Selected studies around transient vortices, LES, POD, turbulent kinetic energy, entropy production, and pressure pulsation mechanisms.
This study identifies a new large-scale vortex inside the spherical casing, named the rear cavity vortex. Its characteristic frequency is analyzed to support improved efficiency and operational reliability of the NRCP.
Large Eddy Simulation is combined with Proper Orthogonal Decomposition and Turbulent Kinetic Energy analysis to characterize the vortex energy behavior both qualitatively and quantitatively.
This work proposes an enhanced methodology for quantifying energy loss in a newly discovered annular vortex, showing that turbulent entropy production dominates local energy dissipation.
A 3D-LES and time-frequency coupled analysis reveals pressure pulsation and vortex structure mechanisms, showing how coupling strength decays from impeller inlet to outlet through turbulence evolution.