SAME: climatizzazione di un trattore agricolo
Transcript
SAME: climatizzazione di un trattore agricolo
ANSYS CFD MODULES Outline • ANSYS CFD Suite – Modules & Structure – ANSYS Meshing for CFD @V17 – ANSYS CFD Professional – ANSYS CFD Flo – ANSYS CFX – ANSYS FLUENT – ANSYS CFX/FLUENT/CFD extra capabilities – Bundled & unbundled solutions – Other CFD related product • ANSYS CFD Professional - live demo Geometry preparation SPACE CLAIM - Direct Modeling – – – Extreme ease of use Excellent for non CAD users Ease of use to create model from scratch DESIGN MODELER - Feature-Based Modeling – – – Persistent: usage history captured Associative: can utilize parameters and attributes defined in the major CAD systems Strong solid modeling capabilities Geometry Interfaces @R17 4 Geometry Interfaces @R17 5 ANSYS CFD Products - Meshing Modules ANSYS MESHING GENERAL PURPOSE TURBO Workbench Meshing ICEM CFD Fluent Meshing Auomatic Persistent Mutliphisic Advanced mesh editing Fully hex meshing Advanced mesh editing Geometry wrapping ANSYS TURBOGRID Turbo mesh • • automatic template based Feedback From Customers Across Various Industries Areas Of Improvements • Workflow Pervasiveness • Integrated Geometry Meshing Solutions • Assembly, Part Management • CAD and Mesh Manipulation Tools • Solver Checks @ The Pre Processing Stage ITS ALL ABOUT THE PROCESS/WORKFLOW User Efforts Key Steps Job submit, monitor,.. ANSYS CFD Products – Pre, Solver, Post modules ANSYS CFD ANSYS CFD Professional ANSYS CFD-Flo ANSYS CFX ANSYS FLUENT Basic fluid flow and heat transfer Fluid flow, heat transfer, cavitation, … Advanced fluid flow and heat transfer Advanced fluid flow and heat transfer Increasing simulation capabilities ANSYS CFD Professional Basic tool for entry level users, accessed through the powerful cfx engine Temperature mixing Analyses type allowed • Steady analyses • Uncompressible flows • One-phase flows • Convective heat transfer • Conjugate heat Transfer Suitable for • Mono-phase valves, pipe connections and junctions • Heat exchangers (no phase change) • Mass flow split calculations • Pressure drops calculations • Temperature mixing Account for • HPC usage • What if / optimization / Six Sigma analyses Limitations • Constant property materials • K-ᖡ turbulence model only Valve ANSYS CFD Flo Intermediate tool for beginners engineers as well as expert users. It is a sub-group of ability inside ANSYS CFX Analyses type allowed • Steady/Unsteady analyses • Compressible/Uncompressible flow • One-phase flows • Multi-phase allowed only for cavitation and free surface flows • Convective, conjugate and radiation (*) heat transfer • Deforming mesh • Turbulence models extension (SST, anisotropic RSM) • FSI Suitable for • Cavitating valves, Heat exchangers • Mass flow split and pressure drop calculations • Vortex Shedding, Aeroacustic (*), … Limitations • Rotating machinery, full radiation models, full multiphase models, combustion (*) limited set of features capabilities Low Temperature Heat Exchanger ANSYS CFX Full featured CFD tool Analyses type allowed • Steady/Unsteady analyses • Compressible/Uncompressible flow • Lagrangian and Eulerian multiphase flows • Convective, conjugate and radiation heat transfer • Full turbulence models extension • Combustion • FSI • Rotating Domain (turbomachinery) • Aeroacustic capabilities (*) • Extra embedded capabilities/modules (see next slides) Suitable for • Every scenario where cfd can help and can be applied to Courtesy of Valeo Sylvania (*) limited set of features capabilities ANSYS CFX EXTRA CAPABILITIES Turbo Pre-Processing • Transient Blade Row • Ability to use time domain and/or frequency domain transformation to model few blade passages wit the same accuracy of the full machine • Blade Flutter • Complemented blade flutter analysis with ability to export complex pressures from transient flo