TY - GEN
T1 - Characterization of detonation re-initiation mode in a flat channel with a pre-detonator using chemiluminescence imaging at 200 kHz
AU - He, Jiannan
AU - Lei, Qingchun
AU - Zhen, Jiawei
AU - Chi, Yeqing
AU - Fan, Wei
N1 - Publisher Copyright:
© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2018
Y1 - 2018
N2 - The use of a pre-detonator connected to a main chamber is demonstrated to provide reliable and fast detonation to the denotation engines (i.e., pulse detonation engines or rotating detonation engines). One key issue is that the overdriven detonation (OD) occurred in the pre-detonator significantly affects the denotation re-initiation mode in the main chamber. To address this issue, this work reports an experimental study to characterize the detonation re-initiation mode in a flat channel with different OD conditions in the pre-detonator. For this purpose, detonation was first triggered in a smooth pre-detonator and then propagated into the following channel to ignite the downstream mixtures. The chemiluminescence signals generated in both the pre-detonator and the main chamber were captured by the high-speed camera operated at 200 kHz, which is sufficient to capture the detailed dynamic transitions and the wave structures. The results showed that the probability of a fast denotation re-initiation in the chamber increases as the distance between the OD occurring location and the pre-detonator’s outlet decreases. Based on the results, this work suggests a critical condition for the fast detonation re-initiation, which is expected to provide significant guidance to the design of the denotation engines.
AB - The use of a pre-detonator connected to a main chamber is demonstrated to provide reliable and fast detonation to the denotation engines (i.e., pulse detonation engines or rotating detonation engines). One key issue is that the overdriven detonation (OD) occurred in the pre-detonator significantly affects the denotation re-initiation mode in the main chamber. To address this issue, this work reports an experimental study to characterize the detonation re-initiation mode in a flat channel with different OD conditions in the pre-detonator. For this purpose, detonation was first triggered in a smooth pre-detonator and then propagated into the following channel to ignite the downstream mixtures. The chemiluminescence signals generated in both the pre-detonator and the main chamber were captured by the high-speed camera operated at 200 kHz, which is sufficient to capture the detailed dynamic transitions and the wave structures. The results showed that the probability of a fast denotation re-initiation in the chamber increases as the distance between the OD occurring location and the pre-detonator’s outlet decreases. Based on the results, this work suggests a critical condition for the fast detonation re-initiation, which is expected to provide significant guidance to the design of the denotation engines.
UR - http://www.scopus.com/inward/record.url?scp=85051736188&partnerID=8YFLogxK
U2 - 10.2514/6.2018-3948
DO - 10.2514/6.2018-3948
M3 - 会议稿件
AN - SCOPUS:85051736188
SN - 9781624105616
T3 - 2018 Aerodynamic Measurement Technology and Ground Testing Conference
BT - 2018 Aerodynamic Measurement Technology and Ground Testing Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 34th AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2018
Y2 - 25 June 2018 through 29 June 2018
ER -