1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Sound generated by vortices in the presence of a porous half-cylinder mounted on a rigid plane
Rent:
Rent this article for
USD
10.1121/1.2171838
/content/asa/journal/jasa/119/4/10.1121/1.2171838
http://aip.metastore.ingenta.com/content/asa/journal/jasa/119/4/10.1121/1.2171838

Figures

Image of FIG. 1.
FIG. 1.

Schematics of vortex model and nomenclatures: (a) Original plane and (b) plane.

Image of FIG. 2.
FIG. 2.

Effect of pressure-releasing surface on vortex motion and sound generation: (a) Vortex path and (b) sound pressure. Initial . : ; - - -: ; — — —: ; and ——: Rigid cylinder.

Image of FIG. 3.
FIG. 3.

Combined effects of effective fluid density and flow resistance on the vortex path. (a) ; : ; - - -: ; : ; — — —: ; and ——: Rigid cylinder. (b) ; : ; : ; - - -: ; — — —: ; and ——: Rigid cylinder. (c) . : ; - - -: ; : ; — — —: ; and ——: Rigid cylinder. Initial location of the vortex at with initial .

Image of FIG. 4.
FIG. 4.

Sound pressure time variation for at different : (a) Longitudinal dipole and (b) transverse dipole. : ; - - - -: ; — — —: ; and ——: Rigid cylinder.

Image of FIG. 5.
FIG. 5.

Combined effects of effective fluid density, flow resistance, and initial vortex height on radiated sound amplitude: (a) ; (b) ; and (c) . : for , ; : for , ; — — —: for , ; and ——: Rigid cylinder. : ; : ; and : . Closed symbols for ; open symbols for .

Image of FIG. 6.
FIG. 6.

Combined effects of effective fluid density, flow resistance, and initial vortex height on acoustical energy radiation: (a) ; (b) ; and (c) . : for , ; : for , ; — — —: for , ; and ——: Rigid cylinder. : ; : ; and : .

Image of FIG. 7.
FIG. 7.

Time variation of far-field directivity: (a) ; (b) ; (c) ; and (d) . Initial , and . — — —: negative sound pressure; ——: positive sound pressure.

Image of FIG. 8.
FIG. 8.

Unsteady leapfrogging motions of two identical vortices near a rigid cylinder: (a) ; (b) ; (c) ; and (d) . Initial , . — — —: ; : ; ——: ; - - - -: relative to at or ; and : relative to at .

Image of FIG. 9.
FIG. 9.

Time variation of longitudinal dipole magnitude at different separation distance in the presence of a rigid cylinder: (a) ; (b) ; and (c) . ——: Equivalent single vortex results; and : Two interacting identical vortices results. initially at , .

Image of FIG. 10.
FIG. 10.

Paths of two interacting vortices for perfectly inviscid fluid cases: (a) , ; (b) , ; and (c) , . initially at , . — — —: ; : ; and ——: .

Image of FIG. 11.
FIG. 11.

Combined effects of effective fluid density and flow resistance on the vortex paths: (a) , ; (b) , ; (c) , ; and (d) , . Initial , initial , , . — — —: ; : ; and ——: .

Image of FIG. 12.
FIG. 12.

Examples of time variation of dipole magnitudes at finite effective fluid density and flow resistance: (a) , ; (b) , ; (c) , ; and (d) , . : ; — — —: ; and ——: . Initial , .

Image of FIG. 13.
FIG. 13.

Amplitudes of the dipoles produced by two interacting identical vortices: (a) ; (b) ; and (c) . Initial , . Legends: Same as those in Fig. 5 .

Image of FIG. 14.
FIG. 14.

Acoustical energy radiated by two interacting identical vortices: (a) ; (b) ; and (c) . Initial , . Legends: Same as those in Fig. 6 .

Tables

Generic image for table
TABLE I.

Ranges of parameters in practical and experimental flows.

Loading

Article metrics loading...

/content/asa/journal/jasa/119/4/10.1121/1.2171838
2006-04-01
2014-04-23
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Sound generated by vortices in the presence of a porous half-cylinder mounted on a rigid plane
http://aip.metastore.ingenta.com/content/asa/journal/jasa/119/4/10.1121/1.2171838
10.1121/1.2171838
SEARCH_EXPAND_ITEM