simulation or load application in ANSYS Mechanical Compressor’s blade flutter ANSYS FLUENT Full featured CFD tool Analyses type allowed • Steady/Unsteady analyses • Compressible/Uncompressible flow • Lagrangian and Eulerian multiphase flows • Convective, conjugate and radiation heat transfer • Full turbulence models extension • Combustion • FSI • Full aeroacustic capabilities • Extra embedded capabilities/modules (see next slides) Suitable for • Every scenario where cfd can help and can be applied to Courtesy Dallara Automobili ANSYS FLUENT EXTRA CAPABILITIES Adjoint Solver • • • • • An efficient means of exploring a design space Understanding the most significant influences on a system in single computation A powerful gradient based shape optimization tool Computes input parameters sensitivity to guide design modification Includes Bernstein polynomial based mesh morphing technology Three Shape Parameters 1. Backlight angle (T1) 2. Tumble home angle (T2) 3. Windshield angle (T3) ANSYS CFD EXTRA CAPABILITIES 6 Degrees Of Freedom • Rigid Body solver • Implicit coupling with stagger iteration • Support CCL • Robust and easy-to-use motion prediction • Available with • ANSYS CFD Flo • ANSYS CFX • ANSYS FLUENT ANSYS CFD EXTRA CAPABILITIES - AEROACUSTIC CFD Approaches to Aeroacoustics Direct calculation – Computational Aeroacoustics (CAA) 2. Coupled CFD with specialized acoustics code, Boundary Element Methods (BEM), Hybrid zonal methods 3. Acoustic wave are not tracked with CFD solution Use special acoustics codes to calculate the wave propagation Acoustic Analogy modeling 4. Resolve the acoustic pressure fluctuations as part of the CFD solution Use CFD to calculate source field Use analytical solution to propagate sound from source to receiver location Decreasing computational effort 1. Steady RANS based noise source modeling Use empirical correlations to estimate acoustic 2. 3. 4. radiation based on mean1. flow solutions ANSYS CFX Y Y N (*) ANSYS FLUENT Y Y Y Y (*) fan noise macro & ccl ANSYS CFD EXTRA CAPABILITIES – MULTIPHYSICS FSI ANSYS strives to allow you to predict accurately the performance of products when this performance is impacted by interactions between different physics Other CFD related Products ANSYS ICEPAK ANSYS BLADE MODELER ANSYS Vista TF Fluent-based tool for robust and powerful CFD analyses for electronics thermal managment Specialized easy-to-use tool for rapid 3D design of bladed rotating and stationary machinery components Rapid preliminary optimization of turbomachinery designs based on 2D through flow analysis Other CFD related Products – Reaction Design – CHEMKIN-PRO - chemical kinetics simulation ͻ Si concentra sulla chimica del problema utilizzando sistemi ideali per descrivere i flussi di reagenti e prodotti – CHEMKIN-CFD - kinetics solver plug-in ͻ Permette l’utilizzo della tecnologia CHEMKIN-PRO in campo CFD – CHEMKIN-PRO REACTION WORKBENCH ͻ Fornisce una piattaforma aggiuntiva per lo studio e l’analisi dei combustibili – Compara, unisce ed estrae i meccanismi di reazione – Determina la miglior composizione di miscele combustibili assegnando dei target di proprietà – Add-on di CHEMKIN-PRO – ENERGICO™ - fast continuous-flow emissions simulations ͻ Automatizza la creazione di ERN (Equivalents Reactor Networks) e la mappatura dei risultati sulla geometria di partenza – FORTÉ™ - CFD for IC Engine Designers ͻ Workflow specifico per simulazioni di motori a combustione – – – – Generazione automatica di mesh Chimica dei fuel e di reazione accurata Modelli di Spray e Spray-Wall Rapidità di soluzione 19 FENSAP-ICE Flow solution Modular system leading to full In-Flight ice accretion simulations Eulerian droplet impingement study Ice accretion simulation Several fields of application, as: icing studies and certification for aircrafts, helicopters, jet engines and also for wind turbines 20