A model of turbulent vortex breakdown

Vladimir Shtern, Miguel Herrada, Fazle Hussain

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We develop a theory of turbulent vortex breakdown to predict hysteretic jumps in recirculatory zones over delta wings and to explain recent experimental observations of conical vortex breakdown. Our approach involves (a) modeling of swirling jets by conically similar solutions of the Navier-Stokes equations, (b) modeling of turbulence by an eddy viscosity which is represented by a step function of the polar angle and (c) matching solutions for the turbulent and laminar flow regions. The model shows the formation of a conical turbulent wake which develops without a recirculatory zone. Also, the range of flow parameters increases when no jump occurs.

Original languageEnglish (US)
Title of host publication28th Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9780000000002
StatePublished - 1997
Event28th Fluid Dynamics Conference, 1997 - Snowmass Village, United States
Duration: Jun 29 1997Jul 2 1997

Other

Other28th Fluid Dynamics Conference, 1997
CountryUnited States
CitySnowmass Village
Period6/29/977/2/97

ASJC Scopus subject areas

  • Engineering(all)

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