Multi Turbine Simulation Setup
QBlade-EE
This feature is only available in the Enterprise Edition of QBlade.
Fig. 128 The multi-turbine section in the simulation definition dialog.
To define a simulation containing multiple turbines the user needs to activate the multiple turbines option in the simulation dialog (see :fig:’fig-multi_turbines`). After the option has been set to On turbines can be added to the simulation.
Turbines can now be added manually, by clicking Add, or automated, through a Wind Farm Layout File. If added manually, thourgh the Add* button, the currently selected turbine definition, with all parameters that are currently selected in the dialog, is then added to the list of turbines.
If a Wind Farm Layout File is used turbines can be add automated. This is especially useful when simulating a very large number of turbines. An exemplary Wind Farm layout File is shown below. An Excel sheet, containing this data, can be downloaded here.
Fig. 129 An excel sheet containing the farm layout data, link: https://qblade.org/assets/LillgrundLayout.xlsx.
Name Turbine Object Name X Y Z RX RY RZ Yaw Pitch Azimuth Surge Sway Heave Plat.Roll Plat.Pitch Plat.Yaw RPM Prescribe Type Substeps RelaxSteps Iterations ModNewton IsAero IsHydro Event Loading Sim Motion
Turb1 NREL_2.3-116 0.0 -675.4 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb2 NREL_2.3-116 188.4 -1027.8 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb3 NREL_2.3-116 377.0 -1365.9 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb4 NREL_2.3-116 179.4 -4.0 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb5 NREL_2.3-116 372.6 -342.1 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb6 NREL_2.3-116 565.9 -680.2 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb7 NREL_2.3-116 749.8 -1023.0 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb8 NREL_2.3-116 938.4 -1370.6 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb9 NREL_2.3-116 552.2 338.9 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb10 NREL_2.3-116 745.5 5.6 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb11 NREL_2.3-116 938.7 -337.3 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb12 NREL_2.3-116 1131.9 -684.9 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb13 NREL_2.3-116 1311.2 -1032.5 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb14 NREL_2.3-116 1499.8 -1370.6 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb15 NREL_2.3-116 934.3 681.7 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb16 NREL_2.3-116 1122.9 343.7 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb17 NREL_2.3-116 1311.5 0.8 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb18 NREL_2.3-116 1877.3 -1023.0 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb19 NREL_2.3-116 2065.9 -1370.6 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb20 NREL_2.3-116 1311.8 1024.6 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb21 NREL_2.3-116 1500.4 686.5 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb22 NREL_2.3-116 1684.4 343.7 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb23 NREL_2.3-116 1873.0 5.6 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb24 NREL_2.3-116 2066.2 -346.8 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb25 NREL_2.3-116 2250.2 -684.9 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb26 NREL_2.3-116 2438.8 -1027.8 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb27 NREL_2.3-116 2627.4 -1365.9 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb28 NREL_2.3-116 1680.0 1367.5 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb29 NREL_2.3-116 1873.3 1024.6 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb30 NREL_2.3-116 2057.2 686.5 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb31 NREL_2.3-116 2250.4 338.9 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb32 NREL_2.3-116 2439.1 5.6 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb33 NREL_2.3-116 2627.6 -346.8 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb34 NREL_2.3-116 2816.3 -684.9 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb35 NREL_2.3-116 3000.2 -1027.8 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb36 NREL_2.3-116 2052.9 1710.3 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb37 NREL_2.3-116 2246.1 1362.7 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb38 NREL_2.3-116 2434.7 1029.4 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb39 NREL_2.3-116 2627.9 681.7 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb40 NREL_2.3-116 2811.9 338.9 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb41 NREL_2.3-116 3005.2 5.6 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb42 NREL_2.3-116 3189.1 -337.3 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb43 NREL_2.3-116 3382.4 -680.2 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb44 NREL_2.3-116 2435.0 2053.2 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb45 NREL_2.3-116 2623.6 1705.6 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb46 NREL_2.3-116 2807.6 1372.2 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb47 NREL_2.3-116 3005.4 1029.4 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Turb48 NREL_2.3-116 3170.7 667.5 0.0 0 0 0 -10 0 0 0 0 0 0 0 0 2 0 1 1 10 1 1 1 none none none none
Fig. 130 The Wind Farm Layout loaded with the Lillgrund template, shown above
Furthermore, it is also possible to add a global mooring system to a multi turbine simulation. More information on this is found in the section Multi Turbine Global Mooring System.
