Experimental study on jet initiation for detonation driver

LU Xingyu; LI Jinping; CHEN Hong; YU Hongru

doi:10.11883/bzycj-2018-0223

Volume 39 Issue 6

Jun. 2019

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LU Xingyu, LI Jinping, CHEN Hong, YU Hongru. Experimental study on jet initiation for detonation driver[J]. Explosion And Shock Waves, 2019, 39(6): 062102. doi: 10.11883/bzycj-2018-0223

Citation:

LU Xingyu, LI Jinping, CHEN Hong, YU Hongru. Experimental study on jet initiation for detonation driver[J]. Explosion And Shock Waves, 2019, 39(6): 062102. doi: 10.11883/bzycj-2018-0223

LU Xingyu, LI Jinping, CHEN Hong, YU Hongru. Experimental study on jet initiation for detonation driver[J]. Explosion And Shock Waves, 2019, 39(6): 062102. doi: 10.11883/bzycj-2018-0223

Citation:

LU Xingyu, LI Jinping, CHEN Hong, YU Hongru. Experimental study on jet initiation for detonation driver[J]. Explosion And Shock Waves, 2019, 39(6): 062102. doi: 10.11883/bzycj-2018-0223

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Experimental study on jet initiation for detonation driver

doi: 10.11883/bzycj-2018-0223

LU Xingyu^{1, 2
,},
LI Jinping^{2
,
,},
CHEN Hong^{1, 2},
YU Hongru²

1.
School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
2.
State Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China

Received Date: 2018-06-20
Rev Recd Date: 2018-07-26

Available Online: 2019-05-25

Publish Date: 2019-06-01

Abstract

Abstract

The free-flow simulation range of the detonation driven shock tunnel is closely related to the detonation limit of the driving gas. The wider the detonation limit, the larger the simulation range. The driving gas is generally detonated through the igniter (ignition tube). Increasing the detonation capability of the ignition tube can broaden the detonation limit. In order to improve the ignition capacity of the igniter, the effects of three factors, the diameter of the ignition tube, the detonation sensitivity of the ignition gas, and the single/double igniter tube, were investigated experimentally. The velocity of the driven segment was measured under different initial conditions in the igniters. The conclusions are as follows. Firstly, improving the caliber of the ignition tube can significantly enhance the ability to initiate. Secondly, the ignition gas detonation sensitivity has an impact on the detonation capability: when the igniter is a reduced-diameter internal profile, the low-sensitivity gas has a stronger detonation capability; when the igniter pipe is of the same diameter internal profile, the result is reversed. Finally, if the synchronization of the jets can be ensured, the double igniters can improve the detonation ability. In order to ensure the synchronization, it is necessary to use a sensitive ignition gas like hydrogen oxygen mixtures of equivalent ratio.
- detonation,
- turbulent jet,
- detonation initiation,
- shock tunnel,
- detonation driver

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References(27)

References

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