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为了研究爆炸冲击波前气流的扬尘特征及其关键影响因素,基于欧拉-欧拉方法,对不同冲击波前流速、沉积粉尘密度和粉尘粒径对扬尘效果的影响进行了模拟研究.结果表明:沉积粉尘在较低的冲击波前流速(100～300m/s)条件下,具有较理想的扬尘效果;粉尘密度在1 000～3 000kg/m3范围内,沉积粉尘的密度对其扬起特征影响较小;粉尘粒径对冲击波的扬尘特征影响明显,在粉尘颗粒较大时(大于0.1mm),由于颗粒受重力作用明显,扬尘效果不佳;在粒径较小时,粉尘可以在巷道空间内得到较好的分散,形成的粉尘团簇的各粉尘层分布均匀.
In order to study the dust characteristics and the key influencing factors of the blast shock wave front airflow, the Euclid-Euler method was used to simulate the effects of different velocity front wave, deposition dust density and dust particle size on the dusting effect. The results show that: Dust has the best dusting effect at low pre-shock wave velocity (100-300m / s). Dust density is in the range of 1000-3000kg / m3. The density of deposited dust has little effect on its rising characteristics ; The dust particle size has a significant impact on the dust characteristics of the shock wave. When the dust particles are larger (greater than 0.1 mm), the dust effect is not good due to the obvious gravitation effect of the particles; when the particle size is small, dust can be obtained in the tunnel space Good dispersion, the formation of dust clusters of dust evenly distributed.