Tribology Group
Luis San AndresMast-Childs Professor
Turbomachinery Laboratory
Mechanical Engineering DepartmentTexas A&M University
May 2009
29th TRC meeting
http://phn.tamu.edu/TRIBGroup
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
Tribology Group: Graduate Students
L-R: Shraddha Sangelkar, Keun Ryu, Zach Ashton, Arian Vistamehr, Thomas Chirathadam, Dr. Tae Ho Kim, Sanjeev Sechagiri, Chunliu Maomissing: Yaying Niu, Dr. Adolfo Delgado, UGs: Laura Wells, Ramon Silva, Anthony Logan, Brian
Buttler
Engineering Fundamentals & Tools
Gas foil bearings for high temperaturesNASA GRC (Sept 07- August 09) $ 284 kLow cost license to TRC members – Summer 2009
2009: Fortran codes & GUIs integrated into XLTRC2 toolFast 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
HYBRID BRUSH SEALS TO IMPROVE GAS TURBINE EFFICIENCYSiemens (06-June 09) $ 182,943
Industry Grants
InsulationShaft
Bearing Assembly
Exhaust duct
Air inlet
Rotor
Test sealPressurization Vessel Centering spring
Cold air inlet
MotorSeal
High temperature seal test rig (300 C=572 F)
HALO™ Seal
Hybrid Brush Seal
Compare leakage: four seal types
Industry Grants - Siemens
HALO™ Seal
Hybrid Brush Seal
0
5
10
15
20
25
30
35
40
1.0 2.0 3.0 4.0 5.0 6.0
Pressure Ratio [Ps/Pe]
Flow
Fac
tor
[kg-
K0.
5/(M
Pa-
m-s
)]
Labyrinth SealBrush SealHybrid Brush SealHALO™ Seal
Flow factor Φ for four seal types versus inlet/exhaust pressure ratio [Ps/Pe] for increasing gas inlet temperatures (300 °C).
Flow factor
DP
Tm
s
SFD EXPERIMENTAL TESTING & ANALYTICAL METHODS DEVELOPMENT
Large load (500 lbf) SFD test rigPratt & 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
$182,562.3 $119,918.5Year 1 Year 22,009 2,010
-$80 k uncertain
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 FUNDINGProject funding << 12 month : Project reports < 12 month
Honeywell Turbocharging Technologies (2001-Jan 2009) $438 k
Virtual Tool for Turbocharger rotordynamics
Predicted Steady-State Waterfall / Y DisplacementRBS with ODminIDmax / Oil Texaco-Havoline Energy 5W30, 150°C, 4bar
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
Frequency (Hz)
Mo
tio
n A
mp
litu
de
Subsynchronous ComponentsSynchronous Component
Predicted Steady-State Waterfall / Y DisplacementRBS with ODminIDmax / Oil Texaco-Havoline Energy 5W30, 150°C, 4bar
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
Frequency (Hz)
Mo
tio
n A
mp
litu
de
Subsynchronous ComponentsSynchronous Component
Measured Steady-State Waterfall / Y DisplacementRBS with ODminIDmax / Oil Texaco-Havoile Energy 5W30, 150°C, 4bar
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
Frequency (Hz)
No
rma
lize
d N
on
lin
ea
r R
es
po
ns
e
Subsynchronous ComponentsSynchronous Component
Measured Steady-State Waterfall / Y DisplacementRBS with ODminIDmax / Oil Texaco-Havoile Energy 5W30, 150°C, 4bar
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
Frequency (Hz)
No
rma
lize
d N
on
lin
ea
r R
es
po
ns
e
Subsynchronous ComponentsSynchronous Component
Predicted shaft motion Measured shaft motion
Ended: payments too late(do more with less … to do more with no $$)
http://reumicro.tamu.eduEducationSummer 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
Statistics 08/09
$ 210k + 120k (TRC)new research
funding
$ 549.9 k research expenditures (FY 08)
Tribology Group Performance
Publications 2008 2009 Total
Journal (peer reviewed) 5 5 10Conference (peer reviewed) 6 7 13Conference (NOT peer
reviewed)2 2 4
Accepted / awaiting publication
5P2A
7
Extended Abstracts
Student posters
24
4 64
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
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
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 08PhD 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!
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-1-09Measurements of Rotordynamic Performance in a Hot Rotor-
Gas Foil Bearing System Luis San Andrés, Keun Ryu, Tae Ho Kim,
TRC-B&C-2-09Measurement 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
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)
A pain in the neck!
Wear !
Lubrication path
BEFORE Oct 08After Oct 08
PEEK disks
Bionic 6c man
Schedule of student presentations
8:40 Introduction
8:50 Dynamic Response of a Rotor-Air Bearing System due to Base Induced Periodic Motions
9:15 Measurement of Bearing Drag Torque, Lift-Off Speed and Identification of Structural Stiffness and Damping in a Metal Mesh Foil Bearing
9:45 Measurements 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!
Off to Singapore