INVESTIGADORES
ARTANA Guillermo Osvaldo
artículos
Título:
Mean lift generation on cylinders induced with plasma actuators
Autor/es:
R SOSA; G ARTANA; N BÉNARD; E MOREAU
Revista:
EXPERIMENTS IN FLUIDS
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2011 vol. 51 p. 853 - 860
ISSN:
0723-4864
Resumen:
Bluff body flow control based on plasma
actuators requires suitable strategies to attain the desired
objectives. The strategy selection becomes more critical
in situations where the free airstream velocity is much
higher than the maximum velocity that can be produced by
the flow control device. In this work, we report recent
efforts to produce on a circular cylinder forces in direction
transverse to the free flow. Free stream velocities considered
in this work are as high as 45 m/s ((Re(O) 1 9 105),
which result much higher values than the maximum
velocities (about 5 m/s) usually induced by the kind of
plasma actuator here considered (dielectric barrier type).
Our strategy consisted on promoting asymmetries on
boundary layer separation with a four electrode arrangement.
In our experiments, we measured drag and lift forces
and explored the effect of exciting the flow with steady and
non-steady actuations. The device demonstrated authority
to induce significant transverse forces and optimal frequencies
resulted in all cases close to the vortex shedding
frequency.Re(O) 1 9 105),
which result much higher values than the maximum
velocities (about 5 m/s) usually induced by the kind of
plasma actuator here considered (dielectric barrier type).
Our strategy consisted on promoting asymmetries on
boundary layer separation with a four electrode arrangement.
In our experiments, we measured drag and lift forces
and explored the effect of exciting the flow with steady and
non-steady actuations. The device demonstrated authority
to induce significant transverse forces and optimal frequencies
resulted in all cases close to the vortex shedding
frequency.