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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