Equation of State of Detonation Products Based on Chemical Equilibrium

Zhao, Yan; Liu, Haifeng; Pang, Wei Wei

doi:10.4028/www.scientific.net/amr.790.61

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The detonation products of TNT were described using the JWL equation of state, and the material parameters were obtained from the literature. 30 Figure 9 shows a comparison of the pressure profiles obtained from the simulations and tests. In the tests, the pressure increased rapidly after ignition at t 1 (0.45 ms).…”

Section: Numerical Simulation Resultsmentioning

confidence: 99%

Numerical simulation of actuation processes and decoupling pyroshock of a pressure cartridge-type pin puller

Wang

Xiong

Wen

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

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In this study, a finite element model of a pressure cartridge-type pin puller is used to simulate the actuation process and predict the actuation shock using the deflagration equation of state and the fluid-structure coupling algorithm of the MSC/Dytran. The established model is validated by comparing the simulation results with the experimental results for pressure and actuation shocks. Based on the established finite element model, the contribution of the four shock sources to the actuation shock is quantitatively decoupled by changing the state of the pin puller. The results demonstrate that the maximum shock caused by the piston impact was 7454.33 G in the analysis frequency range of 500 Hz–10 kHz. The piston impact was the primary contributor to the actuation shock, accounting for approximately 80.80%. The contribution of the shock caused by payload release was approximately 18.56%. However, the total contributions of the shock generated by the pyrotechnic charge combustion and piston cutting off the shear pin were less than 1%. The conclusions of this study can provide a reference for the structural and shock-reduction design of pressure cartridge-type pyrotechnic separation devices.

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Section: Numerical Simulation Resultsmentioning

confidence: 99%

Numerical simulation of actuation processes and decoupling pyroshock of a pressure cartridge-type pin puller

Wang

Xiong

Wen

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

View full text Add to dashboard Cite

show abstract

“…Its built-in Euler with 2D multi-material algorithm can simulate the shock wave generated by explosions accurately. The shock wave pressure generated by TNT with the same energy of plasma is described by the JWL state equation [26], and its specific form is…”

Section: Explosion Shock Wave Model Of Plasmamentioning

confidence: 99%

Numerical Simulation of Acoustic Wave Generated by DC Corona Discharge Based on the Shock Wave Theory

Yang

et al. 2023

Applied Sciences

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The audible noise generated by corona discharge has the N-type characteristic at the initial generation stage, and it is a typical shock wave. This shock wave usually only exists around the corona source with a tiny range, making it difficult to obtain its characteristics through experimental measurements. An electrosound-combined simulation of the corona discharge based on the shock wave theory was conducted, and the development process involving the corona discharge, shock wave, and sound wave was simulated. First, the corona was numerically simulated based on the 2D pin–plate axisymmetric hydrodynamic model. It was found that the plasma was mainly distributed near the axis of the corona field where the electric field changed violently, and the maximum value of the electric field appeared at the head of the discharge channel. Then, the plasma energy was equivalent to the explosive energy, and a plasma explosion shock model was established. It was found that the shock wave pressure had obvious positive and negative pressure zones, and the propagation velocity decays to the sound velocity gradually. Finally, the shock wave pressure derived by the explosion model was used as the acoustic source, and the acoustic wave propagation process was simulated. The simulated sound pressure waveform had the same characteristics as the relevant experimental measurement results, proving that the developed method possessed strong applicability and gave rise to a new angle for the simulation of corona-generated audible noise.

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Equation of State of Detonation Products Based on Chemical Equilibrium

Cited by 2 publications

References 9 publications

Numerical simulation of actuation processes and decoupling pyroshock of a pressure cartridge-type pin puller

Numerical simulation of actuation processes and decoupling pyroshock of a pressure cartridge-type pin puller

Numerical Simulation of Acoustic Wave Generated by DC Corona Discharge Based on the Shock Wave Theory

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