3 edition of Interaction of oblique instability waves with weak streamwise vortices found in the catalog.
Interaction of oblique instability waves with weak streamwise vortices
Marvin E. Goldstein
Published
1994
by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C.], [Springfield, Va
.
Written in
Edition Notes
| Statement | Marvin E. Goldstein and David W. Wundrow. |
| Series | NASA technical memorandum -- 106584. |
| Contributions | Wundrow, David W., United States. National Aeronautics and Space Administration. |
| The Physical Object | |
|---|---|
| Format | Microform |
| Pagination | 1 v. |
| ID Numbers | |
| Open Library | OL17682233M |
strain field [11], which can be induced by other nearby vortices or boundaries.t is now terme Id “elliptic instability”, owing to the elliptic streamlines (see figure c) of 4 such strained vortices [13]. In this case, two perturbation waves of the vortex are resonantly coupled with each other through the. Nonlinear instability and chaos in plasma wave-wave interactions. I. Introduction C. S. Kueny and P. J. Morrison Department of Physics and institute for Fusion Studies, The .
Two-layer system of flow through and above vegetation linked by shear flow exhibits periodic oscillations at the interface called the Kelvin-Helmholtz vortices. A dispersion relation for the vortices is derived as a function of flow and vegetation parameters and extended to aside vortices that exist in horizontally stratified flow. TY - JOUR. T1 - On the instability of vortex-wave interaction states. AU - Deguchi, Kengo. AU - Hall, Philip. PY - /9/ Y1 - /9/ N2 - In recent years it has been established that vortex-wave interaction theory forms an asymptotic framework to describe high Reynolds number coherent structures in Cited by:
The physical behavior of the KH instability as well as the triggering and occurrence conditions for highly rolled-up vortices are characterized through several physical parameters, including Alfvén Mach number on the upper side of the layer, the density ratio, and the Cited by: 4. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (K), or click on a page image below to browse page by by: 1.
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Get this from a library. Interaction of oblique instability waves with weak streamwise vortices. [Marvin E Goldstein; David W Wundrow; United States. National Aeronautics and Space Administration.]. 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 flow.
The experiments were aimed at investigating the dynamics of supersonic vortex distortion and to study downstream behavior of a streamwise vortex during a strong shock wave Cited by: Abstract.
Asymptotic methods are used to describe the nonlinear self-interaction between pairs of oblique instability modes that eventually develops when initially linear and spatially growing instability waves evolve downstream in nominally two-dimensional and spanwise periodic laminar boundary : Marvin E.
Goldstein. the interaction between an oblique shock wave and a pair of vortices. We study two typical shock waves of Mach number M s= and M s=, which correspond to two typical shock structures of Mach reflection and regular reflection, respectively, in the problem of shock-vortex interaction.
The. Zhang et al. [21] has studied an oblique shock wave interaction with two vortices at sonic to slightly supersonic flows. Mahesh [22] has also reported an analytical model on the onset of vortex.
Shock Wave Induced Separation Control by Streamwise Vortices Article in Journal of Thermal Science 14(3) September with 26 Reads How we measure 'reads'. @article{osti_, title = {Interaction of a weak shock wave with a discontinuous heavy-gas cylinder}, author = {Wang, Xiansheng and Yang, Dangguo and Wu, Junqiang and Luo, Xisheng}, abstractNote = {The interaction between a cylindrical inhomogeneity and a weak planar shock wave is investigated experimentally and numerically, and special attention is given to the wave patterns and.
SIAM Journal on Applied Mathematics() Interaction of oblique instability waves with weak streamwise vortices. Journal of Fluid Mechanics 1, () Analysis of the interaction of a weak normal shock wave with a turbulent boundary by: Secondary instability in a swept-wing boundary layer was shown that the amount of secondary instability depends on how the primary vortices are generated and on their spanwise spacing.
