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NUMERICAL CALCULATION OF INERTIAL ASPIRATION EFFICIENCY OF AEROSOLS INTO THIN-WALLED SAMPLING INLETS
Citation:
Boyle, K., T. Kim, M. Flynn, AND R. Wiener. NUMERICAL CALCULATION OF INERTIAL ASPIRATION EFFICIENCY OF AEROSOLS INTO THIN-WALLED SAMPLING INLETS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-94/101 (NTIS PB94146453), 1993.
Description:
Unbiased sampling of airborne particulate from a flowing stream requires that the size distribution and concentration of aerosol collected be identical to that of the aerosol in the free stream. ampling errors occur during aspiration of the aerosol from the free stream to he face of the inlet and during transmission of the aerosol along the sampling tube. dditional losses or gains may occur due to particle bounce from the front edge of the sampler. n this paper, a numerical model for determining the aspiration component of overall sampling efficiency for any arbitrarily shaped thin-walled inlet is presented. umerical simulations presented here are limited to examining the effect of pitch angle and velocity ratio on the aspiration efficiency. oth two and three dimensional models are presented, and the limitations of the approach are discussed.
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NUMERICAL CALCULATION OF INERTIAL ASPIRATION EFFICIENCY OF AEROSOLS INTO THIN-WALLED SAMPLING INLETS