V.V.Babenko, V.A.Blohin, A.V.Voskoboinick, V.N.Turick Velocity fluctuations in swirling jet of a vortex chamber |
Acoustic bulletin, Vol. 5 ¹ 1, (2002) |
| The experimental reseach results of distribution of a longitudinal and transversal power spectral density components of a turbulent wall jet velocity fluctuations in the vortical chamber are shown. The contribution of various frequency components of the spectral densities to general energy of velocity fluctuation field is represented at a variation of a jet entering tangential angles in the chamber, azimuth angles and at various normal distances from a cylindrical wall flowed by the stream. The swirling stream core is more saturated by small-scale high-frequency vortices in comparison with the wall jet field where the large-scale vortical systems are prevalent. With the increase of azimuth angle there is the longitudinal vortices scales enlargement in the wall jet field and their contribution in the fluctuating energy grows. |
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KEY WORDS: the vortex chamber, swirl jet, the scale of the vortex system, the energy of the pressure fluctuations |
| TEXT LANGUAGE: Russian |