NDLI: Study of Different Models of the Wall Ablation Process in Capillary Discharge

Content Provider	IEEE Xplore Digital Library
Author	Rui Li Xingwen Li Shenli Jia Murphy, A.B. Zongqian Shi
Copyright Year	1973
Abstract	Wall ablation is a critical physical process in the capillary plasma generator for electrothermal-chemical (ETC) guns, and its characteristics directly determine the generator's performance. In this paper, three different ablation models for the capillary discharge are studied. First, based on a recently developed two-layer kinetic model that takes into account the structure of the sheath in the plasma-wall transition region, ablation characteristics of two typical materials used in the ETC gun plasma generator, polytetrafluoroethylene and polyethylene, are calculated. These data are required for magnetohydrodynamic (MHD) plasma modeling, and for analysis of the characteristics of different materials from the viewpoint of capillary material selection. Then, using discharge parameters of a typical ETC plasma generator working cycle, three widely used ablation models are compared and analyzed. These models are the two-layer kinetic model (model-K), a model based on the Langmuir law (model-L) and a simplified arc-wall interaction model (model-E). The time dependence of the ablation rate and total ablated mass are calculated with each method, and then the features of the different ablation models are discussed. It demonstrates that the model-K is the most reliable model in terms of predictions accuracy, while its computational efficiency is poorer when applied in MHD simulations compared with the model-E.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	1033
Ending Page	1041
Page Count	9
File Size	1376025
File Format	PDF
ISSN	00933813
Volume Number	38
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasma properties Magnetic materials Plasma sheaths Plasma materials processing Predictive models Character generation Magnetohydrodynamic power generation Kinetic theory Magnetic analysis Electrothermal launching plasma Ablation capillary electrothermal-chemical (ETC) guns magnetohydrodynamic (MHD) model
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Ablation Study in a Capillary Sustained Discharge

Numerical Parametric Study of the Capillary Plasma Source for Electrothermal–Chemical Guns

Consideration of pressure gradients in electrothermal-chemical (ETC) guns

Spatial effects of an electrically generated plasma on the interior ballistics of electrothermal-chemical (ETC) guns

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Influence of high loading density charge configurations on performance of electrothermal-chemical (ETC) guns

Discharge of the plasma generator in electrothermal-chemical launchers

Measurement of the properties of plasma from ETC capillary plasma generators

Mixing processes of plasmas in electrothermal-chemical guns

Study of Different Models of the Wall Ablation Process in Capillary Discharge

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