In Boiko et al. (), it was also noticed that packets of stationary crossflow modes are more unstable as compared to single-mode crossflow vortices. applications shock waves induce separation which often leads to strong unsteady effects.
In this context it is proposed to use streamwise vortices for the interaction control and the results of experiments are presented here. Normal shock wave – boundary layer interaction (SWBLI) is still an important problem in compressible aerodynamics. Tropical instability waves, often abbreviated TIW, are a phenomenon in which the interface between areas of warm and cold sea surface temperatures near the equator form a regular pattern of westward-propagating waves are often present in the Atlantic Ocean, extending westward from the African coast, but are more easily recognizable in the Pacific, extending westward from South America.
Numerical simulations of monochromatic surface waves freely propagating over an initially quiescent flow field are conducted and found to reveal an array of quasi-streamwise vortices of alternating orientation in a manner akin to that of Langmuir circulation beneath wind-driven surface by: 5.
The long-wave instability of short-crested waves, via embedding in the oblique two-wave interaction By THOMAS J. BRIDGESAND FIONA E.
LAINE-PEARSON Department of Mathematics and Statistics, University of Surrey, Guildford, Surrey, GU2 7XH, UK (Received 10 October and.
the shock. The first type is a weak interaction in which the shock is not significantly distorted. The second type is a strong interaction with a regular reflection. The last type is a strong interaction with a Mach reflection.
Corresponding re-gions were divided in. In this study, the spatial growth rates of supersonic streamwise vortices were investigated by inviscid linear stability analysis. The freestream Mach numbers were, and In previous measurements taken to define the streamwise vortices, the stagnation temperature profile of supersonic flows is approximately uniform.
This study found that the growth rate of vortices at the uniform Cited by: We find that the vortices are bent as a whole in a Crow-type ‘displacement’ mode, and, by keeping the primary vortices invisible, we are able to see both sides of the flow simultaneously, showing that the instability perturbations on the secondary vortices are by: Görtler-like vortices (GLVs) are ubiquitous in supersonic flows and have a significant influence on the local flow.
However, the existence of these streamwise vortices in impinging shock wave/turbulent boundary layer interaction (ISTBLI) has been a topic in dispute for by: Numerical simulations of monochromatic surface waves freely propagating over an initially quiescent flow field are conducted and found to reveal an array of quasi-streamwise vortices of alternating orientation in a manner akin to that of Langmuir circulation beneath wind-driven surface waves.
A linear instability analysis of the wave-averaged Cited by: 5. Interaction of submerged vortices with a progressive surface wave is investigated by the finite-difference numerical solution of Navier-Stokes equations.
The progressive wave is the surface gravity water wave in a finite depth. The initial vortex model is Oseen : Linlin Wang, Huiyang Ma. the interaction of waves and currents results in a reduction in the offshore extent of the currents; a delay in the onset of the instability; and an increase of the alongshore shear wave propagation speed.
Most of these effects are minimal in a more turbulent regime with weaker bottom drag, but the offshore extent of the eddy mixing remains File Size: 1MB.
two-dimensional vortices possessing a low-vorticity core surrounded by a high-vorticity annulus. Hurricanes, with their low-vorticity cores (the eye of the storm), are naturally occurring examples of such vortices.
The instability is for asymmetric perturbations of azimuthal wavenumber-one about the vortex, and grows in amplitude. Optical vortices are phase singularities nested in electromagnetic waves that constitute a fascinating source of phenomena in the physics of light and display deep similarities to their close relatives, quantized vortices in superfluids and Bose-Einstein condensates.
We present a brief overview of the major advances in the study of optical vortices in different types of nonlinear media, with Cited by: Pressure wave damping in transonic airfoil flow by means of micro vortex generators.
Since the objective of the μ VG is the interaction with the instability waves, The μ VGs produce a spanwise series of streamwise vortices (streaks). The purpose of these is a premature disintegration of the spanwise Tollmien–Schlichting waves, which Cited by: 4.
