Effect of dielectric barrier discharge body forces on hydrogen flames

L. Massa, J. E. Retter, G. S. Elliott, Jonathan Freund

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Recent experiments show that a dielectric-barrier-discharge can fundamentally change the character of a hydrogen diffusion flame, far more so than for a corresponding inert-fluid actuation. The stand burner flame surface deforms from roughly conical to nearly flat, and light emissions increase. We develop a simulation model to analyze the mechanisms that underlie these changes, and reproduce key observations. The main mechanisms are body forces due to charge sheaths, with radicals produced by plasma excitation playing a secondary role for the present conditions. The non-actuated flame flickers at approximately 10 Hz, in good agreement with the experiments. As the DBD voltage is increased, the flame flattens and oscillations decrease, eventually ceasing above a threshold value. In the fully flattened case, the stoichiometric surface lies flat across the fuel orifice, and the flame temperature exceeds the adiabatic flame value. When calibrated against an independent air-only experiments, a linearized plasma sheath for model reproduces the main features of the experiments and provides a good estimate for the thresh-old flattening potential. The model also anticipates faster flowing regimes in which radical production by the plasma is anticipate to become more important.

Original languageEnglish (US)
Title of host publication48th AIAA Plasmadynamics and Lasers Conference, 2017
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104985
StatePublished - Jan 1 2017
Event48th AIAA Plasmadynamics and Lasers Conference, 2017 - Denver, United States
Duration: Jun 5 2017Jun 9 2017

Publication series

Name48th AIAA Plasmadynamics and Lasers Conference, 2017

Other

Other48th AIAA Plasmadynamics and Lasers Conference, 2017
CountryUnited States
CityDenver
Period6/5/176/9/17

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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  • Cite this

    Massa, L., Retter, J. E., Elliott, G. S., & Freund, J. (2017). Effect of dielectric barrier discharge body forces on hydrogen flames. In 48th AIAA Plasmadynamics and Lasers Conference, 2017 (48th AIAA Plasmadynamics and Lasers Conference, 2017). American Institute of Aeronautics and Astronautics Inc, AIAA.