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VAWT getting torque..

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Old   March 31, 2017, 02:35
Default VAWT getting torque..
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bye bye my blue
Join Date: Sep 2016
Posts: 37
Rep Power: 2
bye bye my blue is an unknown quantity at this point
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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