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Flow and noise predictions for the tandem cylinder aeroacoustic benchmarka)
a)Presented in preliminary form as AIAA Paper 2011-2824, 17th AIAA-CEAS Aeroacoustics Conference, Portland, Oregon, 5–8 June 2011.
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10.1063/1.3685102
/content/aip/journal/pof2/24/3/10.1063/1.3685102
http://aip.metastore.ingenta.com/content/aip/journal/pof2/24/3/10.1063/1.3685102

Figures

Image of FIG. 1.
FIG. 1.

Tandem cylinder setup for the QFF configuration.

Image of FIG. 2.
FIG. 2.

Grid resolution near the cylinders for the LBM QFF setup. Dashed line (purple online): spanwise end plates; rectangular boxes (blue, green, and black online): permeable FW-H surfaces.

Image of FIG. 3.
FIG. 3.

Time history of lift C L (— red online) and drag C D ( blue online) coefficients for the LBM periodic (top) and LBM QFF (bottom) simulations.

Image of FIG. 4.
FIG. 4.

Time average of the surface pressure coefficient for BART (∘) and QFF (□) experiments, and for LBM periodic ( blue online) and LBM QFF (—) simulations.

Image of FIG. 5.
FIG. 5.

rms of the surface pressure coefficient for BART (∘) and QFF (□) experiments, and for LBM periodic ( blue online) and LBM QFF (—) simulations.

Image of FIG. 6.
FIG. 6.

Spanwise correlation of the surface pressure at θ = 135° for BART (∘) and QFF (□) experiments, and for LBM periodic ( blue online) and LBM QFF (—) simulations.

Image of FIG. 7.
FIG. 7.

Surface pressure spectra at five different azimuthal angles for BART (∘) and QFF (–□–) experiments, and for LBM periodic ( blue online) and LBM QFF (—-) simulations.

Image of FIG. 8.
FIG. 8.

Contours of instantaneous density ρ/ρ0 in the cross section plane y/D = 0.

Image of FIG. 9.
FIG. 9.

Contours of instantaneous spanwise vorticity ω z D/U 0 in the mid-section plane z/D = 0.

Image of FIG. 10.
FIG. 10.

Mean streamwise velocity along y/D = 0 line from PIV (∘) in BART experiment, and for LBM periodic ( blue online) and LBM QFF (—) simulations. The shorter (red online) curve in (b) corresponds to the “zoomed” PIV data.

Image of FIG. 11.
FIG. 11.

Contours of mean two-dimensional turbulent kinetic energy in the mid-section plane z/D = 0 from BART experiment (top row), and LBM periodic (middle row) and LBM QFF (bottom row) simulations: (a) gap between cylinders; (b) downstream of rear cylinder.

Image of FIG. 12.
FIG. 12.

Mean two-dimensional turbulent kinetic energy for BART experiment (∘), and for LBM periodic ( blue online) and LBM QFF (—) simulations: in the gap between the cylinders along y/D = 0 in (a), and along x/D = 1.5 in (b); at the rear of the downstream cylinder along y/D = 0 in (c), and along x/D = 4.45 in (d).

Image of FIG. 13.
FIG. 13.

PSD of the radiated noise for the QFF experiment (–□–), and for the FW-H solver with input (cylinder surfaces only) from the LBM periodic ( blue online) and LBM QFF (—-) simulations.

Image of FIG. 14.
FIG. 14.

Radiated noise predicted from the solid FW-H formulation with (—) and without (—-) the spanwise side plates as input (LBM QFF simulation only), and from the QFF experiment (–□–; □).

Image of FIG. 15.
FIG. 15.

Contours of the 1/3 octave band SPL (dB) of the surface pressure on both cylinders and on the spanwise side plates, from the LBM QFF simulation.

Image of FIG. 16.
FIG. 16.

Radiated noise predicted from the permeable FW-H formulation with surface Box1 (—-), Box2 (• • •) and Box3 (—) as input (LBM QFF simulation only), and from the QFF experiment (–□–; □).

Image of FIG. 17.
FIG. 17.

Contours of the 1/3 octave band SPL (dB) of the pressure on the permeable surface Box3, from the LBM QFF simulation.

Tables

Generic image for table
Table I.

Summary of flow parameters and comparison of results between the two LBM simulations and experiment.

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/content/aip/journal/pof2/24/3/10.1063/1.3685102
2012-03-02
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Flow and noise predictions for the tandem cylinder aeroacoustic benchmarka)
http://aip.metastore.ingenta.com/content/aip/journal/pof2/24/3/10.1063/1.3685102
10.1063/1.3685102
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