climate April 2010

5. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 5 Example of compressor evolution in the V2500 family April 2010 Wenger U., Wehle P., "Development of the Rolls-Royce 10 Stage High Pressure Compressor Family", ISABE-2009-1300 For each step, different vibration problems were reported Simulation leads to lead strain gauge testing

6. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 6 Blade vibration – a show stopper to development Most engine development programs are affected Appears late, sometimes in operation, hence expensive Risk leads to conservative design choices Appears in new environments Flight operating point or new aircraft Climate We can test, but late and not in all conditions, for all varieties We can compute but not include ”everything” physical April 2010

7. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 7 April 2010

8. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 8 Blade vibration – a show stopper to development Most engine development programs are affected Appears late, sometimes in operation, hence expensive Risk leads to conservative design choices Appears in new environments Flight operating point or new aircraft Climate We can test, but late and not in all conditions We can compute but not include ”everything” physical April 2010 Understanding and mastering destructive blade vibration will provide better efficiency machines and allow faster introduction to service of more efficient machines.

9. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 9 On-going Research programs EU/USA GUIDE Consortium / USA Flutter and forced response FUTURE / EU Stability analysis (flutter) and validation of tools specifically for flutter Classical program compute-test-validate CRESCENDO / EU Aiming towards analytical/virtual qualification, re-enforcing a clear trend Very demanding on methods April 2010

10. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 10 Aiming towards the challenge of ACARE SRA2 "... make design of a complete virtual aircraft up to certification a reality... "ACARE SRA2 CRESCENDO CRESCENDO EU FP7 Call 2 - 2009-2012 EU Request for proposals: “AAT.4.4.1. Integrated approach to full virtuality in design and product development within the extended enterprise” Project proposal: C Collaborative R Robust E Engineering … using S Simulation C Capability E Enabling N Next D Design O Optimisation April 2010

11. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 11 Blade Vibration/HCF - today Try to design away vibration Campbell rules Calculate aerodynamic damping Minimize ”risk” – reduce forcing Test and detect vibration Solve by limiting operation ”Fix” inside narrow design space April 2010

12. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 12 Blade Vibration/HCF - today Try to design away vibration Campbell rules Calculate aerodynamic damping Minimize ”risk” – reduce forcing Test and detect vibration Solve by limiting operation ”Fix” inside narrow design space April 2010 Adress error sources in analyses and possibilities in design variable Address fatigue early and quantitatively requires integrating tools and understanding Eventually adress failure risk rather than ”amplitude and margin”

13. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 13 How will we work ? One process for which error sources and sensitivity, can be analyzed, hence quality validate AROMA - An integrated tool for aeromechanics Make efficient use of available advanced tools for aerodynamics and structures Take advantage of research/technology improvements in the disciplines April 2010

14. 10110 Utg. 4 Volvo Aero Corporation Proprietary Information. This information is subject to restrictions on first page. 7161HM, Hans Mårtensson 10110 Utg. 11 Slide 14 And now … April 2010 This was the easy part.. Our research students will now make the magic happen…. Florian please…