WAVES IN A MOVING MEDIUM WITH FINITE CONDUCTIVITY

被引:3
作者
DUNN, DA
WALLACE, RW
CHOI, SD
机构
[1] Institute for Plasma Research Stanford University, Stanford
关键词
D O I
10.1109/PROC.1969.6868
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Solutions for the steady-state behavior of TEM. ‘FE and TM waves in an infinite conducting medium moving at a uniform velocity are presented, along with relations between the time average power trananitted through the medium, power dissipated in the medium, ami power delivered to an external mechanical load that maintains the medium at a constant ve-locity. Exact solutions valid at any velocity are obtained using the Lorentz transformation. It is shown that the TEM and TE modes describe relativistic linear induction motors or ac MHD generators in which the usual J × B force is the dominant force mechanism. The TM mode describes a class of electroconvection devices in which the electric field acting on the induced surface charge on the interface between the medium and the air gap is the dominant force mechanism. Both the TE and the TM modes are shown to have efficiencies and force generation capabilities which are independent of the absolute value of velocity. Copyright © 1969 by The Institute of Electrical and Electronics Engineers, Inc.
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页码:45 / &
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