Transcript No Slide Title

31th TRC meeting
Tribology Group
Year XX
May 2011
Luis San Andres
Mast-Childs Professor
Turbomachinery Laboratory
Mechanical Engineering Department
Texas A&M University
http://rotorlab.tamu.edu
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
2010-2011
Missing
Keun Ryu
(Borg-Warner)
UGs
James Law
Sarabeth
Froneberger
Thomas
Chirathadam
Feng
Yu
Jose
Hernandez
Alain
Anderson
Paola
Mahecha
Qing
Liu
Yujiao Tao
Sanjeev
Seshaghiri
Industry Grants
SFD EXPERIMENTAL TESTING & ANALYTICAL METHODS DEVELOPMENT
Large load (500 lbf) SFD test rig
Pratt & Whitney (08/08-12/10) $ 330k
Static loader
Shaker assembly
(Y direction)
Shaker assembly
(X direction)
Static loader
Shaker in
Y direction
Shaker in
X direction
TEST RIG available for further
identification of commercial
SFD test
SFDS
bearing
Analysis/test product verification & design validation
VIRTUAL TOOL for TC rotordynamics
Integration of nonlinear rotordynamics & bearing
performance – reduces time for prototype development
(35%) and saves costs in product development (30%)
Honeywell Turbocharging Technologies
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
0.05
Motion Amplitude
(2001-2012)
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
Analysis/test product verification & design validation
Thermal Energy Transport Analysis for Floating
Ring Bearings in Turbochargers
Honeywell Turbocharging Technologies
(09/10-09/12) $ 208k
Oil inlet
CASING
TB
Shaft (journal)
TJ
RING
Analysis of hydrodynamic
bearing with enhancements in
heat transfer model + prediction
capability of external excitation and
frequency response function modeling
capability
2010-11 TRC funding
Measurement of leakage in a novel all metal non-contacting
annular seal at high temperatures
TRC (10-11) $ 39.8k (1st year)
Cold air inlet
Insulation
Pressurization Vessel
Bearing Assembly
Seal
Air inlet
Shaft
Test seal
Centering spring
Rotor
Exhaust duct
Motor
High temperature seal test rig (300 C=572 F)
HALO™ Seal
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).
2010-11 TRC funding
Computational model for tilting
pad journal bearings
TRC (10-11) $ 34.8k (1st year)
Carter & Childs,
ASME GT2008-50069
For high load bearings (>
150 psi), improve
correlation to
experimentally derived
force coefficients by
adding pad-pivot
flexibility and fluid
energy transport &
thermal effects
Fluid
W, static
load
e
Journal
Pad

Pivot
Rotor speed
2010-11 TRC funding
Automated Analysis of XLTRC2 Time
Transient Responses in Nonlinear Rotor
Bearing Systems
TRC (10-11) $ 34.8k (1 year)
1 × fn
2 × fn
3 × fn
100
0
0
5
X
10
15
20
speed (kRP M)
25
30
10
20
30
Rotor speed [krpm]
35
40
40
24
1X
3 × fn
2 × fn
13
100
-100
½3 WFR ½WFR
1 × fn
Vertical response (x)
2
0
Rotor speed [krpm]
0
35
100
Response (um)
Amplitude [µm]
Vertical response (x)
Automate output of
XLTRC2 time
response of NL
rotor-bearing
motions &
characterize
frequency and
modal content
0WFM _X
200
400
600
Frequency [Hz]
800
WFM _Y
Other projects
Computational analysis of textured gas
face seals for steam turbines
CIATEQ A.C. (Mexico) (2010-11) Support 1 grad student
Rotating
textured
surface
Shape groove
Outer seal dam

Inner seal dam
r

Ro
Rgo
Typical steam turbine for
lubrication system
mechanical drive
Ri
Rgi
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 (2003-2009) $ 312 k
NSF (2003-2006) $ 255.5k
NASA GRC (2007-2009) $ 284.6k
Capstone (2007) $ 64.7 k
State of the art predictive tools
benchmarked to test data
Tribology Group Performance
2010
2011
Total
Funding
Publications
$ 208,340 (HTT) +
153.5k (P&W) +
$109k (TRC)
Journal (peer reviewed)
11
5
16
Conference (peer reviewed)
7
5
12
Conference (NOT peer
reviewed)
2
$ 343.8 k research
expenditures (FY 10-11)
Accepted / awaiting
publication
2
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
with
lessnothing!
Domore
more
with
Graduating 2010/11
PhD Keun Ryu (BorgWarner)
MS Sanjeev Seshagiri
MS Paola Mahecha
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
#
years
Cost
1
$ 35,000
1
$ 35,558
Linear-Nonlinear Force Coefficients for Squeeze
Film Dampers
1
$37,108
Metal Mesh Foil Bearings: Operation at High
Temperature
1
$38,608
Continuation
Measurement of leakage in a novel all metal
non-contacting annular seal at high
temperatures
Computational model for tilting pad journal
bearings
New
Summaries in Tribology Group Annual Report (2011)
2011 TRC Meeting
See also http://rotorlab.tamu.edu/me489 for
Practices of Modern Engineering Course
Questions:
Luis San Andres: [email protected]