Design and characterization of adaptive separation of radioactive aerosol
This paper studies the separation and monitoring of artificial radioactive aerosol radon under different particle density environment and proposes an environmental adaptive separation technology based on virtual shock principle.Based on the principle of virtual impact,a two-dimensional model of submicron virtual impactor is built.Then,combined with fluid dynamics,the separation efficiency and wall loss of the virtual impactor under different particle density,structure and flow are numerically calculated to clarify the multi-factor influence rule on the separation efficiency.The adaptive separation rule of radon aerosol is revealed by the submicron virtual impactor under different particle density.Our results show the submicron virtual impactor exhibits good separation curve steepness for radon aerosol,good separation performance and low wall loss.The effect of particle density and flow on separation efficiency is greater than that of structure.The adaptive flow regulation of the submicron virtual impactor realizes efficient separation of radon aerosol under different particle densities.At a particle density of 2200 kg/m3,the separation efficiency of the submicron virtual impactor is 18.35％ higher than that before the adaptive one,and the wall loss is lower.
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