Impacts of Venturi Turbulent Mixing on the Size Distribution of Sodium Chloride and Dioctyl-Phthalate Aerosols

Cheng, M.-D. ; Wainman, T. ; Storey, J.

Oak Ridge National Laboratory

关键词: Particulates;    Aerosols;    Particle Size Classifiers;    Nozzles;    33 Advanced Propulsion Systems;   

DOI  :  10.2172/763226
RP-ID  :  ORNL/TM-2000/181
RP-ID  :  AC05-00OR22725
RP-ID  :  763226

美国|英语

来源: UNT Digital Library

【 摘 要 】

Internal combustion engines are a major source of airborne particulate matter (PM). The size of the engine PM is in the sub-micrometer range. The number of engine particles per unit volume is high, normally in the range of 10{sup 12} to 10{sup 14}. To measure the size distribution of the engine particles dilution of an aerosol sample is required. A diluter utilizing a venturi ejector mixing technique is commercially available and tested. The purpose of this investigation was to determine if turbulence created by the ejector in the mini-dilutor changes the size of particles passing through it.