[AlxB]

Hello,

I have tested some variations in the fvOptions of the rotorDisk tutorial, see below, but unfortunately I haven't found the way to reverse the rotational direction of the rotor.
How this could be done?
Thank you

disk
{
    type            rotorDisk;

    selectionMode   cellZone;
    cellZone        rotatingZone;

    fields          (U);    // Names of fields on which to apply source
    nBlades         3;      // Number of blades
    tipEffect       0.96;   // Normalised radius above which lift = 0

    inletFlowType   local;  // Inlet flow type specification
    inletVelocity   (0 1 0);

    geometryMode    specified;

    origin          (0 0 0);
    axis            (0 1 0);

    refDirection    (0 0 1);  // Reference direction
                              // - used as reference for psi angle
    rpm             1000;
    //pointAbove    (0 0 0.25);

    trimModel       fixedTrim;  // fixed || targetForce

    rhoRef          1000;
    rhoInf          1;

    fixedTrimCoeffs
    {
         theta0         0;
         theta1c        0;
         theta1s        0;
    }

    flapCoeffs
    {
        beta0           0;  // Coning angle [deg]
        beta1c          0;  // Lateral flapping coeff (cos coeff)
        beta2s          0;  // Longitudinal flapping coeff (sin coeff)
    }

    blade
    {
        data
        (
            (profile1 (0.1 -6 0.02))
            (profile1 (0.25 -6 0.02))
        );
    }

    profiles
    {
        profile1
        {
            type lookup;
            data
            (
                (-90 0.21 1.45)
                (-18 0.21 1.45)
                (-16 0.165 1.3)
                (-14 0.125 1.1)
                (-12 0.092 0.95)
                (-10 0.07 0.8)
                (-8 0.05 0.64)
                (-6 0.04 0.5)
                (-4 0.028 0.32)
                (-2 0.022 0.18)
                (0 0.02 0)
                (2 0.022 0.18)
                (4 0.028 0.32)
                (6 0.04 0.5)
                (8 0.05 0.64)
                (10 0.07 0.8)
                (12 0.092 0.95)
                (14 0.125 1.1)
                (16 0.165 1.3)
                (18 0.21 1.45)
                (90 0.21 1.45)
            );
        }
    }
}

[djason]

Is it not simply -1000 for rpm, or axis (0 -1 0);?
I am using it currently as well, but I find it will not run for rpm lower than 1000. Did you have this problem? Also, not sure if rpm is actually rpm or rad/s ..

[AlxB]

If I try an opposite rpm (-1000) or an opposite reference direction, ie. (0 -1 0) instead of (0 1 0), then the run crashes.

However I have just found a way to do it: invert the fan axis (not the reference axis) and then invert the blade angle. I use openFoam v2212


Furthermore do you know how to write the effective drag, effective lift, min/max(AOA) and rotation direction in an output file?

[PRIDEmartins]

I just tried this and it worked. I expent half of my day trying to reverse the rotor rotational direction.

Originally Posted by AlxB

If I try an opposite rpm (-1000) or an opposite reference direction, ie. (0 -1 0) instead of (0 1 0), then the run crashes.

However I have just found a way to do it: invert the fan axis (not the reference axis) and then invert the blade angle. I use openFoam v2212


Furthermore do you know how to write the effective drag, effective lift, min/max(AOA) and rotation direction in an output file?