Numerical simulation of radiated noise during combustion of energetic materials in a closed bomb

Xiong, Shihui; Tuo, Yang; Wu, Yu-jun; Wang, Jingcheng; Li, Yuan; Wen, Yuanqiao

doi:10.1016/j.dt.2021.05.013

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…However, since the pyrotechnic separation device mainly uses the high-temperature and high-pressure gas generated by gunpowder combustion to unlock and separate, there is a minimum reliable starting pressure, so the effect of reducing the actuating noise of the pyrotechnic separation device by adjusting the energetic charge and gas pressure is limited. 17…”

Section: Study On Combustion Noise Suppression Methods Of Pyrotechnic...mentioning

confidence: 99%

Design and research of a low-noise pyrotechnic separation device

Xiong

Wang

et al. 2021

Journal of Low Frequency Noise, Vibration and Active Control

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To solve the problem of large operating noise of existing pyrotechnic separation devices, a new low-noise pyrotechnic separation device is designed by changing the utilisation mode of pyrotechnic separation, using micro gas pyrotechnic as heat sources, and shape memory alloy material to convert heat energy into mechanical energy. The results showed that the separation time was 1.526 s when the preload was 20 kN, and the maximum shock response was 319 G (2268 Hz) for 100 Hz–100 kHz. When used underwater, the maximum sound pressure level is 106.9 dB at 12,698 Hz and 98.5 dB from 10 Hz–5 kHz. Compared with a conventional separation nut, the frequency band sound pressure level can be reduced by more than 70 dB, realising underwater low-noise separation.

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Section: Study On Combustion Noise Suppression Methods Of Pyrotechnic...mentioning

confidence: 99%

Design and research of a low-noise pyrotechnic separation device

Xiong

Wang

et al. 2021

Journal of Low Frequency Noise, Vibration and Active Control

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“…The results show that Mr and Er increase with the peak pressure and decrease with the time of peak pressure. The relationship between Mr and Er and the peak pressure and the time of peak pressure follows an exponential relationship, as follows: The results of the literature [6] show that reducing the burn rate coefficient ω can reduce the peak pressure and extend the time of peak pressure. In summary, those results suggest that adjusting the burn rate of the main charges can prolong the pressure rise time and reduce peak pressure, which in turn reduces the output shock of the igniter.…”

Section: Effect Of Combustion Characteristics Of Main Charges On Outp...mentioning

confidence: 99%

“…They suggest that the different pressure characteristics occur due to the combustion wave movements generated by the rapid ZPP combustion. Xiong et al [6] used ANSYS Fluent to develop a single-phase combustion model for APP and predicted the pressure distribution in the closed bomb under different loading doses of main charges. Zhao et al [7] used the deflagration equation of state built into MSC.DYTRAN to simulate the pressure-time profiles of two pyrotechnic charges (APP and CPN) in the closed bomb.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the effect of combustion characteristics of main charges on the output shock of a typical igniter

Wang

Ren

et al. 2023

J. Phys.: Conf. Ser.

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Numerical simulations for the output pressure and the shock response were performed using the hydrocode MSC.DYTRAN to analyze the effect of the combustion characteristics of main charges on the output shock of a typical igniter. The results are in good agreement with the experimental results. Numerical simulations were performed by changing the type of main charges. The results show that the differences in the gas production capacity of main charges have a greater effect on the output shock of the igniter than the reaction rate.

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“…Regarding the study of dynamic separation in spinning projectiles with trajectory-end detection, literature [5] states that the combustion process of propellant in the chamber of a gun is essentially the same as that in a closed bomb before the projectile's motion. Literature [6] uses a closed bomb to investigate the combustion and gas formation of propellant under constant volume conditions and combines it with computational fluid dynamics (CFD) for modeling and simulation. The effectiveness of the model was verified through experiments.…”

Section: Introductionmentioning

confidence: 99%

Dynamics Analysis of Separation Mechanism for Rotating Projectiles at the End of Trajectory

Zhao,

Yue,

et al. 2024

Mathematical Problems in Engineering

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Spin separation technology is a key technology for realizing the detection function at the end of the rotational trajectory. It is also a necessary condition for the fuse control system to adjust its control strategy according to actual combat needs. To explore a new type of proximity fuse detection method, this article first designs a detection separation mechanism for the end of the trajectory. An interior ballistic model of the separation mechanism was then established through closed bomb tests and equivalent interior ballistic equations, and the aerodynamic parameters of the front-stage separation body at the moment of separation were obtained based on computational fluid dynamics numerical simulation. Finally, a separation dynamics model of the separation mechanism was established to analyze the motion state after the separation action of the front-stage separation body. The results demonstrate the feasibility of the proposed separation mechanism. The discrepancy between the simulation and experiment of the velocity increment for the front-stage separation body is about 1.07%. The attack angle for the front-stage separation body is below 2°, and the period with a displacement between two stage bodies greater than 3 m is around 0.365 s. This research can provide new ideas and theoretical references for the design of a similar fuse detection separation mechanism.

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Numerical simulation of radiated noise during combustion of energetic materials in a closed bomb

Cited by 7 publications

References 21 publications

Design and research of a low-noise pyrotechnic separation device

Design and research of a low-noise pyrotechnic separation device

Numerical simulation of the effect of combustion characteristics of main charges on the output shock of a typical igniter

Dynamics Analysis of Separation Mechanism for Rotating Projectiles at the End of Trajectory

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