Combustion Modeling using Ansys CFD - asge-national.org

1 1 2016 Ansys , 2, 2016 Ansys Confidentia lCombustion Modeling using AnsysCFDN avraj Hanspal, Stefano Orsino& Ahmad HaidariAnsysInc, Canonsburg, 2016 Ansys , 2, 2016 Ansys Confidentia l Ansys &KeyTechnologies SimulationDrivenProductDevelopment WhatisCFD? ANSYSFLUENT ANSYSS olutions CombustionModeling DPM&SprayModeling Pollutant/EmissionsModeling ApplicationTestCase(s) Summary&DemoAgenda3 2016 Ansys , 2, 2016 Ansys Confidentia l*BusinessWeek, FORTUNE Ansys -Simulation Leader FOCUSEDThis is all we product technologies in all physics areasLargest development team focused on simulationCAPABLE2,700+ 75 40 employeeslocationscountriesTRUSTEDFORTUN E 500 Industrials 96 of the top 100 ISO 9001 and NQA-1 certifiedPROVENR ecognized as one of the world s MOST INNOVATIVE AND FASTEST-GROWING COMPANIES*INDEPENDENTLong-term financial stabilityCAD agnosticLARGEST3xThe size of our nearest competitor4 2016 Ansys , 2, 2016 Ansys Confidentia l45.

2 000+CUSTOMERSGLOBALLYF luidsStructuresElectromagneticsThermalPo wer IntegritySystemsEmbedded SoftwareLeading DisciplinesAutomotiveAerospace & DefenseAcademicConstructionConsumer GoodsElectronicsEnergyHealthcareIndustri al Rotating MachineryMaterials &Chemical ProcessingSemiconductorsIndustry PresenceOur Industry Reach and Solution Offerings1,300+680+800+PEOPLEG lobal Reach2,000+ FROM CHANNEL PARTNERS5 2016 Ansys , 2, 2016 Ansys Confidentia lBreadth of TechnologiesStructural Mechanics:From Linear Statics Fluid Mechanics: From Single-Phase Flows Electromagnetics: From Low-Frequency WindingsSystems:From Data SharingTo High-Speed ImpactTo Multiphase CombustionTo High-Frequency Field AnalysisTo Multi-Domain System Analysis6 2016 Ansys , 2, 2016 Ansys Confidentia lOur Vision.

3 Simulation Driven Product DevelopmentConceptPhysicalPrototypeProdu ctionSimulation-DrivenProduct DevelopmentDetailed Design7 2016 Ansys , 2, 2016 Ansys Confidentia lStreamlined Workflow StrategyWorkbench End-To-End Solutions In a Unified Environment8 2016 Ansys , 2, 2016 Ansys Confidentia lANSYS, Technologies Ansys design, develops, markets and globally supports a comprehensive range of engineering simulation software Proven software technologies for Fluid Dynamics (FLUENT, CFX) for CFD Structural Mechanics Acoustics Electromagnetics Multiphysics Specialized tools, including Ansys Icepak (thermal/flow for electronics) Ansys nCode DesignLife (for fatigue)EmagAcousticsStructuralCADI mportParametric SimulationDesign ExplorationMeshingPost-processingFluid10 2016 Ansys , 2, 2016 Ansys Confidentia lAdvanced CFD DesignXplorerMeshingMechanicalDesignMode lerANSYS WorkbenchANSYS WorkbenchA common environment integrating Ansys tools for multi-disciplinary CAE simulation11 2016 Ansys , 2, 2016 Ansys Confidentia lWhat is CFD?

4 Flow simulation, or Computational Fluid Dynamics(CFD), is the science of predicting fluid flow, heat transfer, mass transfer, chemical reactions, and related phenomena by solving the mathematical equations (normally PDE s) Three Step and and analysisGeometry and MeshingResults Analysis12 2016 Ansys , 2, 2016 Ansys Confidentia lComputational Fluid Dynamics (CFD) Fluid mechanics that uses numerical methods and algorithms Solve, analyze problems that involve fluid flows Flow characteristics Heat and mass transfer Chemical reactions, etc. Fundamental basis Solves Navier-Stokes Equations, numerically To conserve mass, momentum, energy, species Ansys CFD solvers based on Finite Volume MethodExptSim13 2016 Ansys , 2, 2016 Ansys Confidentia lANSYS FluentWidest array of Modeling capabilitiesAccurate capabilities to simulate a wide range of phenomena.

