TY - JOUR
T1 - Influence mechanism of jet position parameters on deflagration to detonation transition promoted by transverse jets
AU - Zhang, Zixu
AU - Wang, Zhiwu
AU - Zhang, Yang
AU - Wei, Lisi
AU - Qin, Weifeng
AU - Zhao, Xiaolong
N1 - Publisher Copyright:
© 2025 Elsevier Masson SAS
PY - 2025/10
Y1 - 2025/10
N2 - Transverse jets are an effective approach for promoting deflagration to detonation transition (DDT). To reveal the influence mechanism of jet position on DDT promoted by transverse jets, this study numerically investigated two critical parameters: the distance from the first jet to the left end of the channel (L1) and the axial jet spacing (L2). The simulations were conducted in a straight channel pre-filled with stoichiometric H2/Air mixture, which also served as the jet medium. The results indicate that L1 and L2 primarily govern the DDT process by influencing the evolution of the flame, the first jet along with its upstream clockwise vortex, and the transverse wave. L1 directly controls the timing, mode, and intensity of the action of the first jet along with its upstream clockwise vortex on the initial flame. As L1 decreases, the first jet and the upstream vortex act earlier on the initial flame and exhibit better acceleration effect, thereby facilitating transverse wave formation. Smaller L2 can enhance the interactions of the first jet and the upstream vortex with the flame. Variations in L2 alter the formation mechanism and morphology of the transverse wave, as well as its interaction with the flame. The flame acceleration effect of the transverse wave depends not only on its intensity but also on its position, axial span, and propagation path. Effective coupling between transverse wave propagation and flame development is critical to maximizing the flame acceleration effect of the transverse wave.
AB - Transverse jets are an effective approach for promoting deflagration to detonation transition (DDT). To reveal the influence mechanism of jet position on DDT promoted by transverse jets, this study numerically investigated two critical parameters: the distance from the first jet to the left end of the channel (L1) and the axial jet spacing (L2). The simulations were conducted in a straight channel pre-filled with stoichiometric H2/Air mixture, which also served as the jet medium. The results indicate that L1 and L2 primarily govern the DDT process by influencing the evolution of the flame, the first jet along with its upstream clockwise vortex, and the transverse wave. L1 directly controls the timing, mode, and intensity of the action of the first jet along with its upstream clockwise vortex on the initial flame. As L1 decreases, the first jet and the upstream vortex act earlier on the initial flame and exhibit better acceleration effect, thereby facilitating transverse wave formation. Smaller L2 can enhance the interactions of the first jet and the upstream vortex with the flame. Variations in L2 alter the formation mechanism and morphology of the transverse wave, as well as its interaction with the flame. The flame acceleration effect of the transverse wave depends not only on its intensity but also on its position, axial span, and propagation path. Effective coupling between transverse wave propagation and flame development is critical to maximizing the flame acceleration effect of the transverse wave.
KW - Detonation initiation
KW - Flame acceleration
KW - Jet position parameters
KW - Transverse jets
UR - http://www.scopus.com/inward/record.url?scp=105008671715&partnerID=8YFLogxK
U2 - 10.1016/j.ast.2025.110515
DO - 10.1016/j.ast.2025.110515
M3 - 文章
AN - SCOPUS:105008671715
SN - 1270-9638
VL - 165
JO - Aerospace Science and Technology
JF - Aerospace Science and Technology
M1 - 110515
ER -