Computational and experimental investigations of open-air plasma discharges

Nusca, Michael J.; White, Kevin J.; Williams, Anthony W.; Landsberg, Alexandra; Young, T. R.; Lind, Charles A.

doi:10.2514/6.1999-865

Cited by 10 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in experimental work by Kohel et al [2], the expanding plasma jet from the capillary plasma device into the open-air exhibits the strongly underexpanded jet, which implies that the bore exit should be sonic or supersonic. At the same time, according to theoretical analysis of Ashkenazy [14], it is concluded that the flow along the capillary is subsonic and can be reached sonic only at the bore exit for the constant cross-sectional capillary.…”

Section: Numerical Solution Proceduresmentioning

confidence: 94%

“…The Army Research Laboratory (ARL) has an Manuscript extensive program to investigate this technology with a goal to improve the ignition of solid propellant. White et al [1] and Nusca et al [2] conducted experiments for the open-air plasma discharge which showed the typical formation of an underexpanded jet. The experimental program had been carried out for years at The University of Texas at Austin [3], [4].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Time-dependent one-dimensional modeling of pulsed plasma discharge in a capillary plasma device

Kim¹

2003

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

The capillary plasma device is a relatively new technology for producing plasma vapor after ablating the capillary bore wall using high-magnitude pulsed electric power. Time-dependent behavior of the plasma flow in the capillary plasma device is investigated numerically by solving the radially averaged one-dimensional inviscid conservative equations of gas dynamics using LCPFCT gas dynamics code, which utilizes flux corrected transport (FCT) in solving generalized continuity equations. Joule heating and the mass ablation from the bore wall are incorporated in the numerical modeling. The thermodynamic and transport properties of the plasma are evaluated based on the assumption of local thermodynamic equilibrium and weakly nonideal plasma. At the bore exit, the sonic boundary condition is applied due to the thermally choked flow. The computational results yield the details of the plasma discharge behavior in the capillary bore including high-pressure and high-temperature plasma conditions at the bore exit. The plasma composition at the bore exit shows the significant ionization of the polycarbonate atomic species to the first ionization level, but the second ionization is found to be negligible. Computed mass ablation from the bore wall agrees well with the experimentally determined mass loss, but the assumption of blackbody radiation from the bulk plasma yields the overprediction in mass ablation.

show abstract

Section: Numerical Solution Proceduresmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Time-dependent one-dimensional modeling of pulsed plasma discharge in a capillary plasma device

Kim¹

2003

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

show abstract

“…Nusca et al [14][15][16] and Sharikov and Surzhikov [17] studied the evolution of the structure of a pulsed plasma jet issuing from a capillary discharge channel into air by combining experiment and calculation. The temperature, pressure and velocity of the plasma jet fluctuate, and the latter peak is smaller than the former one in the axial speed curve [18,19].…”

Section: Introductionmentioning

confidence: 99%

Study of the expansion characteristics of a pulsed plasma jet in air

Zhao

Mang

2017

Plasma Sci. Technol.

View full text Add to dashboard Cite

In the background of electrothermal-chemical (ETC) emission, an investigation has been conducted on the characteristics of a freely expanding pulsed plasma jet in air. The evolutionary process of the plasma jet is experimentally investigated using a piezoelectric pressure sensor and a digital high-speed video system. The variation relation in the extended volume, axial displacement and radial displacement of the pulsed plasma jet in atmosphere with time under different discharge voltages and jet breaking pressures is obtained. Based on experiments, a two-dimensional axisymmetric unsteady model is established to analyze the characteristics of the two-phase interface and the variation of flow-field parameters resulting from a pulsed plasma jet into air at a pressure of 1.5-3.5 MPa under three nozzle diameters (3 mm, 4 mm and 5 mm, respectively). The images of the plasma jet reveal a changing shape process, from a quasiellipsoid to a conical head and an elongated cylindrical tail. The axial displacement of the jet is always larger than that along the radial direction. The extended volume reveals a single peak distribution with time. Compared to the experiment, the numerical simulation agrees well with the experimental data. The parameters of the jet field mutate at the nozzle exit with a decrease in the parameter pulse near the nozzle, and become more and more gradual and close to environmental parameters. Increasing the injection pressure and nozzle diameter can increase the parameters of the flow field such as the expansion volume of the pulsed plasma jet, the size of the Mach disk and the pressure. In addition, the turbulent mixing in the expansion process is also enhanced.

show abstract

“…ARL, in cooperation with the Naval Research Laboratory (NRL), had conducted a computational study of open-air plasma discharges from 1997 to 1998 (14)(15)(16). This computational study was based on the NRL CFD code FAST3D (17) and sponsored by the Department of Defense Common High-Performance Computing Software Support Initiative program.…”

Section: Previous Modeling Effortsmentioning

confidence: 99%

Multispecies Reacting Flow Model for the Plasma Efflux of an ETC Igniter - Application to an Open-Air Plasma Jet Impinging on an Instrumented Probe

Nusca¹,

Anderson²,

McQuaid³

2004

View full text Add to dashboard Cite

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

show abstract

Computational and experimental investigations of open-air plasma discharges

Cited by 10 publications

References 2 publications

Time-dependent one-dimensional modeling of pulsed plasma discharge in a capillary plasma device

Time-dependent one-dimensional modeling of pulsed plasma discharge in a capillary plasma device

Study of the expansion characteristics of a pulsed plasma jet in air

Multispecies Reacting Flow Model for the Plasma Efflux of an ETC Igniter - Application to an Open-Air Plasma Jet Impinging on an Instrumented Probe

Contact Info

Product

Resources

About