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 …

A novel data-driven modal analysis method, reduced-order variational mode decomposition
(RVMD), is proposed, inspired by the Hilbert–Huang transform and variational mode …

The precessing vortex core (PVC) phenomenon in swirling jets is a helical instability in the
flow driven by the coherent precession of the vortex breakdown bubble (VBB) around the …

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 …

Precessing vortex core (PVC), a typical vortex structure, universally exists in swirling flow
fields and originates from the Kelvin–Helmholtz instability of the swirling shear layer. In 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 …

This study introduces the Extended Cluster-based Network Modeling (eCNM), a
methodology to analyze complex fluid flows. The eCNM focuses on characterizing dynamics …

Simultaneous multi-parameter experimental data characterizing the flow-combustion
interaction process are of great significance for understanding the flame instability …

In this work we employ mean field stability theory (MFST) to predict the onset of the
precessing vortex core (PVC) in the draft tube of Francis turbines. MFST is based on the …

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 …