Closed loop control of a flap exposed to harmonic aerodynamic actuation
Publication: Research - peer-review › Article in proceedings – Annual report year: 2012
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Closed loop control of a flap exposed to harmonic aerodynamic actuation. / Velte, Clara Marika; Mikkelsen, Robert Flemming; Sørensen, Jens Nørkær; Kaloyanov, Teodor ; Gaunaa, Mac.
In: Proceedings of Torque 2012, The science of making torque from wind. 2012.Publication: Research - peer-review › Article in proceedings – Annual report year: 2012
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TY - GEN
T1 - Closed loop control of a flap exposed to harmonic aerodynamic actuation
A1 - Velte,Clara Marika
A1 - Mikkelsen,Robert Flemming
A1 - Sørensen,Jens Nørkær
A1 - Kaloyanov,Teodor
A1 - Gaunaa,Mac
AU - Velte,Clara Marika
AU - Mikkelsen,Robert Flemming
AU - Sørensen,Jens Nørkær
AU - Kaloyanov,Teodor
AU - Gaunaa,Mac
PY - 2012
Y1 - 2012
N2 - Wind tunnel testing of a two-dimensional aerofoil with a load reducing flap has been conducted under the influence of a closed-loop controller (PID). Upstream synthetic perturbations for well-defined testing of the controller were generated by instrumenting the wind tunnel with two fast turning vanes placed in front of the main test wing. These were situated symmetrically above and below the airfoil in a way that created a fast turning of the air flow without directly affecting the boundary layer on the test airfoil. The Reynolds number was Re=500.000. The PID-controlled flap was able to alleviate the load variations with reductions above 80% for reduced frequencies up to k = 0.028 and nearly 70% at k=0.054. At about 0.108 and higher a different strategy is needed for the present setup as the reduction is low or even negative.
AB - Wind tunnel testing of a two-dimensional aerofoil with a load reducing flap has been conducted under the influence of a closed-loop controller (PID). Upstream synthetic perturbations for well-defined testing of the controller were generated by instrumenting the wind tunnel with two fast turning vanes placed in front of the main test wing. These were situated symmetrically above and below the airfoil in a way that created a fast turning of the air flow without directly affecting the boundary layer on the test airfoil. The Reynolds number was Re=500.000. The PID-controlled flap was able to alleviate the load variations with reductions above 80% for reduced frequencies up to k = 0.028 and nearly 70% at k=0.054. At about 0.108 and higher a different strategy is needed for the present setup as the reduction is low or even negative.
BT - Proceedings of Torque 2012, The science of making torque from wind
T2 - Proceedings of Torque 2012, The science of making torque from wind
ER -