著者

榎原 研正 プライナー ネルソン P. マルホランド ジョージ W.

出版者

公益社団法人精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.60, no.12, pp.1726-1730, 1994-12-05

被引用文献数

1

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The use of the electric-mobility-classification method for sizing 0.1 μm mono-disperse particles was examined experimentally. It was suggested in a recent study that, in contradiction to the well-established theory of the electric mobility classification, the experimentally observed particle size depended slightly on the sample aerosol flow rate. In order to investigate this phenomenon, a statistically designed experiment was conducted in which precise setting of the air flow rates was made possible through a newly devised air flow configuration. It was confirmed that the measured particle size did decrease as the sample aerosol flow rate increased. The observed variation in the apparent size was about 0.7%, when the aerosol flow rate was varied from 0.3 L/min to 2 L/min.

著者

江竜 和信 瀬戸 章文 水上 陽介 名倉 瑞紀 古内 正美 田島 奈穂子 加藤 孝晴 榎原 研正 大谷 吉生

出版者

日本エアロゾル学会

雑誌

エアロゾル研究 (ISSN:09122834)

巻号頁・発行日

vol.24, no.1, pp.24-29, 2009-03-20 (Released:2009-03-31)

参考文献数

8

被引用文献数

3

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Inertial filter, which classifies nanoparticles by inertial filtration, has been developed by Otani et al. (Aerosol and Air Quality Research, 7, 343-352 (2007) ) . The present work is aimed at formulating the fundamental design rules for the inertial filters with an appropriate cutoff size at a low pressure drop. We numerically calculated the classification performance for nanoparticles and compared the results with the experimental data obtained with TEM grids which has rigid and uniform structure as a model filter. As a result, thorough the theoretical calculation and experiments, (1) the collection efficiency of inertial filter can be successfully predicted by the conventional filtration theory based on the single fiber collection efficiency. (2) A filter with a finer fiber diameter can achieve smaller cutoff size at a lower pressure drop, however, the theoretical calculation suggested (3) an inertial filter consisting of fibers smaller than 14 μm cannot suppress the diffusional collection of nanoparticles with the diameter of 20 nm even at a filtration velocity of 30 m/s.