THE HYDRODYNAMIC ANALYSIS FOR CUTTING PRINCIPLE OF THE NEGRETTI SAMPLE HEAD
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Graphical Abstract
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Abstract
According to two-phase hydrodynamic theories, the motionof the aerosol particles in a Negretti sample head is analyzed in this paper.The motion trajectory of the aerosol particles during the sampling ofPM_10 and PM_2.5 is computed.The influence of various factors such as airflow flux, diameter of aerosolparticles on the movement trajectory is discussed. The results show thatthe two-phase hydrodynamics is effective in simulating the motionof aerosol particles within an impactor. It can offer a powerfulhelp for the design and manufacture of impactor.
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