AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Performance of Inertial Impactor with Varying Geometries
HUAN LI, William Faulkner, John Haglund, Texas A&M University
Abstract Number: 74 Working Group: Instrumentation and Methods
Abstract Inertial impactors are extensively used in air quality monitoring. Nozzles for inertial impactors can be challenging to machine. Those that require the simplest tooling often converge quickly near the nozzle exit, which may affect impactor performance. In present study, the nozzles with two kinds of profiles and two standoff distances were placed into an impactor, and the performance of inertial impactors was tested in a wind tunnel using solid ammonium fluorescein particles with Stoke's numbers from 0.09 to 0.59. The effectiveness of impactor for each particle size was obtained by fluorometric analysis. The rate of nozzle convergence significantly impacted the slope of the impactor effectiveness profile. Effects of standoff distance are being evaluated.