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Journal of Applied Mechanics and Technical Physics

2025 year, number 1

Transverse and Longitudinal Vortices in Free Subsonic Axisymmetric Jets

V. G. Pimshtein
Zhukovsky Central Aerohydrodynamic Institute, Moscow, Russia
Keywords: subsonic jet, longitudinal vortices, Kelvin-Helmholtz vortices

Abstract

The occurrence of longitudinal and transverse vortices in a subsonic air jet and in an air jet with added helium due to the natural instability of the flow is shown using a high-resolution direct shadow method.