This review addresses the current state of research into active control and suppression of
vortex rope in hydroturbines under off-design operating conditions. Only active control …

We report on the experimental study of a precessing vortex core (PVC) in an air model of a
Francis turbine. The focus is placed on the modal decomposition of the PVC that occurs in …

The flame transfer functions (FTF) is a key quantity to assess the thermoacoustic properties
of combustion systems. It is known to depend on the hydrodynamic instabilities of the …

This study investigates an active control strategy to suppress the precessing vortex core
(PVC) and aims to extend the stable operation range of Francis turbine air model. Large …

The precessing vortex core (PVC) is a helically shaped coherent flow structure that occurs in
reacting and nonreacting swirling flows undergoing vortex breakdown. In swirl-stabilized …

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 …

In this study, we apply periodic flow excitation of the precessing vortex core at the
centerbody of a swirl-stabilized combustor to investigate the impact of the precessing vortex …

This paper presents an active method to control the pressure fluctuations induced by the
rotating vortex rope (RVR) in a Francis hydro turbine model under part load conditions. The …

The reduction of NOx emissions remains a driving factor in the design process of swirl-
stabilized combustion systems, to meet legislative restrictions. In reacting swirl flows …

Swirl flow with the formation of a precessing vortex core (PVC) in a hydro turbine draft tube
model was studied using Stereo-PIV and four acoustic sensors. Experiments were …