中文摘要：

本文实验研究了在外界辐射下沙床中的乙醇燃料的燃烧特性，考察了不同辐射量以及沙床粒径的影响。结果表明外界热辐射加速了沙床内乙醇燃料的蒸发，燃烧的强度增强，蒸汽区宽度增加，燃料消耗速率和总燃料消耗量增大。同时燃烧过程中随着沙床粒径的增大，气液共存区宽度变小，燃烧持续时间及总燃料消耗量增大。这些燃烧特性为清除污染以及灭火提供了科学依据。

英文摘要：

Experimental studies were conducted to investigate burning characteristics of sand soaked with ethanol under external radiation. The results show that, external radiation accelerated the ethanol evaporation and enhanced the combustion, width of the vapor region becomes decreased, the fuel consumption rate and the final fuel consumption increased. Moreover, with increasing of the sand diameter, width of the liquid/vapor coexisting zone decreased, burning duration time and the final fuel consumption increased. These combustion characteristics are of significance for cleaning soil polluted by oils and fire safety.