![]() In the Pitt/Peters correction model, or enter "default" to use the default SkewModFactor is used only when SkewMod = 2. The coupled model ``SkewMod=ģ`` is not available in this version of AeroDyn. SkewMod to 1 to use the uncoupled BEM solution technique withoutĪn additional skewed-wake correction. SkewMod determines the skewed-wake correction model. The input parameters in this section are not used when WakeMod = 0. Is the vapor pressure of the fluid for seawater this is typicallyĤ.2.1.2.2.3. Pressure above the free surface typically around 101,325 Pa. Last two parameters in this section are only used whenĬavitCheck = TRUE for MHK turbines. Turbines) and 1500 m/s for seawater (MHK turbines). (used to calculate the Mach number within the unsteady airfoilĪerodynamics calculations) a typical value is around 340.3 m/s for air (wind SpdSound is the speed of sound in the fluid M 2/s for air (wind turbines) and 1.004E-6 m 2/s for ![]() Reynolds number calculation) a typical value is around 1.460E-5 KinVisc specifies the kinematic viscosity of the fluid (used in the Turbines) and 1025 kg/m 3 for seawater (MHK turbines). Greater than zero a typical value is around 1.225 kg/m 3 for air (wind AirDens specifies the fluid density and must be a value Values given in the AeroDyn primary input file will overwrite those given in theĭriver input file. Use the keywordĭEFAULT to pass in values specified by the driver input file. The AeroDyn primary input file for legacy compatibility. See Section 4.2.3 for information on how to use thisĮnvironmental conditions are now specified in driver input files but are left in The AA_InputFile is used to specify the input file for the aeroacoustics See section Section 4.2.3 for information on how to Option is only available for WakeMod = 1 or 2 and is not available forĪn MHK turbine. Set the CompAA flag to TRUE to run aero-acoustic calculations. Input file must be set to 1 or 2 to indicate an MHK turbine is being modeled. If Buoyancy is TRUE, the MHK flag in the AeroDyn or OpenFAST driver Tower, nacelle, and hub of an MHK turbine or FALSE to disable this calculation. Set the Buoyancy flag to TRUE to calculate buoyant loads on the blades, To 1 or 2 to indicate an MHK turbine is being modeled. TRUE, the MHK flag in the AeroDyn or OpenFAST driver input file must be set Not function with unsteady airfoil aerodynamics. TRUE, AFAeroMod must be set to 1 because the cavitation check does Turbines or FALSE to disable this calculation. Set the CavitCheck flag to TRUE to perform a cavitation check for MHK Recalculate the induction during linearization using BEM theory. to fix the axial and tangential induces velocities,Īnd, at their operating-point values during linearization) or FALSE to With AeroDyn coupled OpenFAST and BEM enabled ( WakeMod = 1), set theįrozenWake flag to TRUE to employ frozen-wake assumptions during Set the TwrAero flag to TRUE to calculate fluid drag loads on the The tower influence from potential flow and tower shadow are bothĮnabled, the two influences will be superimposed. These models calculate the influence of the tower on theįlow local to the blade based on the downstream tower shadow model. Set the TwrShadow to 0 to disable to the tower shadow model,ġ to enable the Powles tower shadow model, or 2 to use the Eames tower The Bak correction in the potential-flow model. Potential-flow influence of the tower on the fluid flow local to theīlade, 1 to enable the standard potential-flow model, or 2 to include To enable UA AFAeroMod must be 1 during linearization analyses Set AFAeroMod to 1 to include steady blade airfoil aerodynamics or 2 ![]() WakeMod cannot be set to 2 or 3 during linearization To 3, the free vortex wake model is used, also referred to as OLAF (see Referred to as dynamic inflow or dynamic wake model, see Section 4.2.1.6.2). WakeMod is set to 2, a dynamic BEM theory model (DBEMT) is used (also Include these effects using the (quasi-steady) BEM theory model. Set WakeMod to 0 if you want to disable rotor wake/induction effects or 1 to Time step prescribed by the driver code (OpenFAST or the standalone driver The keyword DEFAULTįor DTAero may be used to indicate that AeroDyn should employ the To avoid numerical problems in the UA routines. Small time steps, you may need to recompile AeroDyn in double precision However, when AeroDyn is coupled to OpenFAST, OpenFAST may require time steps Such that there are at least 200 azimuth steps per rotor revolution. ForĪccuracy and numerical stability, we recommend that DTAero be set Running AeroDyn standalone, or by the OpenFAST program when running aĭTAero sets the time step for the aerodynamic calculations. Specified in the I/O SETTINGS section of the driver input file when The echo file has the namingĬonvention of OutRootFile.AD.ech. Set the Echo flag to TRUE if you wish to have AeroDyn echo theĬontents of the AeroDyn primary, airfoil, and blade input files (usefulįor debugging errors in the input files). ![]()
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