Multi Turbine Global Mooring System
QBlade-EE
This feature is only available in the Enterprise Edition of QBlade.
Fig. 131 A global mooring definition, connecting two turbines in a multi turbine simulation.
For multi-turbine simulations it is also possible to define a global mooring system. A global mooring system can be defined as an interconnection between different turbines (or floaters) in a multi-turbine simulation. In the example shown below a mooring system is defined that connects Joint 43 of Turbine 1 (JNT_1_43) to Joint 43 of Turbine 2 (JNT_2_43). In general, the global mooring system definition can contain a MOORELEMENTS table, a MOORMEMBERS table, and a HYDROMEMBERCOEFF table, following the same methodology as the mooring line definitions for turbine substructure.
Furthermore, it is also possible to include SUBMEMBERS, SUBELEMENTS, SUBCONSTRAINTS and NLSPRINGDAMPERS and MOORLOADS in the same way as described in the Substructure Modeling.
The simulation data that is stored from the global mooring system can be viewed in the Simulation Time Graph.
The global mooring system definition file shown below is used to setup the mooring conficuration that is shown in Fig. 131.
true ISFLOATING
100 ADVANCEDBUOYANCY
1.00 STIFFTUNER
1.00 MASSTUNER
1.00 BUOYANCYTUNER
SUBJOINTS
JointID JointX JointY JointZ
1 0.00000 0.00000 -10.00000
2 0.00000 0.00000 10.00000
3 0.00000 0.00000 -13.00000
SUBELEMENTSRIGID
ElemID BMASSD DIAMETER
1 10000 5.5
2 100000 5.5
HYDROJOINTCOEFF
CoeffID JointID CdA CaA CpA
1 2 4.8 1.0 1.0
2 3 4.8 1.0 1.0
SUBMEMBERS
MemID Jnt1ID Jnt2ID ElmID ElmRot HyCoID IsBuoy MaGrID FldArea ElmDsc Name (optional)
1 1 2 1 0 1 1 0 0 2 Main_Colum
2 1 3 2 0 1 1 0 0 2 Main_Column2
HYDROMEMBERCOEFF
CoeffID CdN CaN CpN MCFC
1 2.0 0.8 1.0 0
MOORELEMENTS
ID Dens.[kg/m^3] Area[m^2] Iyy[m^4] EMod[N/m^4] RDp.[-] Dia[m]
1 2.35723E+04 4.6084E-03 3.7601E-03 1.6353E+11 0.015 0.0766
2 6.35723E+04 4.6084E-03 3.7601E-04 1.6353E+10 0.005 0.0766
MOORMEMBERS
ID CONN_1 CONN_2 Len.[m] MoorID HyCoID IsBuoy MaGrID ElmDsc Name
1 JNT_1_43 JNT_3 270 1 1 1 0 30 Mooring1
2 JNT_2_43 JNT_3 270 1 1 1 0 30 Mooring2
3 JNT_1_1 JNT_2_1 700 2 1 1 0 30 Power
MOORLOADS
3 150 180 16000
3 520 550 16000
RGBCOLOR
255 0 0
------------------------------- DATA OUTPUT TYPES -------------------------
true FOR_OUT
true ROT_OUT
true MOM_OUT
true DEF_OUT
true POS_OUT
true VEL_OUT
true ACC_OUT
true LVE_OUT
true LAC_OUT
------------------------------- SENSORS ------------------------------------
SUB_1_0.5
MOO_1_0.2
Multi Turbine Simulation Definition ASCII File
Within the Simulation Definition ASCII Files a multi-turbine simulation can be defined in two ways. The first option is to specify the path to the Farm Layout File (parameter FARMLAYOUT). In the farm layout file the turbine definitions and boundary conditions are defined.
