Manipulation of a grid-generated mixing with an active honeycomb dielectric barrier plasma discharge

N. Benard (1) , A. Mizuno (2) , E. Moreau (1)

1 PPrime [Poitiers] - Institut Pprime [UPR 3346]
2 TUT - Toyohashi University of Technology

This study defines and characterizes an active system for turbulent and scalar mixing enhancement. This system is made of an active grid composed of 121 holes where the gas flows. A high voltage is applied between printed electrodes and embedded ground electrodes in order to produce a non-thermal surface discharge at the hole exits. The goal is to modify the flow downstream of the active grid. First, electrical and optical characterizations of the actuator are proposed. Second, it is shown that the discharge strongly modifies the flow distribution of the multi-jet exhaust, and the flow change depends on the high voltage applied to the active plasma grid. A minimization of the potential core by 40% is reported when discharge frequency corresponds to jet column mode instability. Research funded by the French Government Program “Investissements d'Avenir” (LABEX INTERACTIFS, reference ANR-11-LABX-0017-01) and conducted under DGA and ANR supervision (INOPLAS, ANR-13-ASTR-0015-01). This work was partly supported by a Grant-in-Aid for Scientific Research (KAKENHI 24108005) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. The authors are also grateful for Kyocera Co.

Mots clés: active honeycomb; dielectric barrier plasma discharge

Domaines: Sciences de l'ingénieur [physics]

N. Benard, A. Mizuno, E. Moreau. Manipulation of a grid-generated mixing with an active honeycomb dielectric barrier plasma discharge. Applied Physics Letters, 2015, 107 (23), pp.233508. ⟨10.1063/1.4937406⟩. ⟨hal-03636773⟩