DOI: 10.1615/ICHMT.2015.THMT-15
ISBN Print: 978-1-56700-427-4
ISBN CD: 978-1-56700-428-8
Turbulent structures in a temporally evolving swirling jet
RÉSUMÉ
Swirling jets have numerous applications in industry. A better understanding of the generation and evolution of turbulent structures in jet flows is useful for engineering and theoretical reasons. This work is concerned with the physical analysis of a swirling jet by means of three-dimensional simulations using a pseudo-spectral method. The detailed structures of the flow could be visualized and the mechanisms leading to their formation and evolution are elucidated. A comparison between a swirling and so-called "natural" jet were carried out. The possibility of controlling the jet evolution by prescribing different perturbations to the initial conditions was assessed. The proximity of the inertial region to the inclination of -5/3 and the decay region were verified in the energy spectra.