Chemically Reacting Plasma Jet Expansion Simulation for Application to Electrothermal Chemical Guns

Porwitzky, Andrew; Scalabrin, Leonardo; Keidar, Michael; Boyd, Iain D.

doi:10.2514/6.2007-4600

Cited by 12 publications

(15 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PLASMA-AIR CHEMISTRY During the capillary discharge, the generated plasma exits the capillary nozzle and either comes into immediate contact with the propellant, or expands in an open air filled chamber before encountering the propellant bed, depending on the propellant packing option being used [2], [10]. Our simulations indicate that, for typical ETC conditions, if the plasma jet is allowed to expand into air, plasma-air chemistry will occur if the capillarypropellant distance is less than approximately 10 mm [5]. For geometries with plasma-air interaction regions on this scale, plasma-air chemistry should be taken into account.…”

Section: Capillary Modelmentioning

confidence: 88%

“…Experimental attempts to measure the composition of the plasma jet have yielded few promising results [5]. The results of the simulations clearly indicate that small capillary-propellant distances allow us to entirely neglect plasma-air chemistry, which yields insight when choosing propellant packing options for practical ETC application.…”

Section: Capillary Modelmentioning

confidence: 95%

“…To date, models have been developed that address the capillary plasma source [3], [4], the plasma-air chemistry of the expanding capillary plasma jet into the combustion chamber [5], the plasmapropellant interaction via a coupled ablation and thermal model [6], and the convective heat flux to the propellant bed by means of a collisional plasma sheath model [7]. This effort represents the first attempt to create a model of the ETC phenomena, from the initial capillary firing through the plasma-propellant interaction leading up to propellant ignition.…”

Section: Inventions (Dd882)mentioning

confidence: 99%

“…A plasma-air chemistry model based on previous experimental and theoretical work was developed that includes 20 species and 41 chemical reactions [5]. This model was used in a chemically reacting CFD code developed at the University of Michigan, known as LeMANS.…”

Section: Capillary Modelmentioning

confidence: 99%

See 3 more Smart Citations

Modeling of Plasma-Induced Ignition and Combustion

Boyd¹,

Keidar²

2008

Self Cite

View full text Add to dashboard Cite

The 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 of information.Send comments regarding this burden estimate or any other aspect of this collection of information, including suggesstions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 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 oenalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. a. REPORT Modeling of Plasma Induced Ignition and Combustion ABSTRACT SECURITY CLASSIFICATION OF:Much progress has been made in the work performed in this grant toward the development of an end-to-end computer model of an electrothermal chemical gun. Phenomena that must be considered in an electrothermal chemical gun model include the initial capillary plasma properties, the plasma-air interaction, plasma sheath effects, and the plasma-propellant interaction itself. This report presents an overview of our progress made modeling these various phenomena. Also discussed are methods under consideration to incorporate surface chemistry effects into the plasma-propellant interaction model. Modeling of Plasma Induced Ignition and Combustion Report Title ABSTRACTMuch progress has been made in the work performed in this grant toward the development of an end-to-end computer model of an electrothermal chemical gun. Phenomena that must be considered in an electrothermal chemical gun model include the initial capillary plasma properties, the plasma-air interaction, plasma sheath effects, and the plasma-propellant interaction itself. This report presents an overview of our progress made modeling these various phenomena. Also discussed are methods under consideration to incorporate surface chemistry effects into the plasma-propellant interaction model. (c) Presentations 0.00 Number of Presentations:1.00 Non Peer-Reviewed Conference Proceeding publications (other than abstracts):Number of Non Peer-Reviewed Conference Proceeding publications (other than abstracts): 0 Peer-Reviewed Conference Proceeding publications (other than abstracts): (d) ManuscriptsNumber of Peer-Reviewed Conference Proceeding publications (other than abstracts): 0 Names of Under Graduate students supported PERCENT_SUPPORTED NAME FTE Equivalent:Total Number:The number of undergraduates funded by this agreement who graduated during this period with a degree in science, mathematics, engineering, or technology fields:The number of undergraduates funded by your agreement who graduated during this period and will continue to pursue a graduate or Ph.D. degree in science, mathematics, engineerin...

show abstract

Section: Capillary Modelmentioning

confidence: 88%

Section: Capillary Modelmentioning

confidence: 95%

Section: Inventions (Dd882)mentioning

confidence: 99%

Section: Capillary Modelmentioning

confidence: 99%

See 2 more Smart Citations

Modeling of Plasma-Induced Ignition and Combustion

Boyd¹,

Keidar²

2008

Self Cite

View full text Add to dashboard Cite

show abstract

“…To date, models have been developed that address the capillary plasma source [3], [4], the plasma-air chemistry of the expanding capillary plasma jet into the combustion chamber [5], the plasma-propellant interaction via a coupled ablation and thermal model [6], and the convective heat flux to the propellant bed by means of a collisional plasma sheath model [7]. This effort represents the first attempt to create a model of the ETC phenomena, from the initial capillary firing through the plasma-propellant interaction leading up to propellant ignition.…”

Section: Introductionmentioning

confidence: 99%

Progress Towards an End-to-End Model of an Electrothermal Chemical Gun

Porwitzky¹,

Keidar²,

Boyd³

2008

2008 14th Symposium on Electromagnetic Launch Technology

Self Cite

View full text Add to dashboard Cite

Much progress has been made in the last few years toward the development of an end-to-end computer model of an electrothermal chemical gun. Phenomena that must be considered in an electrothermal chemical gun model include the initial capillary plasma properties, the plasma-air interaction, plasma sheath effects, and the plasma-propellant interaction itself. This paper presents an overview of recent progress made modeling these various phenomena. Also discussed are methods under consideration to incorporate surface chemistry effects into the plasma-propellant interaction model.

show abstract

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

Chemically Reacting Plasma Jet Expansion Simulation for Application to Electrothermal Chemical Guns

Cited by 12 publications

References 16 publications

Modeling of Plasma-Induced Ignition and Combustion

Modeling of Plasma-Induced Ignition and Combustion

Progress Towards an End-to-End Model of an Electrothermal Chemical Gun

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

Contact Info

Product

Resources

About