Abstract
A cone was placed just upstream of the second stage of a Two-Stage Circumferential Slot Virtual Impactor in an attempt to uniformly distribute 10 μm aerodynamic diameter (AD) aerosol particles so a circumferential inlet of the second stage, which was located below the cone, could uniformly aspirate aerosol. Large losses were observed near the apex of the cone; however, the losses can be significantly reduced by injecting a small counter-flow jet of sheath flow through the apex of the cone. The jet displaces the stagnation point of the main flow and thereby alters the particle trajectories. Computational Fluid Dynamics (CFD) was the primarily tool used to investigate the concept through simulating the effects of different operational conditions such as the ratio of counterflow jet velocity to main flow velocity and the Stokes number. The velocity of the counterflow jet should be approximately 1–2 times the main airflow velocity to achieve low particle losses. The jet becomes asymmetric when the ratio of it...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
