NDLI: Calculation and Verification on the Linear Instability of Shaped-Charge Jet Under Axial Pulse Current

Content Provider	IEEE Xplore Digital Library
Author	Wenda Qi Bin Lei Hong-Jun Xiang Xichao Yuan Xue-Ping Meng He Li
Copyright Year	1973
Abstract	To improve the defense capability of passive electromagnetic armor against shaped-charge jet (SCJ), according to the superposition principle and the linear perturbation theory, the SCJ disturbance control equations are constructed and the 3-D equation is reduced to 1-D equation, consequently, the instability growth rates of the pinch and kink of SCJ and the varying law of instability growth rates with time and yield stress are obtained under the axial pulse current, which indicate that the instabilities must occur as long as the perturbations exit. Meanwhile, the SCJ deformation can be calculated through numerical method. The pinching experiments with a 39.2-mm diameter armor-piercing projectile proceeded when the charging voltage is 5370 V and the peak current is 140 kA. The kinking experiments with a 1.75-mm diameter copper wire proceeded when the charging voltage is 5140 V and the peak current is 43 kA. The experimental results demonstrate that axial pulse current can destroy the SCJ because of necking or kinking perturbation and confirm the validity of the theoretical analysis.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	3889
Ending Page	3894
Page Count	6
File Size	1543403
File Format	PDF
ISSN	00933813
Volume Number	43
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mathematical model Electromagnetics Copper Wires Current density Stress Projectiles pulse current. Instability kinking necking passive electromagnetic armor (PEMA) pulse current
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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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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