单磁岛对热输运影响的数值计算

摘要

通过求解二维热输运方程,数值分析了横越单磁岛的热输运现象.仅有背景加热时,当磁岛宽度小于临界磁岛宽度时,磁岛对能量约束影响不明显；当磁岛宽度大于临界磁岛宽度时,磁岛降低的能量损失随着磁岛宽度呈线性增大,有效径向热导系数在磁岛区域呈高斯分布且最大值在有理面处.当等离子体背景加热与ECRH共同加热时,ECRH对磁岛区域的温度分布及能量约束均有别于背景热源,这为进一步研究ECRH抑制撕裂模的问题提供了基础.%The heat transport across single magnetic island is analyzed numerically by solving two-dimensional energy transport equation. For the background heating, when the magnetic island width is less than the critical magnetic island width, magnetic islands impact on the energy confinement is not obvious, when the magnetic island width is greater than the critical magnetic island width, the energy loss increases linearly with the magnetic island width, and the effective radial thermal conductivity coefficient is in a Gaussian distribution and the maximum value is at the rational surface. For both the background heating and the ECRH heating, temperature distribution and heat energy confinement are different from that of background heating, it provide a basis for further study of the ECRH stabilizing tearing mode.