Numerical Study on High Frequency Radio Wave Heating Ionosphere F Layer Based on One-dimensional Model
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摘要: 基于电离层一维仿真加热模型，详细介绍了模型中电子的动量方程、连续性方程、能量方程和各类参量表达式，利用对角矩阵追赶法数值求解电离层F层加热过程，分析了不同时次电子数密度和电子温度的变化，讨论了不同频率和不同功率电波加热的情形.结果表明：当高频电波加热高电离层时，电子温度迅速增加，并很快趋近于饱和状态；电子密度的变化较为迟缓，但在加热过程中其变化幅度却越来越大；电子密度变化量在沿磁场方向上形成空洞和上下稠团两峰一谷构型；频率越大、功率越高的电波加热时，电子密度的变化也越大，但存在一适值频率的电波对电子温度的影响最小.Abstract: Based on ionosphere one-dimensional heating model, the momentum equation, continuity equation and energy equation of electrons, and various parameter expressions are introduced. The heating process of ionosphere F layer is numerically solved by using the diagonal matrix pursuit method. During heating, the changes of electron density and temperature at different times are analyzed, the cases of heating ionosphere by radio wave with different frequency and power are also discussed. The results show that, when the ionosphere is heated by high frequency radio wave, the electron temperature increases rapidly, and soon approaches saturation. While the change of electron density is always slow, but the change range is more and more large during heating process. Under the influence of the geomagnetic field, the change of the electron density presents the hollow structure with the upper and lower dense structure, which is two peaks and one valley configuration. When radio wave heating ionosphere, the higher the frequency or the power is, the greater the change of electron density is. There is a suitable frequency which has the least influence on electron temperature.
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