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Effect of Volume Energy Supply on the Stability of a Subsonic Vortex Flow

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Abstract

Calculations of the stability of an axisymmetric vortex flow of viscous heat-conducting gas with volume energy supply are presented. The unperturbed axisymmetric vortex flow was found numerically using a quasi-cylindrical approximation of the Navier-Stokes equations under the assumption of constant peripheral-velocity circulation in the ambient co-current flow. The volume energy supply in the viscous vortex core was modeled by an additional source term in the energy equation. The stability characteristics of the viscous vortex flow in a longitudinal vortex with respect to both axisymmetric and non-axisymmetric three-dimensional waves traveling along the vortex axis and corresponding to both positive and negative values of the azimuthal wave number were found using the time-dependent formulation of the linear stability theory for compressible three-dimensional plane-parallel flows.

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  1. A.V. Kazakov
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Kazakov, A. Effect of Volume Energy Supply on the Stability of a Subsonic Vortex Flow. Fluid Dynamics 38, 552–560 (2003). https://doi.org/10.1023/A:1026321811200

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