Active open-loop control of particle dispersion in round jets

Ellen K. Longmire, John K. Eaton

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


The objective of this study was to perturb vortex ring structures forming in the near field of a round air jet to modify the dispersion of solid particles in the flow. A jet with Reynolds number based on exit diameter of 1.9 ×104 was loaded with 55-μ diameter glass beads and forced axially with an acoustic speaker. Forcing waveforms were either single or double frequency. Results from flow visualization, laser Doppler anemometry, and quantitative mapping of particle number density show that significant modifications to local particle concentration and dispersion could be achieved.

Original languageEnglish (US)
Pages (from-to)555-563
Number of pages9
JournalAIAA journal
Issue number3
StatePublished - Mar 1994

Bibliographical note

Funding Information:
This work was funded by the Electric Power Research Institute under Contract RP 8005-2 monitored by George Offen. The first author was supported by fellowships from the Link Foundation and the American Association of University Women.


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