以烟雾遮蔽能力检测系统为平台,测试了常规烟幕黄磷在0.38～0.76 μm可见光波段的全遮蔽能力(TOP),并通过粒度分析仪测量了黄磷烟雾随时间变化的粒度改变。在假设磷烟雾粒子为单分散系球形粒子的前提下,基于激光透射模型建立了全遮蔽能力的理论计算模型,并进一步推导了不同粒度情况下具有吸收指数的黄磷烟雾的TOP值,所得到的计算结果与实验值相近。结果表明,中等湿度、室温条件下,黄磷成烟后10～30 s内,粒径分布在0.5～3 μm范围,并且随时间增加而减小,TOP值随粒径变小有下降趋势。

Based on the smog full-screening detection system, the total obscure power of normal yellow phosphorus smog in 0.38～0.76 μm visual band was measured, and the variation of the smog grain size with time was also measured with granulometry. According to laser transmission model, a total obscure power (TOP) theoretical calculation mode was established under the condition of single-decentralization spherical particle. With the mode, the TOP values of various grain size yellow phosphorus smog with absorption index were deduced, and the theoretical calculation results were agreement with the experimental results. According to the experimental results, under a middle humidity and room temperature, the particle diameters were about 0.5～3 μm and gradually decreased after forming the smoke for 10～30 s, and the TOP values reduced with the diameter decrement.