Laser-induced breakdown ignition of low-pressure hydrogen-air premixtures

Pavel P. Popov, Munetake Nishihara, Alessandro Munafò, Jonathan F. Macart, Gregory Elliott, Jonathan B. Freund

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

Abstract

Laser-Induced Breakdown (LIB) ignition of premixed at different equivalence ratios and low pressure is simulated using a high-order (in space and time) numerical algorithm. A neutral chemistry mechanism for combustion is combined with a plasma chemistry mechanism to simulate the LIB ignition over a large time and temperature range. chemiluminescence is estimated using a detailed mechanism for the generation of radicals and a simple one-parameter model for the absorption of chemiluminescence radiation. The effects of lumping of ionized species into their neutral counterparts are examined. It is observed that temperature-preserving lumping yields a good approximation of the fully ionized solution. Good agreement of the flame propagation rate is observed once the flame kernel grows above in radius; the rate of flame propagation is overpredicted for smaller radii. It is observed that the flame is not optically thin. Experimental time histories of chemiluminescence are predicted well, with room for improvement in the absorption model.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-12
Number of pages12
ISBN (Print)9781624105951
DOIs
StatePublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: Jan 6 2020Jan 10 2020

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF

Conference

ConferenceAIAA Scitech Forum, 2020
Country/TerritoryUnited States
CityOrlando
Period1/6/201/10/20

ASJC Scopus subject areas

  • Aerospace Engineering

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