The second options is is to defined multiple turbines by encapsulating each turbine object by TURB_X and END_TURB_X where X is the turbine number staring from 1. An example for a multi turbine simulation definition ASCII file that also contains a global mooring system is shown below.
----------------------------------------QBlade Simulation Definition File------------------------------------------
Generated with : QBlade IH v2.0.7-release_candidate_beta windows
Archive Format: 310023
Time : 21:43:28
Date : 15.05.2024
----------------------------------------Object Name-----------------------------------------------------------------
New_Turbine_Simulation OBJECTNAME - the name of the simulation object
----------------------------------------Simulation Type-------------------------------------------------------------
0 ISOFFSHORE - use a number: 0 = onshore; 1 = offshore
----------------------------------------Turbine Parameters---------------------------------------------------------
NREL_2.3-116/NREL_2.3-116.trb TURBFILE - the turbine definition file(s) used in this simulation
farmLayout.xlsx FARMLAYOUT - the farmlayout file (if existing)
----------------------------------------Simulation Settings-------------------------------------------------------
0.025366 TIMESTEP - the timestep size in [s]
1000 NUMTIMESTEPS - the number of timesteps
20.000 RAMPUP - the rampup time for the structural model
0.000 ADDDAMP - the initial time with additional damping
50.000 ADDDAMPFACTOR - for the additional damping time this factor is used to increase the damping of all components
0.000 WAKEINTERACTION - in case of multi-turbine simulation the wake interaction start at? [s]
----------------------------------------Wind Input-----------------------------------------------------------------
0 WNDTYPE - use a number: 0 = steady; 1 = windfield; 2 = hubheight
WNDNAME - filename of the turbsim input file, mann input file or hubheight file (with extension), leave blank if unused
0 STITCHINGTYPE - the windfield stitching type; 0 = periodic; 1 = mirror
true WINDAUTOSHIFT - the windfield shifting automatically based on rotor diameter [bool]
0.00 SHIFTTIME - the windfield is shifted by this time if WINDAUTOSHIFT = 0
10.00 MEANINF - the mean inflow velocity, overridden if a windfield or hubheight file is use
0.00 HORANGLE - the horizontal inflow angle
0.00 VERTANGLE - the vertical inflow angle
0 PROFILETYPE - the type of wind profile used (0 = Power Law; 1 = Logarithmic)
0.000 SHEAREXP - the shear exponent if using a power law profile, if a windfield is used these values are used to calculate the mean wake convection velocities
0.010 ROUGHLENGTH - the roughness length if using a log profile, if a windfield is used these values are used to calculate the mean wake convection velocities
0.00 DIRSHEAR - a value for the directional shear in deg/m
78.00 REFHEIGHT - the reference height, used to contruct the BL profile
----------------------------------------Ocean Depth, Waves and Currents-------------------------------------------
the following parameters only need to be set if ISOFFSHORE = 1
1.00 WATERDEPTH - the water depth
WAVEFILE - the path to the wave file, leave blank if unused
1 WAVESTRETCHING - the type of wavestretching, 0 = vertical, 1 = wheeler, 2 = extrapolation, 3 = none
10000.00 SEABEDSTIFF - the vertical seabed stiffness [N/m^3]
0.20 SEABEDDAMP - a damping factor for the vertical seabed stiffness evaluation, between 0 and 1 [-]
0.10 SEABEDSHEAR - a factor for the evaluation of shear forces (friction), between 0 and 1 [-]
0.00 SURF_CURR_U - near surface current velocity [m/s]
