Experiments on Jet/Vortex Interaction

P Margaris, D Marles, I Gursul

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)
129 Downloads (Pure)

Abstract

An experimental study was performed to evaluate the effect of a cold jet on a single trailing vortex. Flow visualization and particle image velocimetry (PIV) measurements were conducted in wind and water tunnels. The main parameters were the ratio of jet-to-vortex strength, the jet-to-vortex distance, the jet inclination angle and the Reynolds number. It was shown that the jet turbulence is wrapped around the vortex and ingested into it. This takes place faster with decreasing jet-to-vortex distance and increasing jet strength. Both time-averaged and instantaneous flow fields showed that the trailing vortex became diffused with its rotational velocity and vorticity levels reduced when the jet is located close to the vortex. The mechanism with which the jet interacts with the vortex is a combination of vortices shed by the jet and the turbulence. No noticeable differences were found within the Reynolds number range tested. The effect of jet on the vortex is delayed when the jet is blowing at an angle to the free stream and away from the vortex such as during take-off.
Original languageEnglish
Pages (from-to)261-278
Number of pages18
JournalExperiments in Fluids
Volume44
Issue number2
DOIs
Publication statusPublished - Feb 2008

Fingerprint Dive into the research topics of 'Experiments on Jet/Vortex Interaction'. Together they form a unique fingerprint.

Cite this