NO effects on detonation formation in npentane/air mixtures with temperature gradients

Tianhan Zhang, Yiguang Ju

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

Abstract

The effect of NO addition on detonation initiation in the negative temperature coefficient (NTC) region for thermally stratified n-pentane/air mixtures is numerically modeled with detailed chemistry and transport. The emphasis of this paper is understanding how to control detonation initiation by altering its low-temperature reaction pathways with NO addition. It is found that in the NTC region, NO addition causes the temperature gradients of the 1st and 2nd ignition delay times to become countercurrent, which leads to detonation formation occurring in the negative normalized gradient area. This abnormal phenomenon is mainly attributed to the coupling between the countercurrent temperature gradients and the NTC effect. The current study advances the understanding of low-temperature chemistry in detonation formation and provides a novel concept to control detonation initiation in engines by adding chemically sensitive species.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-4
Number of pages4
ISBN (Print)9781624106095
DOIs
StatePublished - 2021
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: Jan 11 2021Jan 15 2021

Publication series

NameAIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period1/11/211/15/21

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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