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Engineering ServicesEngineering Services
Examples of Powertrain WorkExamples of Powertrain Work
Piston CoolingPiston Cooling
Steady State Steady State PortflowPortflow
Exhaust system CHTExhaust system CHT
SCR AfterSCR After--TreatmentTreatment
Piston CoolingPiston Cooling
Co-Simulated Fluid-Solid domains
Solid Piston Model
Fluid Model
Cycle-
averaged HTC & Tfluid
Twall
Oil
Transient multiphase mixture of oil and crankcase gas.
Steady-state solid conduction
Piston motion modeled using Rigid Body Motion and Mesh Morphing.
See animation on site
SteadySteady--State Port FlowState Port Flow
•Predict discharge coefficient versus valve lift•Swirl & tumble coefficients•Sequence of steady-state simulations•Robust geometry and grid creation •Detailed mesh controls and embedded refinement•Fine near wall resolution•Stable prediction of turbulence•Automation –
a “virtual test rig”See animation on site
•• Demonstrated accuracy:Demonstrated accuracy:•• Diesel / gasolineDiesel / gasoline•• 4 valve / 2 valve4 valve / 2 valve•• Intake / ExhaustIntake / Exhaust
•• Automation: CAD to PowerPoint Report (with multiple lifts) in a Automation: CAD to PowerPoint Report (with multiple lifts) in a single jobsingle job•• Custom Tools currently in production use at many OEMsCustom Tools currently in production use at many OEMs•• Virtual Test Rig corresponds to physical testVirtual Test Rig corresponds to physical test
SteadySteady--State Port FlowState Port Flow
AutomationAutomation••STARSTAR--CCM+ PortCCM+ Port--Flow Custom Tool runs intake and exhaust port Flow Custom Tool runs intake and exhaust port virtual tests directly from your STARvirtual tests directly from your STAR--CCM+ Installation.CCM+ Installation.
Increased productivity Stabilizing established Best Practice enterprise-wide Imbedded company-specific expertise Error reduction/capturingIncreased access to 3D analysis in a design setting Access to Optimization Repeatability
SteadySteady--State Port FlowState Port Flow
0 20 40 60 80 100 120 140 160time (s )
Exhaust Manifold
Turbine Housing
Turbine Wheel
Goose-Neck Inner
Goose-Neck Outer
CAT Casing
CAT Insulation
CAT DS Cone Inner
CAT DS Cone Outer
Outlet Flange
FLUID - Manifold Inlets (average)
FLUID - CAT Inlet
FLUID - CAT Outlet
•• KeyKey--On event for comparisons of front end exhaust On event for comparisons of front end exhaust systemssystems
•• CoCo--simulated STARsimulated STAR--CCM+ models for fluid and solid CCM+ models for fluid and solid domainsdomains
Exhaust System CHTExhaust System CHT
See animation on site
See animation on site
CapabilitiesCapabilities•• Evaluate the efficiency of Evaluate the efficiency of NOxNOx reduction in the catalyst reduction in the catalyst •• LagrangianLagrangian multiphase with transient pulsed spray injectionmultiphase with transient pulsed spray injection•• MultiMulti--component droplets (water/urea mixture)component droplets (water/urea mixture)•• CHT (multiCHT (multi--phase fluid + solid pipe walls and mixers)phase fluid + solid pipe walls and mixers)•• Liquid film + droplet/film wall interactionLiquid film + droplet/film wall interaction•• Droplet/film evaporation + gas mixing (air, Urea gas, NH3, H2ODroplet/film evaporation + gas mixing (air, Urea gas, NH3, H2O……))•• Chemical reactions (Chemical reactions (ThermolysisThermolysis/Hydrolysis)/Hydrolysis)•• Porous MediaPorous Media
DOC(Diesel Oxidation Catalyst)
Spray Injector
SCR
DPF(Discrete Particle Filter)
Mixers
Flow outlet
Flow inlet
SCR AfterSCR After--TreatmentTreatment
•• STARSTAR--CCM+ has all the physical models required to model SCR systemsCCM+ has all the physical models required to model SCR systems•• Prediction of ammonia uniformity for efficient Prediction of ammonia uniformity for efficient NoxNox reductionreduction
•• Predict trends with operating conditionPredict trends with operating condition•• Rank designs Rank designs
•• Detailed calibrationDetailed calibration•• ReactionsReactions•• Droplet/wall interactionDroplet/wall interaction
SCR After TreatmentSCR After Treatment
See animation on site
See animation on site
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