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7/21/2019 Tribology Applications 2010
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Tribology needs for the 2000’s
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Tribology?What is it for?
Will I ever use it?
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Tribology embodies the study of
friction, lubrication and wear .
and involves mechanical processes (motion and deformation).
A tribologist performs engineering work to predict and improve
the performance (how much) and reliability (for how long) of
a mechanical system.
Fluid mechanics
Solid mechanics
Material science
Manufacturing
Tribology
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Applications:Ultra-performance (reinjection)
compressors: > 10,000 psi (700 bar)
Dual gas turbines (fuel and coal):secondary combustion on turbine side
Smart engines and structures:control of surge and stall in compressors, elimination of
vibration and noise through changes in configuration,
Unmanned Aerial Vehicles:war at a distance, no casualties
surveillance
Rotordynamics,
materials,hydrodynamics
composite materials,
coatings,
extreme environments
electronics
coatings: nanopowders
elasto-hydrodynamics
surface engineering,
materials,
controls and
electronics.
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Applications:
Meso-micro turbomachinery:
dime size fuel cells (4 kW), 1 million rpm
Reusable rocket engines:
LH2 and LOx fluid film bearings and seals
Oil-free gas turbines and generators:(mid size to 0.5 MW): foil gas bearings,
damper seals.
Information storage > 100 Gbytes/in2:lubricated bearings and textured surfaces
with operation films or gaps less than 0.1 m
Rotordynamics,
litho processes,materials
hydrodynamic
lubrication (turbulent
flow)
coatings: nanopowders
gas lubrication &
materials
surface engineering,
hydrodynamics
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Other applications:
Subsea pumping & compression
High pressures & extreme temperatures
Subsea Engineering or SURF –
Subsea (trees, controls, manifolds, well connections, foundations, drillinginterfaces, host facility)
Umbilicals (static and dynamic umbilical sections providing comms,
power, chemicals)
Risers (dynamic through water column section of produced/injected fluidspipeline network)
Flowlines (static on-bottom section of produced/injected fluids pipeline
network)
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Tribology needs for the 2000’s
SUBSEA FLOOR FACTORYsystem design goal is flawless operation underwater for life of field/reserve
recovery
• Requires high degree of engineered components, specialty materials, high
cost installation
• Overall complexity, technical challenges, project size continues to grow
unrestrained into deeper water, harsher environments, higher
temperatures/pressures/harsher fluids
• Experienced engineering critical – long cycle time (field life ~20 yrs), high
degree of upfront uncertainty and high cost of mistakes, numerous complex
technical and commercial interfaces 7
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Largest power to weightratio,Compact & low # of parts
Reliability and efficiency,Low maintenance
Extreme temperature andpressure – multiple phases
Environmentally safe (lowemissions)
Lower lifecycle cost ($ kW)
High speed
Materials
Manufacturing
Processes & Cycles
Fuels
Rotordynamics &
(Oil-free) Bearings & Sealing
Coatings: surface conditioning for
low friction and wear
Ceramic rotors and components
Automated agile processes
Cost & number
Low-NOx combustors for liquid &
gas fuels
TH scaling (low Reynolds #)
Best if free (bio-fuels)
Turbomachinery needs:
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5
50
500
0.5
5000
10 100001000100
LiSO2 Battery
(BA5590)Solar Cell
Micro Solar Cell
SIZE (cm3)
P O W E R
D E N S I T Y ( M
W / m 3 )
Large ScaleCombustor
Micro Reactor
Micro-LithiumBattery
http://ubisa.kist.re.kr/Teams/ubisa/mems.htm
http://www.robhaz.com/
RescueRobot
http://www2.northerntool.c
om/product/448_448.htm
Portable Generator
http://www.notebookre
view.com/http://www.wir
efly.com/
Mobileelectronic
equipment
Large Scale
Combustor
http://www.uavpayloads.com/pr
oducts.php4
UAV
Micro Gas Turbine
http://www.m-dot.com/page8.html
Application of Meso/MEMS MTM
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Useful websites
NASA Oil-Free Turbomachinery Program http://www.grc.nasa.gov/WWW/Oilfree/
DOE http://www.eere.energy.gov/de/microturbines/
Capstone micro turbine http://www.capstoneturbine.com/
Mohawk Innovative Technology, Inc. http://www.miti.cc/
MIT Gas Turbine Lab. http://web.mit.edu/aeroastro/www/labs/GTL/
Read ppp: Microturbomachinery Applications
for more details