Establishing the controlling parameters of ignition in high-speed flow

Timothy Ombrello, Ez Hassan, Campbell Carter, Brendan McGann, Tonghun Lee, Hyungrok Do, David Peterson, Philip Ivancic, Edward Luke

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

Abstract

An experimental and numerical investigation targeting the establishment of the controlling parameters of ignition in a high-speed reacting flow was performed. Nanosecond-gated Laser-Induced Breakdown Spectroscopy (n-LIBS) was used to quantify fuel concentration at multiple locations within a cavity-based flameholder and validate high-fidelity non-reactive hybrid RANS/LES simulations. The n-LIBS technique simultaneously provided an ignition source and was used along with the simulations to define an a priori ignition probability. The ignition probability based upon fuel concentration at the point of energy deposition provided a reasonable first level comparison to experiments. Inclusion of where the ignition kernel was being transported within the cavity based upon fuel concentration provided improved agreement to experiments. More controlling parameters, such as the velocity and shear at the energy deposition location and along the path taken by the ignition kernel need to be considered to better replicate the experimental results and provide a more robust ignition probability mapping.

Original languageEnglish (US)
Title of host publication54th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103933
StatePublished - Jan 1 2016
Event54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States
Duration: Jan 4 2016Jan 8 2016

Publication series

Name54th AIAA Aerospace Sciences Meeting

Other

Other54th AIAA Aerospace Sciences Meeting, 2016
CountryUnited States
CitySan Diego
Period1/4/161/8/16

ASJC Scopus subject areas

  • Aerospace Engineering

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  • Cite this

    Ombrello, T., Hassan, E., Carter, C., McGann, B., Lee, T., Do, H., Peterson, D., Ivancic, P., & Luke, E. (2016). Establishing the controlling parameters of ignition in high-speed flow. In 54th AIAA Aerospace Sciences Meeting (54th AIAA Aerospace Sciences Meeting). American Institute of Aeronautics and Astronautics Inc, AIAA.