1. Tribology Group Luis San Andres Mast-Childs Professor Turbomachinery Laboratory Mechanical Engineering Department Texas A&M University May 2009 29 th TRC meeting http://phn.tamu.edu/TRIBGroup

2. Tribology Group Luis San Andres Mission: To advance state of the art in fluid film bearings for high performance turbomachinery Types of funded research projects: Engineering science fundamentals & development of computational engineering tools, Experimental – Bearing & Seal parameter identification Test-product verification & design validation Education

3. Tribology Group: Graduate Students L-R: Shraddha Sangelkar, Keun Ryu, Zach Ashton, Arian Vistamehr, Thomas Chirathadam, Dr. Tae Ho Kim, Sanjeev Sechagiri, Chunliu Mao missing: Yaying Niu, Dr. Adolfo Delgado, UGs: Laura Wells, Ramon Silva, Anthony Logan, Brian Buttler

4. Engineering Fundamentals & Tools Gas foil bearings for high temperatures NASA GRC (Sept 07- August 09) $ 284 k Low cost license to TRC members – Summer 2009 2009: Fortran codes & GUIs integrated into XLTRC 2 tool Fast programs – Physics based & engineering driven FEPressDam: Hydrodynamic bearings: including pressure dam bearings – THD model GFBpress: Gas foil bearings with side pressure (cooling) TiltPadHGB: Gas Hybrid Bearings – Tilting Pad FE_groove_oil_seal: Oil seal rings and squeeze film dampers with multiple grooves

5. HYBRID BRUSH SEALS TO IMPROVE GAS TURBINE EFFICIENCY Siemens (06-June 09) $ 182,943 Industry Grants High temperature seal test rig (300 C=572 F) HALO™ Seal Hybrid Brush Seal

6. Compare leakage: four seal types Industry Grants - Siemens HALO™ Seal Hybrid Brush Seal Flow factor Φ for four seal types versus inlet/exhaust pressure ratio [Ps/Pe] for increasing gas inlet temperatures (300 °C). Flow factor

7. SFD EXPERIMENTAL TESTING & ANALYTICAL METHODS DEVELOPMENT Large load (500 lb f ) SFD test rig Pratt & Whitney (08/08-12/10) $ 350k Industry Grants Static loader Shaker assembly (Y direction) Shaker assembly (X direction) Static loader Shaker in X direction Shaker in Y direction SFD test bearing -$80 k uncertain

8. 08-09 TRC funding Metal Mesh Foil Gas Bearings for Oil-Free Turbomachinery TRC (08-09) $ 40 k – funded 09/01/08 Gas Bearings for Oil-Free Turbomachinery TRC (08-09) $ 40 k – funded 11/01/08 Foil Bearings for Oil-Free Turbomachinery TRC (08-09) $ 40 k – funded 02/01/09 PLEASE NOTE START DATE FOR FUNDING Project funding << 12 month : Project reports < 12 month

9. Honeywell Turbocharging Technologies (2001-Jan 2009) $438 k Virtual Tool for Turbocharger rotordynamics Predicted shaft motion Measured shaft motion Ended: payments too late (do more with less … to do more with no $$)

10. http://reumicro.tamu.edu Education Summer Research Undergraduate Experience in Microturbomachinery & Manufacturing (10 students /year) x 3 y NSF (06-09) $ 259 k L. San Andres (MEEN) & W. Hung (ENT) To conduct hands-on training and research in mechanical, manufacturing, industrial, or materials engineering topics related to technological advances in microturbomachinery. To develop microturbines to enhance defense, homeland security, transportation, and aerospace applications. 13 students in Summer 2009 ASME Paper GT2009-59920 : Education Committee

11. Statistics 08/09 $ 210k + 120k (TRC) new research funding $ 549.9 k research expenditures (FY 08) Tribology Group Performance Publications 20082009Total Journal (peer reviewed) 5510 Conference (peer reviewed) 6713 Conference (NOT peer reviewed) 2 24 Accepted / awaiting publication 5P 2A 7 Extended Abstracts Student posters 2424 4 6464 Projects on Gas Foil Bearings (NASA GRC, TRC), Hybrid Brush Seals (Siemens), Turbochargers (HTT), SFDs (Pratt & Whitney) - 80k (PW) - 40k (HTT) Projects start too late: last one just 4 months b/f TRC

12. Rotordynamic Force Coefficients of a Hybrid Brush Seal: Measurements and Predictions, GT2009-59072 Turbocharger Nonlinear Response with Engine-Induced Excitations: Predictions and Test Data, GT2009-59108 Thermohydrodynamic Analysis of Bump Type gas Foil Bearings: A Model Anchored to Test Data, GT2009-59919 Dynamic Forced Response of a Rotor-Hybrid Gas Bearing System Due to Intermittent Shocks, GT2009-59199 Measurements of Structural Stiffness and Damping Coefficients in a Metal Mesh Foil Bearing, GT2009-59315 Identification of Squeeze Film Damper Force Coefficients from Multiple- Frequency, Non-Circular Journal Motions, GT2009-59175 Gas Bearing Technology for Oil-Free Microturbomachinery – Research Experience for Undergraduate (REU) Program at Texas A&M University, GT2009-59920 ASME Turbo Expo 2009, June 2009, Orlando, FLA

13. Tribology Group Students Prepared for global competency Learn communication skills (written & oral) Training in teams that work and deliver Ready for open-ended multidisciplinary problems with no unique answer Experience in research tied to industrial needs Learn of compelling need for professional integrity Graduated 08 PhD Adolfo Delgado ( GERC ) PhD Tae Ho Kim ( KIST ) Graduating June 09 MS Zach Ashton (Rocketdyne), MS Arian Vistamehr (PhD UT Austin) MS Yaying Niu (?), MS Thomas Chirathadam (?) DO MORE WITH LESS!

14. 2009 TRC Research Progress Reports Find Summaries in Tribology Group Annual Report (2009) DYNAMIC RESPONSE OF A ROTOR-AIR BEARING SYSTEM DUE TO BASE INDUCED PERIODIC MOTIONS Luis San Andrés, Yaying Niu, TRC-B&C-1-09 Measurements of Rotordynamic Performance in a Hot Rotor- Gas Foil Bearing System Luis San Andrés, Keun Ryu, Tae Ho Kim, TRC-B&C-2-09 Measurement of Bearing Drag Torque, Lift-Off Speed and Identification of Structural Stiffness and Damping in a Metal Mesh Foil Bearing Luis San Andrés, Thomas Chirathadam TRC-B&C-3-09

15. 2009 TRC Research Proposals Proposals in Tribology Group Annual Report (2009) Identification of Force Coefficients in an End Sealed SFD with Offset Multiple-Frequency Orbits (new) Gas Bearings for Oil-Free Turbomachinery (continuation IV)

16. A pain in the neck! Wear ! Lubrication path BEFORE Oct 08 After Oct 08 PEEK disks Bionic 6c man

17. Schedule of student presentations 8:40Introduction 8:50Dynamic Response of a Rotor-Air Bearing System due to Base Induced Periodic Motions 9:15Measurement of Bearing Drag Torque, Lift-Off Speed and Identification of Structural Stiffness and Damping in a Metal Mesh Foil Bearing 9:45Measurements of Rotordynamic Performance in a Hot Rotor- Gas Foil Bearing System 10:20 Proposals Gas Bearings for Oil-Free Turbomachinery Identification of Force Coefficients in an End Sealed SFD with Offset Multiple-Frequency Orbits Thanks for your continued support and encouragement!

18. Off to Singapore