不同粒径分布条件下烟雾遮蔽能力的研究

为了研究烟雾遮蔽能力的消光机理,进而为电子干扰提供理论模型和实验平台,以烟雾遮蔽能力检测系统为基础,测试了赤磷、黄磷烟幕成烟后0、10、20、30 min条件下可见光波段的全遮蔽能力,并通过粒度分析仪同步测量了在该系统中磷烟雾随时间的粒径变化.在假设磷烟雾粒子为均一系球形粒子的前提下,基于Mie理论建立了全遮蔽能力的理论计算模型,推导了不同粒度情况下,具有吸收指数的磷烟雾的TOP值,所得到的计算结果与实验结果一致.通过理论与实验分析可以得出,表征磷烟雾的全遮蔽能力的TOP值随粒径改变而改变.

Research on the obscuring power of different sized particle of smog

The total obscuring power(TOP) of red phosphorus and yellow phosphorus smog in the visual band was measured to understand the mechanism causing light elimination in smoke.This provided a theoretical model and an experimental platform for analyzing electronic interference.Using a smog full-screening detection system,variations in smog grain size were also measured at 0,10,20 and 30 min respectively after the smoke was formed using granulometry.Using Mie theory,a theoretical model for calculating TOP was developed with the preconditions that there are single,decentralized spherical particles.Using this model,TOP values for various sizes of phosphorus smog were calculated.These results are in reasonable agreement with those observed in experiments.According to our theoretical analysis and experimental observations,it is shown that TOP values vary with the particle sizes.