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CFD Study on dynamic stall for Darrieus self-starting turbines - Coggle…
CFD Study on dynamic stall for Darrieus self-starting turbines
Intro
Methods
Validation of TSR with previous study
Validation of dynamic stall occurences
Validation of coefficient plots
Dynamic stalls of interest (known ones)
DS Parameters to observe
Others
Coherent structure mixing rate
Leading edge suction parameter
Or a criteria at which separation occurs, try to find a 'generality'
Influence of dynamic stall vortices on downstream blades
chord-normal shear layer height
Instabilities
Kelvin-Helmholtz instability
Vortex shedding instability
Question: Are these separate instabilities, or are they in a sequence in the context of darrieus rotors?
boundary layer separation instability: Does this even exist?
Tool(s) / method(s) to use: Check weekly report no. 40
Windward dynamic stall
Separation locations
Flow detachment
Flow reattachment
Leeward dynamic stall
Separation locations
Flow detachment
Flow reattachment
cycle 4 and 5
Code to develop
Boundary layer velocity field + Cp
Vortex + separation+ instability detection
To develop: TVD + Flowfield data
Conclusions
Technical details
Methods
Turbulence models
Turbulence settings
Solver settings
Meshing
Type of grid (O-grid or U-grid)
2D or 3D
Algorithm
Boundary conditions
UDF
Post-processing
Reporting