类ITER偏滤器瓦片表面热流沉积的粒子模拟

Particle simulation of heat deposition on the ITER-like divertor tile surface

使用热侵蚀沉积粒子程序(HEDPIC)模拟了由小块沿环向表面倾斜的瓦片组成类ITER偏滤器的极向缝隙附近瓦片表面的热流密度分布,研究了不同倾斜高度对热流密度分布的影响。研究结果表明,当瓦片设置成合适的倾斜角度时,瓦片上表面靠近缝隙附近的电子热通量为零;离子热流密度小于上表面远离缝隙的热流密度,棱边处热流密度过高的问题得到解决。

Heat flux distribution near the poloidal gap of ITER-like divertor plate castellated with small monoblock tiles inclined to the surface along the toroidal direction is simulated with a particle simulation code,HEDPIC.The effect of beveling height on the heat flux distribution is investigated.The results show that when the tile is set at an appropriate tilt angle,the electron heat flux density on the upper surface near the gap is zero,and the ion heat flux is less than that of the upper surface away from the gap.Therefore,the high heat flux problem of tile edge is solved.