TY - GEN
T1 - NO effects on detonation formation in npentane/air mixtures with temperature gradients
AU - Zhang, Tianhan
AU - Ju, Yiguang
N1 - Funding Information:
The authors would like to thank the grant support from the Army Research Office with grant numbers W911NF-16-1-0076 and W911NF1920127.
Publisher Copyright:
© 2021, American Institute of Aeronautics and Astronautics Inc, AIAA. All Rights Reserved.
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
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U2 - 10.2514/6.2021-0288
DO - 10.2514/6.2021-0288
M3 - Conference contribution
AN - SCOPUS:85100289279
SN - 9781624106095
T3 - AIAA Scitech 2021 Forum
SP - 1
EP - 4
BT - AIAA Scitech 2021 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
Y2 - 11 January 2021 through 15 January 2021
ER -