@inproceedings{3f4898bb7d4b4fa49b68f6cc335f96ae,
title = "Statistical measurements of fuel mole fraction in scramjet cavity flameholder with a fuel surrogate",
abstract = "Measurements of fuel mole fraction were taken in a model scramjet cavity flameholder using nanosecond-gated laser-induced breakdown spectroscopy with direct spectrum matching. A fuel surrogate, carbon dioxide (CO2), was used to conduct statistical measurements at locations which the laser breakdown initiated sustained combustion in the model scramjet. Verification and calibration testing was performed in a variable pressure combustion chamber to create a direct spectrum matching calibration matrix and confirm the suitability of CO2 as a surrogate for ethylene (C2H4) fuel testing. CO2 was shown to be a good surrogate for ethylene in the scramjet cavity, both in matching fuel/surrogate mole fraction and gas density for conditions with sufficiently high mole fraction. The use of CO2 allowed for statistical measurements of fuel surrogate mole fraction at locations within the cavity that were ignited by the laser spark.",
author = "Brendan McGann and Tonghun Lee and Ombrello, {Timothy M.} and Carter, {Campbell D.} and Hammack, {Stephen D.} and Hyungrok Do",
note = "Funding Information: This work is supported by the Air Force Research Laboratory (AFRL), and the Air Force Office of Scientific Research (AFOSR, FA9550-14-1-0343). Publisher Copyright: {\textcopyright} 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.; AIAA Scitech Forum, 2019 ; Conference date: 07-01-2019 Through 11-01-2019",
year = "2019",
doi = "10.2514/6.2019-1678",
language = "English (US)",
isbn = "9781624105784",
series = "AIAA Scitech 2019 Forum",
publisher = "American Institute of Aeronautics and Astronautics Inc, AIAA",
booktitle = "AIAA Scitech 2019 Forum",
}