Parametric study of Ns-DBD plasma actuators in a turbulent mixing layer

Ashish Singh, Jesse Little

Research output: Contribution to journalArticle

Abstract

Abstract: Excitation of a low-speed turbulent mixing layer using nanosecond dielectric barrier discharge (ns-DBD) plasma actuators is demonstrated here under various forcing conditions. The mixing layer behavior downstream is examined in the context of observations near the point of actuation (splitter plate trailing edge). Parameters explored include carrier/burst frequency, pulse energy, and duty cycle. Control authority is found to increase with carrier frequency, but a reduction in efficacy is observed for high pulse energy and lower duty cycle. During actuation, a streamwise velocity deficit is found near the trailing edge relative to the baseline. This causes velocity fluctuations that are amplified and lead to the formation of large-scale structures. The results indicate ns-DBD plasma actuators in burst mode acts as an obstruction giving rise to cross-stream perturbations that cause mixing layer growth. Graphic abstract: [Figure not available: see fulltext.].

Original languageEnglish (US)
Article number36
JournalExperiments in Fluids
Volume61
Issue number2
DOIs
StatePublished - Feb 1 2020

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turbulent mixing
Actuators
trailing edges
actuators
Plasmas
actuation
plasma jets
bursts
cycles
causes
carrier frequencies
pulses
low speed
perturbation
energy
excitation

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

Cite this

Parametric study of Ns-DBD plasma actuators in a turbulent mixing layer. / Singh, Ashish; Little, Jesse.

In: Experiments in Fluids, Vol. 61, No. 2, 36, 01.02.2020.

Research output: Contribution to journalArticle

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