The purpose of this paper is to characterize and model waves that are observed within the potential core of subsonic jets and that have been previously detected as tones in the near-nozzle region. Using three models (the linearized Euler equations, a cylindrical vortex sheet, and a cylindrical duct with pressure release boundary conditions), we show that these waves can be described by linear m...

Centrally staged swirl combustion can effectively reduce NO x emission. However, the complex field is susceptible to producing large-scale coherent structures, such as precessing vortex core and central (CVC). This study mainly investigates effect of CVC on flow flame in a centrally spray combustor at elevated temperature pressure using 10 kHz high-speed CH * chemiluminescence (CL), 20 particle...

We study quantum vortex states consisting of a ring vortices with alternating sign, in homogeneous superfluid confined to circular domain. find an exact stationary solution the point model for neutral necklace. investigate stability necklace state within both point-vortex and Gross-Pitaevskii equation describing trapped atomic Bose-Einstein condensate at low temperature. The are found also be p...

We consider the evolution of an isolated anticyclonic vortex encountering a continental shelf during its westward β-drift in the framework of an equivalentbarotropic model generalized to allow for the intersection of the layer interface with a sloping bottom. The approaching vortex generates both topographic coastally trapped waves, and secondary cyclonic eddies due to off-shelf advection of wa...