0.00 SURF_CURR_DIR - near surface current direction [deg]
30.00 SURF_CURR_DEPTH - near surface current depth [m]
0.00 SUB_CURR_U - sub surface current velocity [m/s]
0.00 SUB_CURR_DIR - sub surface current direction [deg]
0.14 SUB_CURR_EXP - sub surface current exponent
0.00 SHORE_CURR_U - near shore (constant) current velocity [m/s]
0.00 SHORE_CURR_DIR - near shore (constant) current direction [deg]
----------------------------------------Global Mooring System------------------------------------------------------
MOORINGSYSTEM - the path to the global mooring system file, leave blank if unused
----------------------------------------Dynamic Wake Meandering----------------------------------------------------
2 DWMSUMTYPE - the dynamic wake meandering wake summation type: 0 = DOMINANT; 1 = QUADRATIC; 2 = LINEAR
----------------------------------------Environmental Parameters---------------------------------------------------
1.22500 DENSITYAIR - the air density [kg/m^3]
0.000016470 VISCOSITYAIR - the air kinematic viscosity
1025.00000 DENSITYWATER - the water density [kg/m^3]
0.000001307 VISCOSITYWATER - the water kinematic viscosity [m^2/s]
9.806650000 GRAVITY - the gravity constant [m/s^2]
----------------------------------------Output Parameters----------------------------------------------------------
0.00000 STOREFROM - the simulation stores data from this point in time, in [s]
false STOREREPLAY - store a replay of the simulation (warning, large memory will be required) [bool]
true STOREAERO - should the aerodynamic data be stored [bool]
true STOREBLADE - should the local aerodynamic blade data be stored [bool]
true STORESTRUCT - should the structural data be stored [bool]
true STORESIM - should the simulation (performance) data be stored [bool]
true STOREHYDRO - should the controller data be stored [bool]
false STORECONTROLLER - should the controller data be stored [bool]
false STOREDWM - should the dynamic wake meandering (DWM) data be stored [bool]
----------------------------------------Modal Analysis Parameters--------------------------------------------------
false CALCMODAL - perform a modal analysis (only single turbine simulations) [bool]
0.00000 MINFREQ - store Eigenvalues, starting with this frequency
0.00000 DELTAFREQ - omit Eigenvalues that are closer spaced than this value
100.00000 NUMFREQ - set the number of Eigenmodes and Eigenvalues that will be stored
Listing 106 : A multi turbine simulation definition file using explicit, encapsulated, turbine definitions
----------------------------------------QBlade Simulation Definition File------------------------------------------
Generated with : QBlade IH v2.0.6_beta_dev windows
Archive Format: 310012
Time : 19:16:58
Date : 18.05.2023
----------------------------------------Object Name-----------------------------------------------------------------
New_Turbine_Simulation OBJECTNAME - the name of the simulation object
----------------------------------------Simulation Type-------------------------------------------------------------
1 ISOFFSHORE - use a number: 0 = onshore; 1 = offshore
----------------------------------------Turbine Parameters---------------------------------------------------------
multiple turbines can be added by adding multiple definitions encapsulated with TURB_X and END_TURB_X, where X must start at 1
TURB_1
NREL_5MW_OC4_SEMI_RWT/NREL_5MW_OC4_SEMI_RWT.trb TURBFILE - the turbine definition file that is used for this simulation
NREL_5MW_OC4_SEMI_RWT TURBNAME - the (unique) name of the turbine in the simulation (results will appear under this name)
