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Acoustical Physics

, Volume 64, Issue 2, pp 144–149 | Cite as

Radiative Instability of an Unbounded Jet Flow

  • M. V. Kalashnik
Classical Problems of Linear Acoustics and Wave Theory
  • 25 Downloads

Abstract

The problem of the linear dynamics of disturbances of an unbounded jet flow with a piecewise linear velocity profile is considered. The stable disturbances of a flow in an incompressible medium are so-called flow waves localized near a vorticity jump. In this work, it is shown that the amplitudes of these waves slowly increase in a compressible medium due to acoustic radiation; i.e., an instability appears. The asymptotic solution to the problem for small Mach numbers is represented in terms of Airy functions. An analytic expression for the growth increment of the disturbances is obtained.

Keywords

acoustic radiation radiative instability jet flow acoustic and internal gravity waves 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.Obukhov Institute of Atmospheric PhysicsRussian Academy of SciencesMoscowRussia
  2. 2.Typhoon Research and Production AssociationObninskRussia

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