Non Linear Lifting Line Theory Simulation Used in QBlade
Theory
Vortex Method
Flow Modelling
Inviscid
Incompresible
Irrotational
Introduction of vortex elements
Straight and curved elements for rotor blades or wings and wake modelling
Vortex Lattice Method
Panel Method
QBlade
Models rotor blades or wings with horseshoe vortices
Models the blade upper and lower surfaces with a mesh of vortex rings
Wake Modelling
Class of Vortex Methods
Prescribed wake
Free Wake
Nonlinear
Circulation computed for bound vortices on the LL, obtained from the lift and drag polars
Unsteady Aerodynamics Model
Attached flow
Dynamic Stall
Variable Reynolds number blade definitions
Simulation Set Up
Blade Discretization
Simulation Type
Wind Input Data
Rotor Angles
Starting Position
Operational Point
Length of Simulation
Time Discretization
Wake Convection
Vortex Modelling
Special Test Cases
Output Parameters
Algorithm Parameters
Separated into three zones
Zone 1: Shed and Trailing Vortices Exist
Zone 2: Shed vorticity is removed, trailing vorticity is concentrated into lumped vortices
Zone 3: Coarser spatial discretization
Parameters
Max Wage Length
Full Wake Length
Wake Reduction Factor
First Wake Row Length Fraction
Bio-Savart Equation
A model for a viscous cortex core implemented to prevent the singularity affecting the simulation
Desingularization model
Ramasay and Leishmann
Van Garrel
Parameters
Leishman z exponent
Vortex Time Offset
Turbulent Vortex viscosity
Maximum vortex stretching factor