The UK electric gun programme in 1998

Haugh, D.; Firth, M.

doi:10.1109/20.738368

Cited by 12 publications

(1 citation statement)

References 1 publication

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“…Capillary discharge plasma is widely used in many technical applications, such as waveguides [1,2], electrothermal chemical guns [3][4][5][6][7], pre-inject plasma armatures into rail guns [8], and simulating conditions of hard disruption in tokamak fusion reactors [9][10][11][12][13]. These works mainly focus on the ablation of capillary materials, capillary discharge models, and capillary discharge experiments.…”

Section: Introductionmentioning

confidence: 99%

Investigation into geometric effect in capillary discharge plasma generator using an improved ablation model

Zhang¹,

Li²,

Chen³

et al. 2020

J. Phys. D: Appl. Phys.

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The wall material and the electrode material together determine the composition of the capillary discharge plasma. In this paper, an improved ablation model considering polyethylene (PE) and copper ablation and deposition was developed. Generators with different geometric sizes were calculated and tested. The results show that the concentration distributions of copper and PE in the generator were the pair-wise opposite, and the aspect ratio (AR) had a threshold (AR = 8.67). The copper mass density distribution varied from uniform to inhomogeneous with the increase in AR, which was similar to that of its concentration distribution. The maximum copper mass density increased with the increase in AR, and the AR threshold was also 8.67. The relationship between the copper or PE ablated mass and capillary length or diameter approximately followed a power law, and the relationship between the copper or PE ablated mass and AR approximately followed a proportional law. The PE mass density distribution was not similar to that of its concentration for AR ≥ 8.67. The PE ablated mass increased with the increase in AR, and its variation was similar to that of the maximum PE mass density. When the AR(AR > 5.2) was large enough, the PE mass density distribution determined the total mass density distribution. Otherwise, the total mass density distribution was determined by the mass density distribution of PE and copper. Overall, the simulation results were in good agreement with the experiments. These can be used to select the size and material of the capillary in simulating high heat flux plasma or electrothermal chemical gun ignition.

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Section: Introductionmentioning

confidence: 99%

Investigation into geometric effect in capillary discharge plasma generator using an improved ablation model

Zhang¹,

Li²,

Chen³

et al. 2020

J. Phys. D: Appl. Phys.

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Theoretical Analysis of Plasma Enhancement of Propellant Burning Rate

Alimi¹,

Berdichevsky²

2007

Propellants Explo Pyrotec

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A theoretical model of the combustion of a nitramine solid propellant in the presence of a plasma jet is proposed. Unlike standard double‐base compositions, nitramine propellants exhibit experimental evidence that plasma induces a burning rate enhancement. The model is based on heat transfer considerations and proposes a closed‐form solution of the enhancement of the propellant burning rate as a function of the thermophysical parameters of the system. The model provides a good qualitative agreement with experimental results.

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Mechanism of Solid Propellant Combustion Submitted to a High Plasma Flux

Alimi¹,

Berdichevsky²

2008

Propellants Explo Pyrotec

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A simplified mechanism of the plasma effect on the combustion on different types of propellants is presented. The model provides a semi‐quantitative prediction of the burning rate enhancement that should be expected for a given propellant composition and structure. Depending on the propellant structure and composition, one expects a burning rate enhancement either to disappear or to survive a certain time after the plasma injection has been turned off. In order to estimate the internal front propagation rate, we have built a simplified model of the RDX ignition inside the matrix. A cubic lattice topology has been assumed and the ignition front extends from one layer to its nearest neighbor. The propagation rate was found to be dependent on the lattice constant, the particle size, the thermo‐chemical properties of the RDX particles and the matrix background.

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The UK electric gun programme in 1998

Cited by 12 publications

References 1 publication

Investigation into geometric effect in capillary discharge plasma generator using an improved ablation model

Investigation into geometric effect in capillary discharge plasma generator using an improved ablation model

Theoretical Analysis of Plasma Enhancement of Propellant Burning Rate

Mechanism of Solid Propellant Combustion Submitted to a High Plasma Flux

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