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浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
Mechanical Engineering and Energy Engineering     
Acoustic agglomeration experiments of monodispersed aerosol
ZHOU Dong, LUO Zhong yang, LU Meng shi, HE Ming chun, CHEN Hao, FANG Meng xiang
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
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Abstract  
Taking monodispersed aerosols as particle sources, the influence of that with different particle sizes on optimal acoustic agglomeration parameters was investigated to figure out the relationship between optimal sound parameters and particle size distributions of different aerosols in acoustic agglomeration. Monodispersed DEHs (diethylhexylsebacate) aerosol was used as the particle source. The effect of particle size and sound frequency on the number concentration of monodispersed aerosol under different sound conditions was analyzed. A higher decrement rate of particle number concentration means a better effect of sound wave. It is found that when the sound frequency ranges from 1 000 to 2 200 Hz, the acoustic agglomeration of 2 μm particle is more effective than that of 0.2 μm and 0.5 μm. The optimum frequency for 2 μm particle is a bit lower.

Published: 06 March 2017
CLC:  X 51  
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ZHOU Dong, LUO Zhong yang, LU Meng shi, HE Ming chun, CHEN Hao, FANG Meng xiang. Acoustic agglomeration experiments of monodispersed aerosol. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(2): 358-362.


单分散气溶胶的声波团聚实验

针对在声波团聚研究中最佳声波参数与气溶胶粒径分布情况之间的关系尚不明确的问题,提出采用单分散气溶胶作为颗粒源,研究不同粒径的单分散气溶胶对最佳声波团聚参数影响的方法.采用单分散癸二酸二异辛酯（DEHs）气溶胶作为颗粒源,研究在不同声场作用下,不同粒径、不同频率对单分散气溶胶数目浓度的影响.颗粒物数目浓度减少率越大,声波团聚的效果越好.结果表明,在选取的1 000～2 200 Hz频率段,大粒径的2 μm颗粒物声波团聚效果好于小粒径的0.2和0.5 μm的情况,而2 μm颗粒物较优的声波团聚频率略低于0.2和0.5 μm的颗粒物.

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