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.
|State||Published - 1997|
|Event||28th Fluid Dynamics Conference, 1997 - Snowmass Village, United States|
Duration: Jun 29 1997 → Jul 2 1997
|Conference||28th Fluid Dynamics Conference, 1997|
|Period||06/29/97 → 07/2/97|