Transmission and reflection characteristics of gaseous detonation waves impacting on gas-solid interface

LYU Haicheng; HUANG Xiaolong; LI Ning; WENG Chunsheng

doi:10.11883/bzycj-2021-0523

Volume 42 Issue 11

Nov. 2022

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LYU Haicheng, HUANG Xiaolong, LI Ning, WENG Chunsheng. Transmission and reflection characteristics of gaseous detonation waves impacting on gas-solid interface[J]. Explosion And Shock Waves, 2022, 42(11): 112101. doi: 10.11883/bzycj-2021-0523

Citation:

LYU Haicheng, HUANG Xiaolong, LI Ning, WENG Chunsheng. Transmission and reflection characteristics of gaseous detonation waves impacting on gas-solid interface[J]. Explosion And Shock Waves, 2022, 42(11): 112101. doi: 10.11883/bzycj-2021-0523

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Transmission and reflection characteristics of gaseous detonation waves impacting on gas-solid interface

doi: 10.11883/bzycj-2021-0523

National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

Received Date: 2021-12-20
Rev Recd Date: 2022-06-05

Available Online: 2022-05-12

Publish Date: 2022-11-18

Abstract

Abstract

The correlation characteristics of transmitted and reflected waves in the process of impact of the gas-solid interface by the gaseous detonation wave are of great engineering significance. A one-dimensional theoretical model was established to analyze the process of the detonation wave impacting the gas-solid interface. The changes in the pressure and interface velocity on both sides of the interface with different initial pressures after the detonation wave reaching the gas-solid interface were analyzed. The process of the gas-solid interface impacted by the gas-phase detonation wave was numerically simulated. The space-time conservation element and solution element (CE/SE) method and the elementary reaction mechanism were used to simulate the gaseous detonation, and the immersed boundary method (IBM) was used to simulate the fluid-structure interaction. The pressure distribution, rules of velocity change of partial reflection wave of gas, and the waveform and velocity characteristics of stress wave transmitted into solid were analyzed. An experimental device of the impact of the piston by gaseous detonation was built and used for further verification. The results show that after the gaseous detonation wave reaches the gas-solid interface, the elastic wave in the exponential form is transmitted in the solid, and a shock wave is reflected in the gas zone at the interface. The rarefaction wave after the detonation wave intersects with the reflected shock wave, which weakens the reflected shock wave. In this process, the pressure after the reflected shock wave decreases, and the wave velocity becomes faster. The pressure in the intersection area of the original and reflected rarefaction waves remains uniform. Finally, the reflected shock wave becomes stable, and the gas-solid interface forms a constant state. Under different initial pressures of the same mixture, the ratio of maximum pressure to detonation pressure in the process of the impact of the detonation wave remains stable. The theoretical model is consistent with the calculated values and experimental data of related physical quantities at the feature points.
- detonation wave,
- gas-solid interface,
- reflected shock wave,
- stress wave

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References(25)

References

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