VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University9610.18287/1998-6629-2013-0-2(40)-77-84UnknownStability of swirl flows with radial density gradientAnchikovD. A.<p>Postgraduate Student</p>physics@ssau.ruGusevV. A.<p>Doctor of Education</p>
<p>Professor of the Department of Physics</p>physics@ssau.ruZavershinskiiI. P.<p>Doctor of Physics and Mathematics, Professor</p>
<p>Head of the Department of Physics</p>zav@smr.ruMakaryanV. G.<p>Candidate of Physics and Mathematics</p>
<p>Associate Professor of the Department of Physics</p>physics@ssau.ruSugakS. S.<p>Postgraduate Student</p>physics@ssau.ruSamara State Aerospace University18042013122778428042014Copyright © 2015, VESTNIK of the Samara State Aerospace University2015<p>The stability of an axially symmetrical stationary incompressible swirl flow with radial density jump in relation to infinitesimal spiral perturbations is investigated in the paper The dependences of perturbation frequency and increment on the swirl parameter, axial wave number and density jump are obtained. It is shown that perturbation frequency increases while its increment decreases with the increase in the medium density gradient.</p>Swirl flowdispersioninstabilityЗакрученный потокдисперсиянеустойчивость