srm suite webinar
TRANSCRIPT
we are cmcl innovations
about us
• Engineering software
• Technical consulting
• Collaborative R&D
• Training and teaching
Our modelling philosophy
Models represent our state-of-the-art “knowledge” of the universe
optimisation
application models
data modelsmodel
srm suite... realise deeper insight faster
typical challenges for our customers
Combustion
Knock, misfire, ignition, low temperature
combustion
Modern techniques
Boosting, Exhaust gas residuals,
Multiple direct injection
Emissions
CO, uHCs, Nox,soot particle dynamics
(including number density
and composition)
Fuels
Alternative fuelsFuel developmentFuel reformation
In-cylinder processes are far more than just fluid dynamics....chemistry must also be considered
why our customers choose srm suite
– Emissions
– Predictive combustion
– Critical in-homogeneities (vs. 1D)
– Amenable time scales (vs. CFD)
– Opportunity for design optimisations
– Seamless coupling with 3rd party industry standard tools
– Our tools make it simple
Benefits
srm suite...realise deeper insight faster
Some of our success stories
Design optimisation – Indian OEM, minimising emissions, maximising efficiency
Fuel development – Major Oil Company, detailed fuel models for future engine operating modes
Piston design – Leading truck manufacturer, minimising emissions through intelligent piston bowl design
Transients – International OEM, optimising strategies for transient operating mode changes
examples
CIDI
Advanced combustion
Emissions
CIDI
-80 -60 -40 -20 0 20 40 60 80
0
1
2
3
4
5
6
7
8
9
In jections advance
SO I=-53 C AD ATD C
SO I=-46 C AD ATD C
SO I=-41 C AD ATD C
SO I=-38 C AD ATD C
In-c
ylin
de
r p
res
su
re (
Mp
a)
CAD
-100 -80 -60 -40 -20 0 20 40 60 80 100
0
1
2
3
4
5
6
7
8
9
In-c
ylin
de
r p
res
su
re (
Mp
a)
C AD
Experim ent
p t1 SO I=-53 ATD C
pt2 SO I=-46 ATD C
pt3 SO I=-41 ATD C
pt4 SO I=-38 ATD C
early DI diesel engine: injection timing sweep
500 550 600 650 700 750 800 850 900 950 1000
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Open bowl shape
Eq
uiv
ale
nc
e r
ati
o
Temperature (K)
CAD=-20 CAD ATDC
CAD=-10 CAD ATDC
CAD= -5 CAD ATDC
500 550 600 650 700 750 800 850 900 950 1000
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Re-entry bowl shapeE
qu
iva
len
ce
ra
tio
Temperature (K)
CAD=-20 CAD ATDC
CAD=-10 CAD ATDC
CAD= -5 CAD ATDC
500 550 600 650 700 750 800 850 900 950 1000
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Vertical side wall bowl
CAD=-20 CAD ATDC
CAD=-10 CAD ATDC
CAD= -5 CAD ATDC
Eq
uiv
ale
nc
e r
ati
o
Temperature (K)
Open
Re-entry
Vertical
mixture preparation insight
advanced combustion
Effect of charge stratification on max. pressure rise rates
Int. J. Eng. Res., Mar. 2007
Int. J. Engine Res., 8, 41-50, 2007
Local history of temperature and composition vs global averages
CAI (gasoline HCCI)
JSAE 20077195
JSAE 20077195
optimal dual injection PCCI (diesel HCCI)
800
1000
1200
1400
1600
1800
-40 -30 -20 -10 0 10 20 30 40
cycle 55
cycle 56
cycle 57
cycle 58
cycle 59
cycle 60
cycle 61
cycle 62
cycle 63
cycle 64
cycle 65
T (
K)
C A D
Partial Burn
KnockMisfire
Indicated thermal efficiency (%)
SAE Paper 2005-01-0161
HCCI operating window
emissions
Euro V, NOx = 2000 mg/kWh
Euro V = 0.46 g/kWh
Multiple steady state operating points
Scania turbocharged truck engine
uHCs and NOx
Influence of fuel blending on CO emissions
• Sub Particles: 3172
• No. Carbon atoms: 4.967x106
• Surface Area: 2.345x10-10 cm2
• Shape Descriptor: 0.768
• Radius of Gyration: 44.384 nm
• Age: 0.0917 s
3D soot aggregates
Experiment Simulation
aggregate size distribution
srm suite....realise deeper insight faster
Now you can use next-generation engine modelling tools
to solve your technical problems.
Please talk to us about your requirements...
srm suite v6.1 available now.