固态颗粒空间环境下升华过程数值分析

在轨液体的排放将产生毫米级固态颗粒空间碎片，由于其升华耗散过程具有不确定性，若长期留轨将产生危害。文章以水为例，通过数值模拟对冰粒在轨升华过程进行分析。结果表明，冰粒的太阳吸收比是影响其升华的重要因素，采取措施提高颗粒的太阳吸收比和减少单个颗粒的平均质量都可有效加快颗粒的升华耗散。

Numerical analysis of particle sublimation process in solid state under space environment

The discharge of the liquid on the orbit will produce more and more millimeter space debris as accompanied with the frequent space activities.Due to the heat dissipation uncertainty during the sublimating process,their long-term presence on the orbit will endanger the space environment.Taking water as an example,the paper analyzes numerically the sublimating process of the liquid particle in the solid state on the orbit.The results show that the solar absorptivity of particles plays most important roles in the sublimation.Furthermore,the increase of the solar absorptivity and the decrease of the single particle’s average mass will improve the heat transfer during the sublimating process.