5 Aerodynamics, combustions, hydrodynamics, mixtures of liquids/solids/gas, particles dispersionsCustomizable numerical modelsCustomizable to extend the capabilities to your specific CFD needs, and include your "secret ingredients" like material properties, simulation models, solver speed and HPC scalabilityA fast solver: industry-leading multi-processor solver technologies ensure that you get the fastest time to solutionFluidsCourtesy Speedo Courtesy Dyson Ltd. Courtesy Astec, 2016 Ansys , 2, 2016 Ansys Confidentia lConsolidated Tools for CAD, Geometry, Meshing &Post-ProcessingIntegration in Ansys Workbench Flexible Workflows Connect to other Simulation tools for Multi-Physics Analysis Parameterization for OptimizationANSYS FLUENT WorkflowFLUENTS etup/Solve/PostDesignModelerOr SpaceClaimANSYS MeshingPlatformCFD-PostANSYS WorkbenchANSYS CAD Plug-inCAD SystemGeometry MeshingPost-ProcessingSetupSolveCADG eometry CADM eshingSetupSolvePost-Processing15 2016 Ansys , 2.

6 2016 Ansys Confidentia lModelingFlow Physics in FLUENT16 2016 Ansys , 2, 2016 Ansys Confidentia lCFD MethodologyProblem Identification Define goals Identify domainPre-Processing Geometry Mesh Physics Solver SettingsSolve Compute solutionPost Processing Examine resultsUpdate ModelGasGasDomain of interestRiserSolids volume fraction contours (5 micronparticles)Courtesy: Fuller CompanyCyclone17 2016 Ansys , 2, 2016 Ansys Confidentia lMotivation for Modeling Reacting Flow Devices are very complex Complex geometry, complex BCs, complex physics ( turbulence , multi-phase, chemistry, radiation.)

7 , complex systems, .. Tool to gain insight and understanding Predictions of flow field and mixing characteristics Temperature field Species concentrations Particulates and pollutants Reduce expensive experiments Eventually design!18 2016 Ansys , 2, 2016 Ansys Confidentia lReacting Flow ApplicationsANSYS CFD contains models which are applicable to a wide range of homogeneous and heterogeneous reacting flows Furnaces Boilers Process heaters Gas turbines Rocket engines IC engine CVD, catalytic reactionsImportance More Efficient (Energy Efficiency) Cleaner (Pollutant Regulations) Safer (Safety Regulations)

8 Environment & Emissions controlPropulsion & EnginesMicros & NanosBiomedicine &BiochemistryClimate change & Energy sustainabilityFire & Fire protectionBurnersBoilersIC EnginesFired HeatersGas FlaresGas Turbine Combustors19 2016 Ansys , 2, 2016 Ansys Confidentia lKey Results using Ansys SpaceClaimDirect Modeler, the model was ready for meshing and simulation in only four hours. Engineers increased primary air entrainment from 36 percent to 52 percent. This generated a stable flame with nearly complete Combustion , high levels of efficiency and low levels of carbon in Action Whirlpool chose Ansys SpaceClaimDirect Modeler, which enables easy geometry cleanup and generation of closed volumes required for CFD.

9 Engineers then used Ansys Fluent to perform Combustion simulation using the EDC Combustion and SST turbulence Reduced Burner model Prep Time by 90 percent with Ansys SpaceClaimNew-GenerationDesigning a Better Burner Whirlpool Brazil relies heavily on simulation to design gas burners for freestanding ranges, built-in ovens and cooktops. Engineers required a tool to prepare models for simulation so that they could quickly explore a range of designs to come up with the best burner that would meet all design time by 35%Reduced time to analysis by 90% This application demonstrates the time-and cost-savings that can be achieved by enabling simulation engineers to quickly and easily prepare design geometry for simulation, as well as how an efficient design can be determined using simulation.

10 Pablo FilgueiraRodeiroSenior Manager Simulation-Based DesignWhirlpool Corporation20 2016 Ansys , 2, 2016 Ansys Confidentia lCFD Models involved in Reacting FlowsCombustionApplicationsTurbulence ModelingPollution ModelingRadiationModelingCombustion ModelingModelingMultiphase Flows21 2016 Ansys , 2, 2016 Ansys Confidentia lRole of turbulence in Reacting System Flows encountered in most of the Practical Reacting Systems are turbulent Reactions and turbulence affect each other turbulence -chemistry interaction turbulence is modified by flames Through flow acceleration, modified kinematic viscosity Modified turbulence alters the flame structure Enhanced mixing and chemical reactions (through temp fluctuations) Mixing time scale ( F) relative to chemical time scale ( chem) An important parameter to decide whether the reaction is mixing limited or chemically limited Mixing time scale in turbulent flows = DamkohlerNumber (Da) = If Da> 1 Fast chemistry and Da 1 Finite rate chemistry22 2016 Ansys , 2, 2016 Ansys Confidentia lModeling Examples.