Table of Contents

VortexLine coming soon

https://bladednextgen.dnv.com/schema/0.4.1/Settings/AerodynamicSettings/AerodynamicModel/VortexLine.json

Not supported yet

The Vortex Line aerodynamic model.

  • AerodynamicModelType: string = VortexLine
  • SequentialTimestepAdaptation: object (SequentialTimestepAdaptation)
  • MaximumNumberofFreeWakeSteps: integer
  • MaximumNumberofWakeSteps: integer
  • NumberOfThreads: integer
  • VortexWakeTimeStep: number (s)
  • WakeType: string = FreeWake | FixedWake
  • CoreGrowthModel: string = RL_Model | LO_Model | Fixed
  • InitialVortexCoreSizeModel: string = RL_Model | LO_Model | Fixed
  • FilamentStrain: boolean
  • LambOseenCoreGrowthConstant: number
  • CoreGrowthConstant: number
  • RamasamyLeishmanConstant: number

A type of AerodynamicModel

Properties

SequentialTimestepAdaptation: object(SequentialTimestepAdaptation), optionalcoming soon

Parameters for the Sequential Timestep Adaptation (STA) technique.

AerodynamicModelType: stringcoming soon

Defines the specific type of AerodynamicModel model in use. For a VortexLine object, this must always be set to a value of VortexLine.

MaximumNumberofFreeWakeSteps: integer, optionalcoming soon

Each free wake node that is emitted from the trailing edge will be allowed a maximum number of free wake steps after it will be no longer considered in the free wake solution and convected with local wind speed and last computed induction.

default = 200

MaximumNumberofWakeSteps: integer, optionalcoming soon

Each wake node will be allowed a maximum number of steps before it is removed. This option puts an upper bound on the number of wake nodes.

default = 10000

NumberOfThreads: integer, optionalcoming soon

The number of parallel CPU threads used in evaluation of the Biot-Savart law. This option is only relevant when the wake type is set to "Free Wake".

default = 1

VortexWakeTimeStep: number (s), optionalcoming soon

The time step used to update the vortex wake. It is recommended to select a time step such that at least 60 vortex wake steps are taken each rotor revolution.

default = 0.05

WakeType: string, optionalcoming soon

The "Free Wake" option will calculate the mutual influence of all wake elements on all wake nodes during each time step. The "Fixed Wake" option will assume that the induced velocity in all wake nodes is equal to the average wake induced velocity at 70% blade radius. The "Free Wake" option requires substantially more calculations to be performed, and is likely to significantly slow the analysis.

default = FreeWake

CoreGrowthModel: string, optionalcoming soon

The Core Growth Model.

default = RL_Model

InitialVortexCoreSizeModel: string, optionalcoming soon

The intial vortex core size Model.

default = RL_Model

FilamentStrain: boolean, optionalcoming soon

The filament strain.

default = True

LambOseenCoreGrowthConstant: number, optionalcoming soon

The Lamb-Oseen core growth constant,

default = 1.234

CoreGrowthConstant: number, optionalcoming soon

The core growth constant.

default = 50.0

RamasamyLeishmanConstant: number, optionalcoming soon

The Ramasamy-Leishman constant.

default = 6.5e-05