Study on the low-temperature chemistry and Heat Release Rate of High-pressure Diethyl Ether diffusion Cool Flame

Andy Thawko, Ziyu Wang, Takaki Akiba, Bowen Mei, Yiguang Ju

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

Abstract

Pressure is an important parameter for cool flames, and it has a significant effect on the low-temperature chemistry and HRR. The pressure effect on diffusion cool flame of diethy lether is studied both experimentally and numerically in this work. Higher pressure significantly increases the cool flame extinction limits, highlighting a substantial impact on low-temperature chemistry. The pressure, P, and strain rate, a, correlate with the cool flame heat release rate, Q, as Q ~ √ap P, which is different from the known hot flames correlation, Q ~ √ap. Kinetic analysis shows that pressure increase stabilizes QOOH and promotes the second O2 addition to QOOH. Thus, multiple OH radicals are produced in this chain branching pathway, rather than one OH in QOOH decomposition, resulting in a low temperature reactivity increase. Both experiment and numerical modeling show that increasing pressure enhances the low-temperature chemistry.

Original languageEnglish (US)
Title of host publicationAIAA SciTech Forum and Exposition, 2024
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624107115
DOIs
StatePublished - 2024
Externally publishedYes
EventAIAA SciTech Forum and Exposition, 2024 - Orlando, United States
Duration: Jan 8 2024Jan 12 2024

Publication series

NameAIAA SciTech Forum and Exposition, 2024

Conference

ConferenceAIAA SciTech Forum and Exposition, 2024
Country/TerritoryUnited States
CityOrlando
Period1/8/241/12/24

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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