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March 31, 2017, 02:35 |
VAWT getting torque..
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#1 |
Member
bye bye my blue
Join Date: Sep 2016
Posts: 37
Rep Power: 8 |
did you know how can get torque VAWT?
I used functionobject in controlDict but It seems wrong... because torque value of single blade (total : 2blades) is minimum at 180 degrees and torque value is almost 0 at 180~360. but mine is not.. here is my controlDict /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.2.2 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; location "system"; object controlDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // //libs //( // "libincompressibleTurbulenceModel.so" /// "libincompressibleRASModels.so" //); application pimpleDyMFoam; startFrom latestTime; startTime 0; stopAt endTime; endTime 0.381708; //4REVOLUTIONS deltaT 0.0001; writeControl adjustableRunTime; writeInterval 0.010603; //10DEGREES purgeWrite 0; writeFormat ascii; writePrecision 6; writeCompression off; timeFormat general; timePrecision 6; runTimeModifiable true; adjustTimeStep yes; maxCo 50; functions { #include "surfaces" forces_btm { type forces; libs ( "libforces.so" ); writeControl writeTime; writeInterval 1; log yes; patches (bottom_airfoil); rho rhoInf; UName U; pName p; log true; rhoInf 1.204; CofR (0 0 0); } forces_up { type forces; libs ( "libforces.so" ); writeControl writeTime; writeInterval 1; log yes; patches (upper_airfoil); rho rhoInf; UName U; pName p; log true; rhoInf 1.204; CofR (0 0 0); } forceCoeffs_up { type forceCoeffs; libs ( "libforces.so" ); writeControl writeTime; writeInterval 1; log yes; patches (upper_airfoil); rho rhoInf; // Indicates incompressible rhoInf 1.204; // Redundant for incompressible liftDir (0 1 0); dragDir (1 0 0); CofR (0 0 0);// Axle midpoint on ground pitchAxis (0 0 1); magUInf 8.0; lRef 0.265; // Wheelbase length Aref 0.265; // Estimated } forceCoeffs_bottom { type forceCoeffs; libs ( "libforces.so" ); writeControl writeTime; writeInterval 1; log yes; patches (bottom_airfoil); rho rhoInf; // Indicates incompressible rhoInf 1.204; // Redundant for incompressible liftDir (0 1 0); dragDir (1 0 0); CofR (0 0 0);// Axle midpoint on ground pitchAxis (0 0 1); magUInf 8.0; lRef 0.265; // Wheelbase length Aref 0.265; // Estimated } } // ************************************************** *********************** // |
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