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Theoretical and Numerical Analysis of Discharge Characteristics in Pulsed Electromagnetic Accelerators

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Abstract:

Discharge is critical physical process in pulsed electromagnetic accelerators for arc plasma jet device, and its characteristics directly determines the accelerator performance. The mechanisms of discharge plasma and flow in the accelerator are analyzed by magnetohydrodynamics (MHD). The model is coupled with electric circuit model based on weakly nonideal plasma conductivity and ablation model. Calculation results show that there is some nonideal plasma region which has important effects on electrical conductivity; most ablated gases are ionized at the half cycle of the discharge time and are accelerated by Lorentz force to high exhaust velocity; electrical conductivity, plasma temperature and density are increasing with discharge energy unleashed, and gradually reduce in the post-discharge.

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Periodical:

Advanced Materials Research (Volumes 765-767)

Pages:

805-808

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.765-767.805

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Online since:

September 2013

Authors:

Lei Yang, Xiang Yang Liu, Si Yu Wang, Ning Fei Wang

Keywords:

Discharge Characteristics, Magnetohydrodynamics (MHD), Numerical Analysis, Pulsed Electromagnetic Accelerators

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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