| Abstract: | The results of an experimental investigation of sound generation by the interacting toroidal and oblique vortices formed in
a subsonic turbulent jet under the action of saw-tooth finite-amplitude sound waves with simultaneous longitudinal internal
and transverse external excitation are presented (the sound pressure level on the jet edge is 165–175 dB). The direct schlieren
method with an exposure time −3·10−7 s was employed. This made it possible to visualize not only the jet and the vortices formed in it but also the sound waves.
It was confirmed experimentally that the vortex interaction may be accompanied by sound generation of fairly high intensity.
Moscow. Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 1, pp. 54–60, January–February,
2000. |
