Transient Phenomena in a Nonequilibrium Subsonic Disk MHD Generator at Load Changes
Transient Phenomena in a Nonequilibrium Subsonic Disk MHD Generator at Load Changes
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负载变化时非平衡亚音速盘磁流体发生器的瞬态现象
DOI：
10.1541/ieejpes1990.121.1_123
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发表时间：
2001
影响因子：
--
通讯作者：
H. Yamasaki
中科院分区：
文献类型：
--
作者：
H. Takana;Y. Nabara;Y. Okuno;H. Yamasaki
采用准一维时间相关数值模拟方法研究了非平衡圆盘亚音速磁流体发电机在负载变化时的瞬态现象。当负载电阻突然改变时，在阳极和阴极附近引起流体动力学扰动。当稳定放电持续时，扰动在发生器通道中传播并在边界反射后逐渐消失。因此，它被证实，发电机工作稳定，在负载变化，虽然在霍尔电位过冲是暂时诱导。如果负载电阻随着不稳定等离子体的出现而变低，则由其引起的扰动仍保留在发生器中。
The transient phenomena in a nonequilibrium disk subsonic MHD generator at load changes were exam ined with time dependent quasi-one-dimensional numerical simulations. When load resistance is suddenly changed, fluid-dynamical disturbances are caused near the anode and cathode. When the steady discharge is sustained, the disturbances gradually disappear in the generator channel after propagating and being re flected at the boundaries. Thus, it is confirmed that the generator works stably at load changes, although the over-shooting in Hall potential is induced transiently. If the load resistance is changed as lower as the unsteady plasma appears, the disturbances attributed to it remain in the generator.