Wind and Drivetrain Applications using SIMULIA XFlow … · OM s | 8 f 7 Wind and Drivetrain...
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Transcript of Wind and Drivetrain Applications using SIMULIA XFlow … · OM s | 8 f 7 Wind and Drivetrain...
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Wind and Drivetrain Applicationsusing SIMULIA XFlow LBM
Zaki AbizaXFlow Business Development
4th Wind and Drivetrain ConferenceHamburg, April 19th 2018
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Introduction
Numerical Methodology
Wind Turbine Aerodynamics
Drivetrain Lubrication
Offshore Wind Turbines
Content
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Introduction
Numerical Methodology
Wind Turbine Aerodynamics
Drivetrain Lubrication
Offshore Wind Turbines
Content
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SIMULIA CFD Strategy
Fidelity
Sim
ulat
ion
valu
e
Steady state &Low unsteady flow
High fidelity
SIMULIA Navier-Stokes
SIMULIA Lattice-Boltzmann
LBM for simulations beyond physical tests
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Introduction
Numerical Methodology
Wind Turbine Aerodynamics
Drivetrain Lubrication
Offshore Wind Turbines
Content
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Lattice-Boltzmann Method
Numerical Scheme
Macroscopic variables are statistical moments of the particle distribution function (f)
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Density
Linear momentum
f = f (x,v,t)
27 velocity directions in 3D
Structure D3Q27
Collision operatorwith a unique XFlow collision
operator in central moments spaceParticles streaming
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Lattice Structure
Discretization Scheme
Set of 27 PDF at each lattice nodes, Data stored in Octree structure
Generated based on input resolved scale and geometries
Supports multi-resolution
Adaptive & dynamic refinement: wake, moving parts, free surface interface
Wake = 0.01 m
Far Field = 1.28 m
Walls = 0.005 m
Lattice structure illustration
Far field scale = hNear walls scale = h/4
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Turbulence ModelLarge-Eddy simulation (LES)
Turbulence modeling: Wall-Modelled LES (WMLES)
Boundary layer modeling: generalized law of the wall
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Introduction
Numerical Methodology
Wind Turbine Aerodynamics
Drivetrain Lubrication
Offshore Wind Turbines
Content
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Wind Turbine DynamicsReal rotating blades at real scale Wake adaptive refinement
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Flow interaction between different wind turbines
Wind Turbines Field
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Vertical Axis Wind Turbines (VAWT)VAWT starting characteristics
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Parts breaking and trajectory
Parts Separation
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Parts SeparationIce detachment and trajectory
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Introduction
Numerical Methodology
Wind Turbine Aerodynamics
Drivetrain Lubrication
Offshore Wind Turbines
Content
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3-gear elements drivetrain
Drivetrain Lubrication
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Drivetrain LubricationChain driven gears
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Simple Gear LubricationDrivetrain lubrication and thermal analysis
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Introduction
Numerical Methodology
Wind Turbine Aerodynamics
Drivetrain Lubrication
Offshore Wind Turbines
Content
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Offshore Wind Turbine TowerCase study: Wind effect on the flow around an offshore wind turbine tower
Water level at Y = 0 m
Submerged part: 60 m
Water velocity: 10 [m/s] for Y < 0 m
Wind velocity: 20 [m/s] for Y > 0 m
3 configurations:
1. Free Surface flow: no wind, only water
2. Multiphase flow: water and fixed wind
3. Multiphase flow: water and wind sweepVelocity law:
X: 20*cos(ω*t) [m/s]
Y: 0 [m/s]
Z: 20*sin(ω*t) [m/s]
60
m
13
8 m
Water surface
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Offshore Wind Turbine TowerCase study: Wind effect on the flow around an offshore wind turbine tower
Water level at Y = 0 m
Submerged part: 60 m
Water velocity: 10 [m/s] for Y < 0 m
Wind velocity: 20 [m/s] for Y > 0 m
3 configurations:
1. Free Surface flow: no wind, only water
2. Multiphase flow: water and fixed wind
3. Multiphase flow: water and wind sweepVelocity law:
X: 20*cos(ω*t) [m/s]
Y: 0 [m/s]
Z: 20*sin(ω*t) [m/s]
Water velocity
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Free-surface flow: No wind effect, only water simulated
Offshore Wind Turbine Tower
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Offshore Wind Turbine TowerCase study: Wind effect on the flow around an offshore wind turbine tower
Water level at Y = 0 m
Submerged part: 60 m
Water velocity: 10 [m/s] for Y < 0 m
Wind velocity: 20 [m/s] for Y > 0 m
3 configurations:
1. Free Surface flow: no wind, only water
2. Multiphase flow: water and fixed wind
3. Multiphase flow: water and wind sweepVelocity law:
X: 20*cos(ω*t) [m/s]
Y: 0 [m/s]
Z: 20*sin(ω*t) [m/s]
Wind velocity
Water velocity
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Offshore Wind Turbine TowerMultiphase flow: Effect of the wind on the free-surface of water
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Offshore Wind Turbine TowerFree-surface flow Multiphase flow
More perturbations on water surface with multiphase flow
Lower frontal water elevation with multiphase flow
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Offshore Wind Turbine TowerCase study: Wind effect on the flow around an offshore wind turbine tower
Water level at Y = 0 m
Submerged part: 60 m
Water velocity: 10 [m/s] for Y < 0 m
Wind velocity: 20 [m/s] for Y > 0 m
3 configurations:
1. Free Surface flow: no wind, only water
2. Multiphase flow: water and fixed wind
3. Multiphase flow: water and wind sweepVelocity law:
X: 20*cos(ω*t) [m/s]
Y: 0 [m/s]
Z: 20*sin(ω*t) [m/s]
Wind sweep
Water velocity
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Offshore Wind Turbine TowerMultiphase flow: Wind direction effect on the water wake
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The main wind and drivetrain applications of SIMULIA XFlow:
Wind Turbine Aerodynamics
Drivetrain Lubrication
Offshore Wind Turbines
Summary
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Zaki AbizaXFlow Business Development
Danke!