Time resolved two-dimensional particle image velocimetry (2DPIV) experiments have been conducted to contribute to the understanding of the physics governing the suppression mechanism of cavity flow self-sustained oscillations by means of high frequency excitation of the cavity shear layer. High frequency excitation was introduced by the spanwise coherent vortex shedding in the wake of a cylindrical rod positioned just upstream the cavity entrance, at the edge of the incoming boundary layer. The effectiveness of this suppression was demonstrated for a cavity having the length-to-depth ratio equal to three, in incompressible flow. The spatial and time resolved PIV measurements of the whole flow field in the plane normal to the cavity floor, linear stability analysis of the measured shear layer mean velocity profiles, and preliminary PIV measurements in a plane parallel to the cavity allowed us to offer a better insight into the involved physical mechanisms in suppressing cavity self-sustained oscillations.
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May 2012
Fundamental Issues And Canonical Flows
Control of Cavity Flow Oscillations by High Frequency Forcing
M. A. Martinez,
M. A. Martinez
DIASP, Politecnico di Torino,Corso Duca degli Abruzzi, 24
, 10129 Torino, Italy
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G. M. Di Cicca,
G. M. Di Cicca
DIASP, Politecnico di Torino,Corso Duca degli Abruzzi, 24
, 10129 Torino, Italy
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M. Iovieno,
M. Iovieno
DIASP, Politecnico di Torino,Corso Duca degli Abruzzi, 24
, 10129 Torino, Italy
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M. Onorato
M. Onorato
DIASP, Politecnico di Torino,Corso Duca degli Abruzzi, 24
, 10129 Torino, Italy
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M. A. Martinez
DIASP, Politecnico di Torino,Corso Duca degli Abruzzi, 24
, 10129 Torino, Italy
G. M. Di Cicca
DIASP, Politecnico di Torino,Corso Duca degli Abruzzi, 24
, 10129 Torino, Italy
M. Iovieno
DIASP, Politecnico di Torino,Corso Duca degli Abruzzi, 24
, 10129 Torino, Italy
M. Onorato
DIASP, Politecnico di Torino,Corso Duca degli Abruzzi, 24
, 10129 Torino, Italy
J. Fluids Eng. May 2012, 134(5): 051201 (11 pages)
Published Online: May 7, 2012
Article history
Received:
July 29, 2011
Revised:
March 22, 2012
Published:
May 3, 2012
Online:
May 7, 2012
Citation
Martinez, M. A., Di Cicca, G. M., Iovieno, M., and Onorato, M. (May 7, 2012). "Control of Cavity Flow Oscillations by High Frequency Forcing." ASME. J. Fluids Eng. May 2012; 134(5): 051201. https://doi.org/10.1115/1.4006468
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