摘要
磁流体发电是一种高效、低污染的发电技术。相对于其他发电方式,磁流体发电具有输出功率大、结构紧凑的优点,在高功率电源应用领域有不可替代的性能优势。文中提出采用非平衡等离子体射流的方式产生等离子体,进行磁流体发电的设想。通过数值模拟研究了等离子体射流在横向磁场作用下的特性,并通过试验对模型计算结果进行了验证。模拟研究说明横向磁场对等离子体射流有阻滞作用,在没有外电流回路的情况下,射流气体的动能转化为热,随外加磁场强度的增加,阻滞作用越强,速度减慢越明显;等离子体射流在磁场作用下电流密度主要集中在射流出口附近,并随着外加磁场强度增大而增大。
Magneto-hydrodynamic （MHD） power generation is a kind of technology with high efficiency and low pollution. Authors present that the non-equilibrium gas discharge technology can be used to produce low-temperature plasma which can be applied in MHD power generation. The characteristics of corona jet across transverse magnetic field have been studied by numerical simulation, and the results were validated by experiments. The when corona jet passes through present research indicates that the transverse magnetic field, it would be resisted as a result of the electromagnetic induction phenomenon; when there is no external circuit, the kinetic energy of the corona jet converts into Joule thermal energy; with the increment of the magnetic flux density, the corona jet is resisted and its velocity slower intensively; the current density produced by the corona jet across the transverse magnetic field mostly concentrates around the spout, and which increases with the increment of magnetic flux density.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2008年第5期108-112,共5页
Proceedings of the CSEE
关键词
等离子体射流
磁流体:能量转换
数值模拟
corona jet
magneto-hydrodynamic
energy conversion
numerical simulation
