AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Performance Study of Miniature Cyclones with Multiple Inlets
DI LIU, Zhenzhong Zhang, Ta-Chih Tsiao, Da-Ren Chen, Virginia Commonwealth University
Abstract Number: 104 Working Group: Instrumentation and Methods
Abstract Epidemiological studies showed the adverse heath effect of ultrafine particles, leading to the development of portable and cost-effective particle sizers for spatial measurements of ultrafine particles. The devices based on DMA/EAA or OPC techniques have been proposed to measure size distribution of particles in ultrafine size range. However, the performance of these devices affects by the presence of large particles in the sampled stream. Miniature cyclones have been proposed as the size-selective inlet to remove large particles. In addition, single-inlet cyclones may encounter the issue of directional sampling when used as the size-selective inlet. Miniature cyclones with multiple inlets are thus proposed in this study to minimize the above issues.
A group of miniature cyclones with different numbers of inlets (i.e., single-, dual- and quarto-inlets) were designed and made in this study. The pressure drop and particle cut-off curves of miniature cyclones were characterized at various operational flow rates. With the pressure drop data collected, a semi-empirical model stemmed from the Chen-Shi’s model was developed. A CFD modeling was also applied to calculate the flow field and the pressure drop across these cyclones. More, a new relationship between the pressure drop and cutoff size of these multi-inlet cyclones was observed in this study. The detail of this study will be presented in this talk.