On the Mechanism of Energy Transfer in the Plasma‐Propellant Interaction

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

doi:10.1002/prep.200700042

Cited by 26 publications

(19 citation statements)

References 14 publications

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“…As in the PPI model, the bulk plasma density, n o , is treated as a parameter as it is not known at this time. We find that, depending on the value of the bulk plasma density, convective heat flux can represent a significant portion of the total heat flux to the propellant bed [7]. Fig.…”

Section: Collisional Plasma Sheath Modelmentioning

confidence: 76%

“…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%

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Modeling of Plasma-Induced Ignition and Combustion

Boyd¹,

Keidar²

2008

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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...

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Section: Collisional Plasma Sheath Modelmentioning

confidence: 76%

Section: Inventions (Dd882)mentioning

confidence: 99%

Modeling of Plasma-Induced Ignition and Combustion

Boyd¹,

Keidar²

2008

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“…where n o is the bulk plasma number density, and η w is the non-dimensional floating potential, calculated via an analytical expression [7]. The only unknown in (4) is u iw , the nondimensional ion-wall impact velocity, which we obtain from the sheath solution.…”

Section: Collisional Plasma Sheath Modelmentioning

confidence: 99%

“…In order to determine what phenomena contribute to the total heat flux, a collisional plasma sheath model was developed to find the convective heat flux to the propellant bed [7].…”

Section: Collisional Plasma Sheath Modelmentioning

confidence: 99%

“…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%

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

Porwitzky¹,

Keidar²,

Boyd³

2008

2008 14th Symposium on Electromagnetic Launch Technology

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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.

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Response of TEGDN Propellants to Plasma Ignition with the Same Magnitude of Ignition Energy as Conventional Igniters in an Interrupted Burning Simulator

Xiao

Ying

2015

Propellants Explo Pyrotec

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[a] 1Introduction Plasma-propellant interaction had been widely studied to understand the plasma ignition mechanismo fp ropellants [1][2][3][4][5][6][7],a ugmentation burning rate phenomena [8],a nd physical processes [ 9],a nd to benefit the design of the plasma generator to ignite the charge system during the gun or combustion simulator [10].A lso, there are many demonstration tests [11,12] in the electrothermalc hemical gun (ETC) and achieved valuable results to proof the advantage of plasma ignition, such as shorter and reproducible ignitiond elay time, reducedt emperature sensitivity of the propellant, and the possibility of easily adjustingt he electricalp arameters, whichi nfluence the ignition of the combustion process.Althought he plasma ignition systemh as many advantages, it is still encounteredw ith many challenges for its application in the ETC gun. From the viewpoint of propellant charge design, the propellantsa ppropriate to be ignited by plasma playedacriticalr ole in the application of ETC gun systemb asedo nt he intensive academic and practical research and developmento fE TC gun. The matcht est on the plasma ignitionf or new kinds of propellants has to be investigated to boost the development of specific propellants appropriate to be ignited by plasma, which were difficult to be ignited by convention ignition methods.In gun propellant chemistry,nitrocellulose (NC) and nitroglycerine (NG) basedg un propellants are highly prone to accidental initiationa sar esult of externals timulus (fire, shock wave, and impact). In ordert or educe the risks, high energy insensitive propellants are an attractive alternative for conventional NC/NG based propellants. The plasticizer triethyleneglycol dinitrate (TEGDN) is added to the system to partially replace nitroglycerine (NG) to increase the force of double-basep ropellants and reduce the sensitivity to the external stimulus. This kind of propellant is denoted as TEGDN propellant in the context. Meanwhile, the use of energetic polymer binderi .e. energetic thermoplastic elastomers (ETPE)i ni ts formulation is regardeda sapractical method to formulate high energy insensitive propellants [13,14].Significant progress on the small-scale test grid related with combustion and energy release was madei nt he development of high energy and insensitive propellants including energetic thermoplastic elastomers (ETPE) [15].Previousw ork [10] focused on the match tests to validate the electrothermal chemical (ETC) gun applicationf or the emergingi nsensitive high energy propellants with high loading density in small-scale demonstration test. The match test on propellant loading parametersa nd plasma Abstract:I no rder to consider the potential influenceo fignition energy factors on the responseo fd ouble basep ropellants plasticized with triethyleneglycol dinitrate (TEGDN propellants), the influence of different ignition methods at the same magnitude of ignition energy level on the response of TEGDN propellants was investigated in an interrupted burning simulator.C om...

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On the Mechanism of Energy Transfer in the Plasma‐Propellant Interaction

Cited by 26 publications

References 14 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

Response of TEGDN Propellants to Plasma Ignition with the Same Magnitude of Ignition Energy as Conventional Igniters in an Interrupted Burning Simulator

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