Laser-induced plasma ignition experiments in a direct-connect supersonic combustor at Mach 3

Damiano Baccarella, Gyu Sub Lee, Qili Liu, Gregory S. Elliott, Jonathan B. Freund, Tonghun Lee

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

Abstract

A new direct-connect supersonic combustor has been designed and tested for studies (and corresponding simulation-based predictions) of laser-induced ignition. The new combustor will interface with the ACT-II supersonic combustion tunnel to perform studies on plasma-assisted ignition in an ethylene-fueled supersonic flow. This paper described the combustor design and geometry, the flow characteristics and initial experimental results. The supersonic combustor includes a cavity flame-holder, where ethylene fuel is injected, mixed with entrained air, and ignited. Two injector configurations are included, one horizontal and one vertical, directed in such a way to enhance the cavity flow recirculation. Two different plasma ignition mechanisms were considered, 1) a laser induced plasma (LIP) located at the center of the cavity and 2) a spark plug placed on the bottom surface of the cavity. The diagnostics tools tested to characterize the flow include time-resolved pressure measurements, high-speed schlieren visualization and OH* chemiluminescence visualization, and instantaneous planar laser induced fluorescence (PLIF) of the CH radical.

Original languageEnglish (US)
Title of host publicationAIAA Propulsion and Energy Forum and Exposition, 2019
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105906
DOIs
StatePublished - 2019
EventAIAA Propulsion and Energy Forum and Exposition, 2019 - Indianapolis, United States
Duration: Aug 19 2019Aug 22 2019

Publication series

NameAIAA Propulsion and Energy Forum and Exposition, 2019

Conference

ConferenceAIAA Propulsion and Energy Forum and Exposition, 2019
CountryUnited States
CityIndianapolis
Period8/19/198/22/19

ASJC Scopus subject areas

  • Energy(all)
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Mechanical Engineering

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  • Cite this

    Baccarella, D., Lee, G. S., Liu, Q., Elliott, G. S., Freund, J. B., & Lee, T. (2019). Laser-induced plasma ignition experiments in a direct-connect supersonic combustor at Mach 3. In AIAA Propulsion and Energy Forum and Exposition, 2019 (AIAA Propulsion and Energy Forum and Exposition, 2019). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2019-3926