Three-dimensional structures of MHD flow in a disk generator
Three-dimensional structures of MHD flow in a disk generator
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盘式发电机中磁流体流动的三维结构
DOI：
10.1109/27.736055
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发表时间：
1998
影响因子：
1.5
通讯作者：
S. Kabashima
中科院分区：
文献类型：
--
作者：
Hiromichi Kobayashi;Y. Okuno;S. Kabashima
对MHD作用下的三维非均匀等离子体和边界层进行了数值研究。由于种子材料的弱电离，非均匀的“流光”等离子体在r-/Splθ/平面上具有螺旋结构，等离子体在r-z平面内的壁间变得几乎均匀。这种结构与我们在以前的论文(1997)中的结构几乎相同，其中气体(重粒子)的性质被假定为不变和稳定的。除了流光外，还发现了由于惰性气体的弱电离而产生的“磁区”不均匀等离子体。磁区具有垂直于流光的结构。在强MHD相互作用的情况下，产生通道上游区域的静压显著增加，并在产生器中出现伪激波，但等离子体沿/SPLθ/方向几乎是均匀的。在强MHD相互作用中，边界层相当厚，在靠近壁面的宽阔区域，霍尔电流反向流动。在弱MHD相互作用情况下，等离子体沿/SPLθ/方向形成非均匀结构，并且由于方位向电场不为零，即使在绝缘子壁上，霍尔电流也不总是反向流动。
Three-dimensional nonuniform plasmas and boundary layers have been studied numerically under an MHD interaction. The nonuniform plasma of "streamer" owing to weak ionization of seed material has a spiral structure in the r-/spl theta/ plane, and the plasma becomes almost uniform between the walls in the r-z plane. This structure is almost the same as that in our previous paper (1997), where the gas (heavy particle) properties are assumed to be invariant and steady. In addition to the streamer, the nonuniform plasma of "domain" owing to weak ionization of noble gas is revealed. The domain has the structure perpendicular to the streamer. In a strong MHD interaction case, the static pressure considerably increases in the upstream region of a generation channel, and the pseudo-shock waves appear in the generator, but the plasma is almost uniform along the /spl theta/ direction. The boundary layer in the strong MHD interaction is considerably thick, and in the broad region near the wall the Hall current flows reversely. In the weak MHD interaction case, the plasma forms a nonuniform structure along the /spl theta/ direction, and the Hall current does not always flow in the opposite direction even on the insulator wall since the azimuthal electric field is not zero.
DOI：
10.1137/0913035
发表时间：
1992-03-01
期刊：
SIAM JOURNAL ON SCIENTIFIC AND STATISTICAL COMPUTING
影响因子：
--
作者：
VANDERVORST, HA
通讯作者：
VANDERVORST, HA