Transcript No Slide Title

29th TRC meeting
Luis San Andres
Mast-Childs Professor
Turbomachinery Laboratory
Mechanical Engineering Department
Texas A&M University
May 2009
Tribology Group
http://phn.tamu.edu/TRIBGroup
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
Luis San Andres
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
Engineering Fundamentals & Tools
2009: Fortran codes & GUIs integrated into XLTRC2 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
Gas foil bearings for high temperatures
NASA GRC (Sept 07- August 09) $ 284 k
Low cost license to TRC members – Summer 2009
Industry Grants
HYBRID BRUSH SEALS TO
IMPROVE GAS TURBINE
EFFICIENCY
Hybrid Brush Seal
Siemens (06-June 09) $ 182,943
Cold air inlet
Insulation
Pressurization Vessel
Bearing Assembly
Seal
Air inlet
Shaft
Test seal
Centering spring
Rotor
HALO™ Seal
Exhaust duct
Motor
High temperature seal test rig (300 C=572 F)
Industry Grants - Siemens
Compare leakage: four seal types
Flow Factor [kg-K 0.5/(MPa-m-s)]
40
Labyrinth Seal
Brush Seal
Hybrid Brush Seal
HALO™ Seal
35
30
25
Hybrid Brush Seal
20
15
10
5
0
1.0
2.0
Flow factor
m T

Ps D
3.0
4.0
Pressure Ratio [Ps/Pe]
5.0
6.0
HALO™ Seal
Flow factor Φ for four seal types versus inlet/exhaust
pressure ratio [Ps/Pe] for increasing gas inlet
temperatures (300 °C).
Industry Grants
SFD EXPERIMENTAL TESTING & ANALYTICAL METHODS DEVELOPMENT
Large load (500 lbf) SFD test rig
Pratt & Whitney (08/08-12/10) $ 350k
Static loader
$182,562.3
$119,918.5
Year 1
2,009
Year 2
2,010
-$80 k
Shaker assembly
(Y direction)
Shaker assembly
(X direction)
uncertain
Static loader
Shaker in
Y direction
Shaker in
X direction
SFD test
bearing
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
Virtual Tool for Turbocharger rotordynamics
Honeywell Turbocharging
Ended:
payments
Technologies (2001-Jan 2009)
$438
k too late
(do more with less …
to do more with no $$)
Predicted shaft motion
Measured shaft motion
Measured Steady-State Waterfall / Y Displacement
RBS with ODminIDmax / Oil Texaco-Havoile Energy 5W30, 150°C, 4bar
Predicted Steady-State Waterfall / Y Displacement
RBS with ODminIDmax / Oil Texaco-Havoline Energy 5W30, 150°C, 4bar
0.07
0.07
Subsynchronous Components
Subsynchronous Components
Synchronous Component
Synchronous Component
0.06
Normalized Nonlinear Response
0.06
Motion Amplitude
0.05
0.04
0.03
0.02
0.01
0.05
0.04
0.03
0.02
0.01
0
0
500
1000
1500
2000
2500
3000
3500
Frequency (Hz)
4000
4500
5000
5500
6000
0
0
500
1000
1500
2000
2500
3000
3500
Frequency (Hz)
4000
4500
5000
5500
6000
Education
http://reumicro.tamu.edu
Summer Research Undergraduate
Experience in Microturbomachinery &
Manufacturing
(10 students /year) x 3 y
NSF (06-09) $ 259 k
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.
ASME Paper GT2009-59920 : Education Committee
L. San Andres (MEEN) & W. Hung (ENT)
13 students in Summer 2009
Tribology Group Performance
Statistics 08/09
- 80k (PW) - 40k (HTT)
2008
2009
Total
Journal (peer reviewed)
5
5
10
Conference (peer reviewed)
6
7
13
2
2
4
5P
2A
7
4
6
4
Publications
$ 210k + 120k (TRC)
Conference (NOT peer
reviewed)
new research
Accepted / awaiting
funding Projects start too late: publication
last one just 4
months b/f TRC
Extended Abstracts
Student posters
2
4
$ 549.9 k research
expenditures (FY 08)
Projects on Gas Foil Bearings (NASA GRC, TRC),
Hybrid Brush Seals (Siemens), Turbochargers
(HTT), SFDs (Pratt & Whitney)
ASME Turbo Expo 2009, June 2009, Orlando, FLA
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 MultipleFrequency, 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
Tribology Group Students
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
(?)
•
•
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!
2009 TRC Research Progress Reports
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 RotorGas 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
Find Summaries in Tribology Group Annual Report (2009)
2009 TRC Research Proposals
Identification of Force Coefficients in an End
Sealed SFD with Offset Multiple-Frequency
Orbits (new)
Gas Bearings for Oil-Free Turbomachinery
(continuation IV)
Proposals in Tribology Group Annual Report (2009)
A pain in the neck!
Lubrication path
Wear !
Bionic
6c man
PEEK disks
BEFORE Oct 08
After Oct 08
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 RotorGas 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