Journal ArticleDOI
Computational Study of the Flowfields Associated with Oblique Shock/Vortex Interactions
Ashish Nedungadi,Mark J. Lewis +1 more
TLDR
In this paper, the interaction between a supersonic streamwise vortex and an oblique shock is solved numerically using the unsteady, three-dimensional Euler equations.Abstract:
The interaction between a supersonic streamwise vortex and an oblique shock is solved numerically using the unsteady, three-dimensional Euler equations. The parametric study ascertains the effects of vortex strength, streamwise velocity deficit, and Mach number on the oblique shock/vortex interaction. The vortex, whose tangential and streamwise velocities are analytically modeled, is introduced upstream of the shock and allowed to interact with the shock. The interaction is examined at freestream Mach numbers of 3 and 5, using vortices of varying strength and possessing various velocity deficits. Three distinct types of interactions—weak, moderate, and strong—are observed, depending very strongly on the streamwise velocity deficit and, to a lesser degree, on the strength of the vortex. The weak interaction is characterized by a slight distortion of the shock and vortex with the resulting flowfield being supersonic everywhere. The moderate interaction, however, results in a more pronounced distortion of the shock, creating a small pocket of subsonic flow downstream of the interaction. In addition, the incident vortex is highly distorted by the shock and eventually splits up into two counter-rotating vortices. In the strong interaction, due to the formation of a large subsonic region, a dramatic reorganization of the original shock occurs, accompanied by a region of reversed subsonic flow, a stagnation point, and a drastic expansion of the vortex core, all of which are characteristics of vortex breakdown.read more
Citations
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Journal ArticleDOI
Aspects of shock wave-induced vortex breakdown
TL;DR: In this article, the authors discuss supersonic vortex breakdown when sufficiently strong streamwise vortices encounter otherwise planar, normal and oblique shock fronts as well as solid surfaces placed in their passages.
Journal ArticleDOI
Jet Interaction with a Primary Jet and an Array of Smaller Jets
TL;DR: In this paper, a combined experimental-numerical study of the jet interaction flowfield associated with sonic injection of a gas into a turbulent, high-speed crossflow (M=4.0) was conducted with an innovative configuration for jet-thruster applications.
Journal ArticleDOI
Numerical modeling of vortex/shock wave interaction and its transformation by localized energy deposition
TL;DR: In this paper, three-dimensional unsteady Euler simulations are presented for the interaction of a streamwise vortex with an oblique shock of angle β = 23.3° at Mach 3 and 5.
Journal ArticleDOI
Some aspects of streamwise vortex behavior during oblique shock wave/vortex interaction
TL;DR: In this paper, an experimental study of the flowfield generated by the interaction of a streamwise vortex having a strong wake-type axial Mach number profile and a two-dimensional oblique shock wave was conducted in a Mach 2.49 flow.
Journal ArticleDOI
Criterion for vortex breakdown on shock wave and streamwise vortex interactions.
TL;DR: In numerical simulations, vortex breakdown appeared under conditions of multiple pressure increases and the helicity disappeared behind the oblique shock wave along the line of the vortex center, consistent with the predicted breakdown condition at Mach numbers 2.0 and 3.0.
References
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