Quantitative Mean Flow Measurements Downstream of a Plasma Actuated Grid

DOI

Bibliographic Information

Published
2017-01-05
DOI
  • 10.2514/6.2017-0396
Publisher
American Institute of Aeronautics and Astronautics (AIAA)

Description

This paper presents a study of a plasma actuated grid for mixing improvement and turbulent scale manipulation purpose. The actuator is composed of a perforated plate housing a dielectric barrier discharge in each hole. The objective of this experimental studies primarily concerns qualitativemeasurements of the mean flow field (PIV) developing downstream the grid for baseline and controlled flow conditions. The study is scaled accordingly to the flow velocity passing each hole of the grid, ranging here from 5 to 60 m.s-1. A typical axisymmetric jet forms downstream of the grid and thanks to the actuation, the length of the potential core can be significantly shortened by imposing periodic perturbations at the jet preferred column mode (StD~0.3-0.4). The quantitative measurements presented in this paper confirm that the proposed design can promote, on demand, a higher spreading rate of the region developing downstream the plasma actuated grid, this over the full investigated range of gas flow velocity.

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