0.00 INITIAL_YAW - the initial turbine yaw in [deg]
0.00 INITIAL_PITCH - the initial collective blade pitch in [deg]
0.00 INITIAL_AZIMUTH - the initial azimuthal rotor angle in [deg]
1 STRSUBSTEP - the number of structural substeps per timestep (usually 1)
5 RELAXSTEPS - the number of initial static structural relaxation steps
0 PRESCRIBETYPE - rotor RPM prescribe type (0 = ramp-up; 1 = whole sim; 2 = no RPM prescibed)
4.000 RPMPRESCRIBED - the prescribed rotor RPM [-]
10 STRITERATIONS - number of iterations for the time integration (used when integrator is HHT or Euler)
1 MODNEWTONITER - use the modified newton iteration?
300.00 GLOBPOS_X - the global x-position of the turbine [m]
0.00 GLOBPOS_Y - the global y-position of the turbine [m]
0.00 GLOBPOS_Z - the global z-position of the turbine [m]
0.00 GLOBROT_X - the global x-rotation of the turbine [deg]
0.00 GLOBROT_Y - the global y-rotation of the turbine [deg]
0.00 GLOBROT_Z - the global z-rotation of the turbine [deg]
EVENTFILE - the file containing fault event definitions (leave blank if unused)
LOADINGFILE - the loading file name (leave blank if unused)
SIMFILE - the simulation file name (leave blank if unused)
MOTIONFILE - the prescribed motion file name (leave blank if unused)
0.00 FLOAT_SURGE - the initial floater surge [m]
0.00 FLOAT_SWAY - the initial floater sway [m]
0.00 FLOAT_HEAVE - the initial floater heave [m]
0.00 FLOAT_ROLL - the initial floater roll [deg]
0.00 FLOAT_PITCH - the initial floater pitch [deg]
0.00 FLOAT_YAW - the initial floater yaw [deg]
END_TURB_1
TURB_2
NREL_5MW_OC4_SEMI_RWT-2/NREL_5MW_OC4_SEMI_RWT-2.trb TURBFILE - the turbine definition file that is used for this simulation
NREL_5MW_OC4_SEMI_RWT-2 TURBNAME - the (unique) name of the turbine in the simulation (results will appear under this name)
180.00 INITIAL_YAW - the initial turbine yaw in [deg]
0.00 INITIAL_PITCH - the initial collective blade pitch in [deg]
0.00 INITIAL_AZIMUTH - the initial azimuthal rotor angle in [deg]
1 STRSUBSTEP - the number of structural substeps per timestep (usually 1)
5 RELAXSTEPS - the number of initial static structural relaxation steps
0 PRESCRIBETYPE - rotor RPM prescribe type (0 = ramp-up; 1 = whole sim; 2 = no RPM prescibed)
4.000 RPMPRESCRIBED - the prescribed rotor RPM [-]
10 STRITERATIONS - number of iterations for the time integration (used when integrator is HHT or Euler)
1 MODNEWTONITER - use the modified newton iteration?
-300.00 GLOBPOS_X - the global x-position of the turbine [m]
0.00 GLOBPOS_Y - the global y-position of the turbine [m]
0.00 GLOBPOS_Z - the global z-position of the turbine [m]
0.00 GLOBROT_X - the global x-rotation of the turbine [deg]
0.00 GLOBROT_Y - the global y-rotation of the turbine [deg]
0.00 GLOBROT_Z - the global z-rotation of the turbine [deg]
EVENTFILE - the file containing fault event definitions (leave blank if unused)
LOADINGFILE - the loading file name (leave blank if unused)
SIMFILE - the simulation file name (leave blank if unused)
MOTIONFILE - the prescribed motion file name (leave blank if unused)
0.00 FLOAT_SURGE - the initial floater surge [m]
0.00 FLOAT_SWAY - the initial floater sway [m]
0.00 FLOAT_HEAVE - the initial floater heave [m]
0.00 FLOAT_ROLL - the initial floater roll [deg]
0.00 FLOAT_PITCH - the initial floater pitch [deg]
180.00 FLOAT_YAW - the initial floater yaw [deg]
END_TURB_2
----------------------------------------Simulation Settings-------------------------------------------------------
0.050000 TIMESTEP - the timestep size in [s]
800 NUMTIMESTEPS - the number of timesteps
20.000 RAMPUP - the rampup time for the structural model
0.000 ADDDAMP - the initial time with additional damping
100.000 ADDDAMPFACTOR - for the additional damping time this factor is used to increase the damping of all components
0.000 WAKEINTERACTION - in case of multi-turbine simulation the wake interaction start at? [s]
----------------------------------------Wind Input-----------------------------------------------------------------
