Dynamic stabilization of the electrothermal instability
Dynamic stabilization of the electrothermal instability
复制标题
电热不稳定性的动态稳定
DOI：
10.1088/0032-1028/12/12/002
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发表时间：
1970
期刊：
影响因子：
--
通讯作者：
A. Nelson
中科院分区：
文献类型：
--
作者：
R. Uncles;A. Nelson
研究了通过对磁流体发电机中的稳态电流施加振荡来稳定电热不稳定性的可能性。线性平面波分析表明，如果振荡的频率足够高，那么临界霍尔参数总是随着振荡的增加而增加。然而，如果振荡频率远小于在没有动态稳定的情况下计算的增长率，那么在一段时间内，扰动的幅度将移动到线性范围之外。因此，该理论不能预测在低振荡频率下的线性稳定。
The possibility of stabilizing the electrothermal instability by applying an oscillation to the steady current in an MHD generator is examined. A linear, plane wave analysis shows that if the frequency of the oscillation is high enough, then the critical Hall parameter is always increased by the oscillation. However, if the oscillation frequency is much smaller than the growth rate calculated without dynamic stabilization, then the amplitude of a perturbation will move outside the linear range during a period. Therefore, the theory does not predict linear stabilization for low oscillation frequencies.