We study the emergence of precessing vortex core (PVC) oscillations in a swirling jet
experiment. We vary the swirl intensity while keeping the net mass flow rate fixed using a …

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 …

This paper presents 5 kHz stereo particle image velocimetry and OH planar laser induced
fluorescence measurements of transversely forced swirl flames. The presence of transverse …

Swirling jets are canonical flow fields used to stabilize flames in many gas-turbine
combustion systems. These flows amplify background acoustic disturbances and perturb the …

A comparison study with a cartesian, three-dimensional reacting base flow is also performed
where the base-flow varies spatially in three-dimensions. The study utilizes a stable, high …

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 …

Hydrodynamic instability in lean premixed gas turbine combustors can cause coherent flow
velocity oscillations. These can in turn drive heat release oscillations that when favorably …