XFlow培训讲稿无网格 CFD技术应用培训教程2
风力发电机
学习改变命运,知 识创造未来
2021年2月22日星期一
•Overview
• Energy • Single phase • External aerodynamics • Force motion • Constained motion • Post-processing
学习改变命运,知 识创造未来
•WS02 – Wind turbine
XFlow培训讲稿无网格CFD技术应用培训教程2风力发电机
•1. Environment: Single phase external
•Engine: • Dimension: 3D • Single phase external • Thermal model: Isothermal • Acoustic analysis: off
XFlow培训讲稿无网格CFD技术应用培训教程2风力发电机
•1. Environment: Inlet velocity profile
•WS02 – Wind turbine
•Rightclick
学习改变命运,知 识创造未来
XFlow培训讲稿无网格CFD技术应用培训教程2风力发电机
•1. Environment: Disable the grid
•Disable the grid: • Hit the “Preferences” button • Uncheck “Show grid” • Hit “Set”
•WS02 – Wind turbine
学习改变命运,知 识创造未来
XFlow培训讲稿无网格CFD技术应用培训教程2风力发电机
•2. Materials: Air
•WS02 – Wind turbine
•Global attributes: • Automatic turbulence model • Wind-tunnel • No gravity laws • Initialization field: Auto
学习改变命运,知 识创造未来
•Wind tunnel: • Dimensions: (500,200,200) • Position: (75,25,0) • Ground wall: On • Velocity laws: 10((y+75)/50)^0.143 m/s
•Fluid: • Air by default • Thermodynamic properties • Viscosity model: Newtonian
•WS02 – Wind turbine
学习改变命运,知 识创造未来
XFlow培训讲稿无网格CFD技术应用培训教程2风力发电机
•3. Geometry: Import the geometries
•Import geometries: • Hit the button • Browse the file
•* Axis X: [ 0 , 47.9865 ] Size: 47.9865 •* Axis Y: [ -76.921 , 5.01771 ] Size: 81.9387 •* Axis Z: [ 5.01771 , 5.01771 ] Size: 10.0354
•Time discretization: • Simulation time: 10s • Automatic time step calculation • Courant number: 1
•Data storage: • Folder name • Frequency of samples: 20Hz
[x]
• Forced
[]
学习改变命运,知 识创造未来
•Solid properties: • Mass: 1000 kg
•Degrees of Freedom: • Rotation in X-axis
XFlow培训讲稿无网格CFD技术应用培训教程2风力发电机
•4. Simulation: Set the numerical parameters
•3. Geometry: Check the forced motion
•WS02 – Wind turbine
•Visualize the forced motion: • Play forward the frames • Visualize the blade rotating
学习改变命运,知 识创造未来
[]
• Constrained
[]
• Forced
[x]
•WS02 – Wind turbine
•Blades: • Position laws: (0,0,0) • Euler angles • Angular laws: (90*t,0,0)
学习改变命运,知 识创造未来
XFlow培训讲稿无网格CFD技术应用培训教程2风力发电机
•WS02 – Wind turbine
•Resolution: • Resolved scale: 8m • Refinement: walls + wake • Wake resolution: 0.05m • Wall resolution: 0.05m • Wake refinement threshold: 1e-05
学习改变命运,知 识创造未来
•WS02 – Wind turbine
XFlow培训讲稿无网格CFD技术应用培训教程2风力发电机
•3. Geometry: Set the forced motion
•Tower:
• Fixed
[x]
• Constrained
[]
• Forced
[]
•Blades:
• Fixed
XFlow培训讲稿无网格CFD技术应用培训教程2风力发电机
•3. Geometry: Set the constrained motion
•Tower:
• Fixed
[x]
• Constrained
[]
• Forced
[]
•WS02 – Wind turbine
•Blades:
• Fixed
[]
• ConstLeabharlann ained学习改变命运,知 识创造未来
XFlow培训讲稿无网格CFD技术应用培训教程2风力发电机