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![Page 1: Automated Steady and Transient CFD Analysis of Flow … · Automated Steady and Transient CFD Analysis of Flow Over Complex Terrain for Risk Avoidance in Wind Turbine Micro-Siting](https://reader030.fdocuments.in/reader030/viewer/2022021505/5ac4d69d7f8b9af91c8d411c/html5/thumbnails/1.jpg)
Automated Steady and Transient CFD Analysis of Flow Over Complex Terrain for Risk Avoidance in Wind Turbine Micro-Siting
Global Flow Solutions, Vestas Wind Systems A/SGregory S. Oxley, Yavor V. Hristov, Seonghyeon Hahn, Cheng-Hu Hu, Søren Mogensen
[14 June 2011, Gregory S. Oxley, Global Flow Solutions, Vestas Wind Systems A/S]
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 20112
Presentation Outline
Background: Global Flow Solutions Why CFD for wind turbine micro-siting? 3 levels of CFD analysis
Part 1: Automatic Wind Park Simulator The process Step-by-step
Part 2: ”Forensic” transient analysis Detached-eddy simulation Mesoscale-microscale coupling
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 20113
Plant Siting & Forecast (formerly Wind & Site Competence Centre)
PSF is a shared resource focusing on development within:• New software and hardware tools• Uniform calculation methods and reporting• Sharing knowledge across borders• Siting and optimised production calculations• Wind resource measurements / risk assessment• Weather prediction
Staff ~ 30 specialists• CFD specialists• Meteorologists• Ph.D’s in mathematics / statistics / physics• Engineers / technicians• Application developers
Computational Resources• Jetstream - 1,344 cores• Firestorm - 12,222 cores
Vestas C. Europe
Vestas N. Europe
Vestas Pacific
Vestas China
VestasAmericas
Vestas Offshore
Vestas Med.
Plant Siting
& Forecast
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 20114
What if local wind effects are ignored?
Gear box may also have excessive loads due to wind turbulence
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 20115
Prevention is better than cure
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 20116
Automatic Wind Park Simulator – The BUTTON
EmailPointwise
Glyph 2 Script
OpenFOAMCase i
OpenFOAMCase i+1
OpenFOAMCase N
custom
PowerPoint & Excel Reports
Bash Script
custom
custom
Queuing System
Vestas Site Check
W&S engineerW&S engineer W&S engineer
Jetstream
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 20117
Vestas Site Check provides industrystandard wasp map contour file
wasp.map -> plot3d conversion and cut to turbine buffer distance
Terrain edge smoothing for even inlets and mesh extrusion considerations
Automatic Windpark SimulatorSteady, turbulent k-ε simulation
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 20118
Automatic Windpark SimulatorSteady, turbulent k-ε simulation
VestasFOAMfluent3DMeshToFoam
structured hyperbolic mesh extrusionin Pointwise with Glyph2 macro
utility used to generate hanging nodearchitecture
msh format → OpenFOAM format
unstructured meshing also available
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 20119
Automatic Windpark SimulatorSteady, turbulent k-ε simulation
customized from simpleFoam
standard ABL steady profiles
k-epsilon turbulence model with modified constants
customized inlet/outlet and terrainboundary conditions
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 201110
Automatic Windpark SimulatorSteady, turbulent k-ε simulation
automated reports (turbulence intensity, inflow angles, wind shear)
Vestas Site Check interface
statistical data for power forecasting
…
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 201111
Transient Analysis - Mesoscale – OpenFOAM couplingCase study: Japanese Wind Park
• blades damaged on 2 turbines on 2010-12-27
• suspected strong negative wind shear
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 201112
Mesoscale – OpenFOAM couplingCase study: Japanese Wind Park
WRF LES simulation at 111 m horizontal resolution
initialized with GFS
model topography at 1 km resolution
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13
ALARM ALARM
Mesoscale – OpenFOAM couplingCase study: Japanese Wind Park
6th OpenFOAM Workshop, Penn State, USA, 14 June, 2011
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 201114
Mesoscale – OpenFOAM couplingCase study: Japanese Wind Park
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6th OpenFOAM Workshop, Penn State, USA, 14 June, 201115
Summary
Switching to OpenFOAM makes sense: Access to source code Research community involvement Flexibilty Publishable …
Levels of Support: Steady analysis DES forensic analysis Forest modeling
Advanced applications : Dynamically coupled Mesoscale – OpenFOAM for 1hr period of interest
The future has many possibilities!
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