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 …

This study investigated the performance of proper orthogonal decomposition (POD), discrete
Fourier transformation (DFT), time-domain spectral proper orthogonal decomposition (td …

We propose a novel nonlinear manifold learning from snapshot data and demonstrate its
superiority over proper orthogonal decomposition (POD) for shedding-dominated shear …

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 …

The precessing vortex core (PVC) is a coherent structure that can arise in swirling jets from a
global instability. In this work, the PVC is investigated under highly turbulent conditions. The …

Direct numerical simulation is used to study unconfined coaxial jets under the influence of
strong swirl imparted to the outer jet. Spectral proper orthogonal decomposition is employed …

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 …

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 study discusses a general framework to identify the unsteady features of a flow past an
oscillating aerofoil in deep dynamic stall conditions. In particular, the work aims at …

Fluidic actuators are designed to control the oscillatory helical mode, called a precessing
vortex core (PVC), which is often observed in gas turbine combustors. The PVC induces …