| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2024-2026 OpenFOAM Foundation | |
| \\/ M anipulation | | |
| ------------------------------------------------------------------------------- | |
| License | |
| This file is part of OpenFOAM. | |
| OpenFOAM is free software: you can redistribute it and/or modify it | |
| under the terms of the GNU General Public License as published by | |
| the Free Software Foundation, either version 3 of the License, or | |
| (at your option) any later version. | |
| OpenFOAM is distributed in the hope that it will be useful, but WITHOUT | |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>. | |
| Class | |
| Foam::fv::propellerDisk | |
| Description | |
| Disk momentum source which approximates a propeller based on a given | |
| propeller curve. | |
| Reference: | |
| \verbatim | |
| Hough, G. R., & Ordway, D. E. (1964). | |
| The generalized actuator disk. | |
| Developments in theoretical and applied mechanics, 2, 317-336. | |
| \endverbatim | |
| Usage | |
| Example usage: | |
| \verbatim | |
| diskSource | |
| { | |
| type propellerDisk; | |
| libs ("libpropellerDisk.so"); | |
| cellZone propeller; | |
| normal (1 0 0); // Normal direction of the propeller | |
| n 26.03; // Rotation speed [1/s] | |
| dPropeller 0.203; // Propeller diameter | |
| dHub 0.039179; // Hub diameter | |
| propellerCurve | |
| { | |
| type table; | |
| // J Kt Kq | |
| values | |
| ( | |
| (0.10 (0.3267 0.03748)) | |
| (0.15 (0.3112 0.03629)) | |
| (0.20 (0.2949 0.03500)) | |
| (0.25 (0.2777 0.03361)) | |
| (0.30 (0.2598 0.03210)) | |
| (0.35 (0.2410 0.03047)) | |
| (0.40 (0.2214 0.02871)) | |
| (0.45 (0.2010 0.02682)) | |
| (0.50 (0.1798 0.02479)) | |
| (0.55 (0.1577 0.02261)) | |
| (0.60 (0.1349 0.02027)) | |
| (0.65 (0.1112 0.01777)) | |
| (0.70 (0.0867 0.01509)) | |
| (0.75 (0.0614 0.01224)) | |
| (0.80 (0.0353 0.00921)) | |
| ); | |
| } | |
| } | |
| \endverbatim | |
| SourceFiles | |
| propellerDisk.C | |
| propellerDiskTemplates.C | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| namespace fv | |
| { | |
| class propellerDiskAdjustment; | |
| /*---------------------------------------------------------------------------*\ | |
| Class propellerDisk Declaration | |
| \*---------------------------------------------------------------------------*/ | |
| class propellerDisk | |
| : | |
| public fvModel | |
| { | |
| protected: | |
| // Protected Data | |
| //- The cellZone the fvConstraint applies to | |
| fvCellZone zone_; | |
| //- The name of the phase to which this fvModel applies | |
| word phaseName_; | |
| //- Name of the velocity field | |
| word UName_; | |
| //- Propeller disk centre | |
| vector centre_; | |
| //- Propeller disk normal direction | |
| vector normal_; | |
| //- Rotation speed [1/s] | |
| scalar n_; | |
| //- Rotation direction (obtained from the sign of n_) | |
| scalar rotationDir_; | |
| //- Propeller diameter | |
| scalar dProp_; | |
| //- Hub diameter | |
| scalar dHub_; | |
| //- Propeller function | |
| autoPtr<Function1<vector2D>> propellerFunction_; | |
| mutable autoPtr<volInternalVectorField> forcePtr_; | |
| //- Current force of the fluid on the propeller | |
| mutable vector force_; | |
| //- Current moment of the fluid on the propeller | |
| mutable vector moment_; | |
| //- Optional switch to enable logging of integral properties | |
| Switch log_; | |
| //- Optional log file | |
| mutable autoPtr<functionObjects::logFile> logFile_; | |
| autoPtr<propellerDiskAdjustment> adjustment_; | |
| // Protected Member Functions | |
| //- Read the model coefficients | |
| virtual void readCoeffs(const dictionary& dict); | |
| //- Return the propeller normal | |
| virtual vector normal() const | |
| { | |
| return normal_; | |
| } | |
| //- Return the rotation speed | |
| scalar n() const; | |
| //- Rotation speed correction | |
| void correctn(const scalar T) const; | |
| //- Computes the thickness of the disk in streamwise direction | |
| scalar diskThickness(const vector& centre) const; | |
| //- Return the normalised flow-rate through the disk | |
| scalar J(const vectorField& U, const vector& nHat) const; | |
| friend class propellerDiskAdjustment; | |
| private: | |
| // Private Member Functions | |
| //- Add resistance to the UEqn | |
| template<class AlphaFieldType, class RhoFieldType> | |
| void addActuationDiskAxialInertialResistance | |
| ( | |
| vectorField& Usource, | |
| const AlphaFieldType& alpha, | |
| const RhoFieldType& rho, | |
| const volInternalVectorField& U | |
| ) const; | |
| public: | |
| //- Runtime type information | |
| TypeName("propellerDisk"); | |
| // Constructors | |
| //- Construct from components | |
| propellerDisk | |
| ( | |
| const word& name, | |
| const word& modelType, | |
| const fvMesh& mesh, | |
| const dictionary& dict | |
| ); | |
| //- Disallow default bitwise copy construction | |
| propellerDisk(const propellerDisk&) = delete; | |
| //- Destructor | |
| virtual ~propellerDisk(); | |
| // Member Functions | |
| //- Return the propeller centre | |
| virtual vector centre() const | |
| { | |
| return centre_; | |
| } | |
| //- Return the current force of the fluid on the propeller | |
| vector force() const | |
| { | |
| return force_; | |
| } | |
| //- Return the current moment of the fluid on the propeller | |
| vector moment() const | |
| { | |
| return moment_; | |
| } | |
| // Checks | |
| //- Return the list of fields for which the fvModel adds source term | |
| // to the transport equation | |
| virtual wordList addSupFields() const; | |
| // Add explicit and implicit contributions | |
| //- Source term to momentum equation | |
| virtual void addSup | |
| ( | |
| const volVectorField& U, | |
| fvMatrix<vector>& eqn | |
| ) const; | |
| //- Source term to compressible momentum equation | |
| virtual void addSup | |
| ( | |
| const volScalarField& rho, | |
| const volVectorField& U, | |
| fvMatrix<vector>& eqn | |
| ) const; | |
| //- Explicit and implicit sources for phase equations | |
| virtual void addSup | |
| ( | |
| const volScalarField& alpha, | |
| const volScalarField& rho, | |
| const volVectorField& U, | |
| fvMatrix<vector>& eqn | |
| ) const; | |
| // Mesh changes | |
| //- Update for mesh motion | |
| virtual bool movePoints(); | |
| //- Update topology using the given map | |
| virtual void topoChange(const polyTopoChangeMap&); | |
| //- Update from another mesh using the given map | |
| virtual void mapMesh(const polyMeshMap&); | |
| //- Redistribute or update using the given distribution map | |
| virtual void distribute(const polyDistributionMap&); | |
| // IO | |
| //- Read dictionary | |
| virtual bool read(const dictionary& dict); | |
| // Member Operators | |
| //- Disallow default bitwise assignment | |
| void operator=(const propellerDisk&) = delete; | |
| }; | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| } // End namespace fv | |
| } // End namespace Foam | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |