Tribology Group Year XX Luis San Andres Mast-Childs Professor Turbomachinery Laboratory Mechanical Engineering Department Texas A&M University May th TRC meeting

Tribology Group 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

Tribology Group Students Thomas Chirathadam Feng Yu Alain Anderson Qing Liu Jose Hernandez Paola Mahecha Yujiao TaoSanjeev Seshaghiri Missing Keun Ryu (Borg-Warner) UGs James Law Sarabeth Froneberger

SFD EXPERIMENTAL TESTING & ANALYTICAL METHODS DEVELOPMENT Large load (500 lb f ) SFD test rig Pratt & Whitney (08/08-12/10) $ 330k 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 TEST RIG available for further identification of commercial SFDS

Analysis/test product verification & design validation Honeywell Turbocharging Technologies ( ) VIRTUAL TOOL for TC rotordynamics Integration of nonlinear rotordynamics & bearing performance – reduces time for prototype development (35%) and saves costs in product development (30%) Predicted shaft motion Measured shaft motion

Thermal Energy Transport Analysis for Floating Ring Bearings in Turbochargers Honeywell Turbocharging Technologies (09/10-09/12) $ 208k Analysis of hydrodynamic bearing with enhancements in heat transfer model + prediction capability of external excitation and frequency response function modeling capability Analysis/test product verification & design validation

High temperature seal test rig (300 C=572 F) HALO™ Seal Measurement of leakage in a novel all metal non-contacting annular seal at high temperatures TRC (10-11) $ 39.8k (1st year) TRC funding

Compare leakage: four seal types 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

Computational model for tilting pad journal bearings TRC (10-11) $ 34.8k (1st year) For high load bearings (> 150 psi), improve correlation to experimentally derived force coefficients by adding pad-pivot flexibility and fluid energy transport & thermal effects ASME GT Carter & Childs, TRC funding

Automated Analysis of XLTRC 2 Time Transient Responses in Nonlinear Rotor Bearing Systems TRC (10-11) $ 34.8k (1 year) Automate output of XLTRC 2 time response of NL rotor-bearing motions & characterize frequency and modal content TRC funding

Other projects Computational analysis of textured gas face seals for steam turbines CIATEQ A.C. (Mexico) ( ) Support 1 grad student Typical steam turbine for lubrication system mechanical drive Non-contacting gas face seal with textured grooves Model novel textured face seal geometries and develop GUI for whole seal cartridge. Replacements to carbon rings increase turbine efficiency and reduce leakage

Unfunded projects Gas bearings for high turbomachinery: (a) Thermal management of foil bearings (b) Dynamic forced performance of metal mesh foil bearings Support for two students from licensing Gas Seal and Gas Foil Bearing codes Past funding includes TRC ( ) $ 312 k NSF ( ) $ 255.5k NASA GRC ( ) $ 284.6k Capstone (2007) $ 64.7 k State of the art predictive tools benchmarked to test data

Funding $ 208,340 (HTT) k (P&W) + $109k (TRC) $ k research expenditures (FY 10-11) Tribology Group Performance Publications Total Journal (peer reviewed) Conference (peer reviewed) Conference (NOT peer reviewed) 2 2 Accepted / awaiting publication 3 3

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 Do more with less Graduating 2010/11 PhD Keun Ryu (Borg- Warner) MS Sanjeev Seshagiri MS Paola Mahecha Do more with nothing!

2011 TRC Research Progress Reports Comparison of leakage between a labyrinth seal and an all-metal compliant gas seal at high temperature (completed TRC-S-02-11) – Alain Anderson presents progress Computational model for tilting pad journal bearings (in progress) – Yujiao Tao presents progress

2011 TRC Project Proposals Summaries in Tribology Group Annual Report (2011) Continuation # years Cost Measurement of leakage in a novel all metal non-contacting annular seal at high temperatures 1 $ 35,000 Computational model for tilting pad journal bearings 1 $ 35,558 New Linear-Nonlinear Force Coefficients for Squeeze Film Dampers 1 $37,108 Metal Mesh Foil Bearings: Operation at High Temperature 1 $38,608

2011 TRC Meeting Questions: Luis San Andres: See also forhttp://rotorlab.tamu.edu/me489 Practices of Modern Engineering Course