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根据太阳风的起源,对太阳风的等离子体动力学理论进行研究。对磁流体力学(MHD)做了详细概述,在此基础上讨论稳定态下的震波结构,并进行详细的公式推导,特别是对它的不连续结构与旋转不连续的性质进行说明。通过对卫星观测结果的分析,得到两种磁场方向不连续面:切向不连续(TD)和旋转不连续(RD)。研究表明,TD的特性为垂直不连续面的磁场分量为零,电离子不通过该面;RD两侧的磁场方向不同但是大小相同,且有电离子通过该不连续面。太阳风中旋转不连续面主要与高速太阳风有关。通过分析6种不连续结构得到:在通过界面的磁通量保持不变的情况下,切向磁场会任意改变方向,出现旋转不连续现象,且此现象能够通过一维空间结构图方法加以验证。通过对比推导结果与数据验证图,发现数据图的分析支持公式的推导,证实太阳风起源区等离子存在旋转不连续机制。
According to the origin of the solar wind, the solar wind plasma dynamics theory is studied. A detailed overview of MHD is given. Based on this, the structure of the shock wave in steady state is discussed and a detailed formula deduction is made, especially its discontinuous structure and discontinuous rotation. By analyzing the satellite observations, two discontinuities in the magnetic field are obtained: tangential discontinuity (TD) and rotational discontinuity (RD). The results show that the characteristic of TD is that the magnetic field component of vertical discontinuities is zero and the ions do not pass through the surface. The magnetic fields on both sides of RD have different directions but the same size and have ions passing through the discontinuous surface. Solar wind spin discontinuities mainly associated with high-speed solar wind. By analyzing six kinds of discontinuous structures, the tangential magnetic field can change direction arbitrarily and the discontinuity of rotation appears when the magnetic flux passing through the interface remains the same, and the phenomenon can be verified by one-dimensional spatial structure diagram method. By comparing the results of the derivation with the data validation maps, it is found that the analysis of the data plots supports the derivation of the formulas and confirms the existence of a rotational discontinuity in the plasma in the solar wind origin region.