In this paper, we study the shape and dynamics of helical coherent structures found in the
flow field of an annular swirling jet undergoing vortex breakdown. The flow field is studied by …

Sudden changes of flame shape are an undesired, yet poorly understood feature of swirl
combustors used in gas turbines. The present work studies flame shape transition …

The coupling between fluid strain rate, local flame extinction, hydrodynamic instability, and
flame lift-off was studied in premixed swirl flames using multi-kHz repetition-rate OH …

The transient dynamics of the precessing vortex core (PVC), a globally unstable mode, in an
intermittently shape-transitioning swirl flame is investigated by means of simultaneous OH …

This work investigates the influences of precessing vortex cores (PVCs) on the coherent
interactions in the transient flow and heat release fields of a weak premixed swirling flame …

Abstract About 140 years ago, Lord Kelvin derived the equations describing waves that
travel along the axis of concentrated vortices such as tornadoes. Although Kelvin's vortex …

This work examines the complex flow field in a bistable turbulent swirl flame, where the
flame alternates irregularly between a lifted-off M-shape and an attached V-shape. The flow …

This study investigated the effects of annulus pulsation on the flow characteristics and
mixing properties of double-concentric jets at a low central jet Reynolds number. The central …

This study considers the development and evolution of the swirling turbulent wake and their
link to the turbulence present in the wake. A wake generator produces swirling wakes with a …

This study investigates the role of hydrodynamic instabilities on near-lean blowout (LBO)
flame shapes in a swirl-stabilized spray combustor. Hydrodynamic instabilities often …