一、引言 工程实践中的许多问题都与气固两相流动现象有关。如大气粉尘污染问题、固体物料的气力输送及煤粉燃烧问题等等。在这些情况中,两相流动的规律都比较复杂,而且各具特殊性。例如煤粉燃烧问题,空气-煤粉中颗粒的大小、形状变化很大,流动情况很复杂(如湍流、不稳定)。对于这些气固两相流动问题,目前通常是采用实验方法来研究。然 I. INTRODUCTION Many problems in engineering practice are related to the phenomenon of gas-solid two-phase flow. Such as atmospheric dust pollution problems, the pneumatic conveying of solid materials and pulverized coal combustion problems and so on. In these cases, the law of the two-phase flow is rather complicated and each has its own particularity. For example, the problem of pulverized coal combustion, air - pulverized coal particle size, shape changes, the flow is very complicated (such as turbulence, instability). For these gas-solid two-phase flow problems, the current method is usually used to study. Of course