Transactions of the Visualization Society of Japan
Online ISSN : 1346-5260
ISSN-L : 1346-5252
Volume 37, Issue 6
Displaying 1-1 of 1 articles from this issue
  • ― Change Vortex Structure of Jet by Burst Actuation ―
    Masato AKIMOTO, Hiroki MATSUMORI, Motoaki KIMURA
    2017Volume 37Issue 6 Pages 21-31
    Published: 2017
    Released on J-STAGE: June 30, 2017
    JOURNAL FREE ACCESS

      In this study, jet control using the coaxial type DBD plasma actuator (=DBD-PA). DBD-PA was driven by burst modulation to control the jet of Reynolds number 1000 ~ 10000. As a result, the phenomenon of lock-in occurred in that the vortex synchronized with the burst modulation drive frequency of the DBD-PA. By driving the DBD-PA with burst modulation, it is possible to generate the axisymmetric vortex at an arbitrary frequency by the phenomenon of lock-in of the jet. In addition, the phenomenon of lock-in arise that two axisymmetric vortices are stably paired and the streamwise vortex grows large. At lower burst modulation drive frequency where the phenomenon of lock-in occurs, separately generated are vortices due to the induced flow of DBD-PA and instability of the shear layer exerted by vortex of induced flow. At higher burst modulation drive frequency where the phenomenon of lock-in occurs, some small fine vortices are scattered.

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