Modeling of the Plasma-Propellant Interaction

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

doi:10.1109/tmag.2006.887674

Cited by 31 publications

(39 citation statements)

References 11 publications

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“…It was found for the surface temperature range predicted by the PPI model (300 K ≤ T s ≤ 1200 K) and for the conditions of the experiment used to fix the total ablated mass [6], [13], that carbon ablation is negligible. This is due to carbon's low vapor pressure in the temperature range.…”

Section: Surface Chemistrymentioning

confidence: 98%

“…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%

“…To model a propellant we require the vapor pressure, enthalpy of sublimation (∆H), specific heat at constant pressure (C p ), the thermal conductivity (λ) and diffusivity (α). Simulations [6] were run comparing two propellants under consideration for ETC application. JA2 is a doublebase propellant, which is optically semi-transparent, allowing radiation to penetrate in-depth.…”

Section: Plasma-propellant Interaction Modelmentioning

confidence: 99%

“…Typically, the amount of material deposited back onto the ablating surface is calculated using a fitting parameter [4]. The ability to use a fitting parameter does not present itself [6], [15]. Note that the carbon vapor pressure is negligible when compared to that of the propellant.…”

Section: Surface Chemistrymentioning

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: Surface Chemistrymentioning

confidence: 98%

Section: Inventions (Dd882)mentioning

confidence: 99%

Section: Plasma-propellant Interaction Modelmentioning

confidence: 99%

Section: Surface Chemistrymentioning

confidence: 99%

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Modeling of Plasma-Induced Ignition and Combustion

Boyd¹,

Keidar²

2008

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“…Meanwhile, SCB plasma emission is thought to be involved in the process of ignition, but has not been evaluated in any detail [8]. In other cases of plasma ignition, heat is also considered to be the primary cause of ignition, based on experimental data [10] and numerical simulations [11]. However, the influence of plasma radiation [12], plasma pressure [13] and plasma flow-field distribution [14] are addressed in other systems.…”

Section: Introductionmentioning

confidence: 99%

Light Effect in Semiconductor Bridge Plasma Ignition

Zhang¹,

Li²,

Wan³

et al. 2017

Cent. Eur. J. Energ. Mater.

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Abstract:Heat is considered to play an important role in Semiconductor Bridge (SCB) plasma ignition. Nevertheless, in this paper a non-heat effect is reported for SCB ignition of primary explosives. An initial comparison showed that there is no reasonable correlation between the ease of plasma ignition and the 5-s explosion temperature. Meanwhile the addition of Pb3O4 was found to make lead styphnate (LS) more active to SCB plasma ignition whereas the heat decomposition of this mixture was not accelerated. In terms of the phenomena mentioned above and the response of primary explosives to SCB plasma, we propose an effect of light in SCB plasma ignition. The free radical concentration change indicates that light enhances the activity of primary explosives in SCB plasma ignition. Regarding the mixture of LS and Pb3O4, the additive itself does not make LS sensitive to the SCB plasma. However, the supplement makes LS active under light exposure. As a result, the effect of light on SCB plasma ignition was confirmed by the experiments conducted in this study. This paper provides a new understanding of SCB plasma ignition from the viewpoint of explosives, which is of importance for the design of SCBs.

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

Porwitzky

Keidar

Boyd

2007

Propellants Explo Pyrotec

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A coupled plasma sheath/ablation model is developed for electrothermal chemical gun applications. By combining a commonly employed collisional sheath model with a previous ablation model, the convective heat flux as a function of time to the propellant bed is determined for two potential electrothermal chemical gun propellants, XM39 and JA2. It is found that the convective heat flux varies smoothly from a nearly collisionless to a fully collisional regime over the short duration of the plasma pulse. The possibility of determining an accurate estimate of the amount of heat flux to the propellant bed due to radiation from the bulk plasma presents itself.

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Modeling of the Plasma-Propellant Interaction

Cited by 31 publications

References 11 publications

Modeling of Plasma-Induced Ignition and Combustion

Modeling of Plasma-Induced Ignition and Combustion

Light Effect in Semiconductor Bridge Plasma Ignition

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

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