爆炸对云滴碰并增长的实验研究

在2m3云室中进行了一组研究爆炸对云滴碰并增长影响的试验。用一个模拟爆炸源产生冲击波，通过沉降取样和FSSP观测爆炸前后的滴谱变化。沉降取样结果表明，在爆炸声压级130 dB作用后的2分钟内，滴谱变宽，较大云滴浓度增加。从室内试验看，爆炸冲击波似乎能促进云滴的碰并过程。本文结果为爆炸对暖云影响提供了一种可能的解释。

A Laboratory Study of Explosion Effects on Cloud Droplets Coalescence

A set of experiments is designed and conducted in 2m3 cloud chamber to study the possible effects of explosion on cloud droplets coalescence. A simulating explosion is used to generate shock wave and precipitation method and FSSP probe of PMS are used to monitor the droplet spectra. The data show that the droplet spectra become broader and the larger droplet concentrations increase in 2 minutes after explosive shock wave influence (acoustic pressure is about 130dB). It seems that explosion in cloud could promote the droplet coalescence process and produce some larger droplets which would grow through further coalescence. The result could provide an explanation of explosion effects on warm cloud modification.