0 WNDTYPE - use a number: 0 = steady; 1 = windfield; 2 = hubheight
WNDNAME - filename of the turbsim input file or hubheight file (with extension), leave blank if unused
0 STITCHINGTYPE - the windfield stitching type; 0 = periodic; 1 = mirror
1 WINDAUTOSHIFT - the windfield shifting automatically based on rotor diameter; 0 = false; 1 = true
0.00 SHIFTTIME - the windfield is shifted by this time if WINDAUTOSHIFT = 0
10.00 MEANINF - the mean inflow velocity, overridden if a windfield or hubheight file is use
0.00 HORANGLE - the horizontal inflow angle
0.00 VERTANGLE - the vertical inflow angle
0 PROFILETYPE - the type of wind profile used (0 = Power Law; 1 = Logarithmic)
0.000 SHEAREXP - the shear exponent if using a power law profile, if a windfield is used these values are used to calculate the mean wake convection velocities
0.010 ROUGHLENGTH - the roughness length if using a log profile, if a windfield is used these values are used to calculate the mean wake convection velocities
0.00 DIRSHEAR - a value for the directional shear in deg/m
77.60 REFHEIGHT - the reference height, used to contruct the BL profile
----------------------------------------Ocean Depth, Waves and Currents-------------------------------------------
the following parameters only need to be set if ISOFFSHORE = 1
200.00 WATERDEPTH - the water depth
New_Wave.lwa WAVEFILE - the path to the wave file, leave blank if unused
1 WAVESTRETCHING - the type of wavestretching, 0 = vertical, 1 = wheeler, 2 = extrapolation, 3 = none
10000.00 SEABEDSTIFF - the vertical seabed stiffness [N/m^3]
0.50 SEABEDDAMP - a damping factor for the vertical seabed stiffness evaluation, between 0 and 1 [-]
0.00 SEABEDSHEAR - a factor for the evaluation of shear forces (friction), between 0 and 1 [-]
0.00 SURF_CURR_U - near surface current velocity [m/s]
0.00 SURF_CURR_DIR - near surface current direction [deg]
30.00 SURF_CURR_DEPTH - near surface current depth [m]
0.00 SUB_CURR_U - sub surface current velocity [m/s]
0.00 SUB_CURR_DIR - sub surface current direction [deg]
0.14 SUB_CURR_EXP - sub surface current exponent
0.00 SHORE_CURR_U - near shore (constant) current velocity [m/s]
0.00 SHORE_CURR_DIR - near shore (constant) current direction [deg]
----------------------------------------Global Mooring System------------------------------------------------------
mooring.txt MOORINGSYSTEM - the path to the global mooring system file, leave blank if unused
----------------------------------------Environmental Parameters---------------------------------------------------
1.22500 DENSITYAIR - the air density [kg/m^3]
0.000016470 VISCOSITYAIR - the air kinematic viscosity
1025.00000 DENSITYWATER - the water density [kg/m^3]
0.000001307 VISCOSITYWATER - the water kinematic viscosity [m^2/s]
9.806650000 GRAVITY - the gravity constant [m/s^2]
----------------------------------------Output Parameters----------------------------------------------------------
0 STOREREPLAY - store a replay of the simulation: 0 = off, 1 = on (warning, large memory will be required)
20.000 STOREFROM - the simulation stores data from this point in time, in [s]
1 STOREAERO - should the aerodynamic data be stored (0 = OFF; 1 = ON)
0 STOREBLADE - should the local aerodynamic blade data be stored (0 = OFF; 1 = ON)
1 STORESTRUCT - should the structural data be stored (0 = OFF; 1 = ON)
1 STORESIM - should the simulation (performance) data be stored (0 = OFF; 1 = ON)
1 STOREHYDRO - should the controller data be stored (0 = OFF; 1 = ON)
0 STORECONTROLLER - should the controller data be stored (0 = OFF; 1 = ON)
----------------------------------------Modal Analysis Parameters--------------------------------------------------
0 CALCMODAL - perform a modal analysis after the simulation has completed (only for single turbine simulations)
0.00000 MINFREQ - store Eigenvalues, starting with this frequency
0.00000 DELTAFREQ - omit Eigenvalues that are closer spaced than this value