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Structural Engineering and Mechanics Volume 62, Number 2, April25 2017 , pages 163-170 DOI: https://doi.org/10.12989/sem.2017.62.2.163 |
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Motion behavior research of liquid micro-particles filtration at various locations in a rotational flow field |
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Yan Yan, Yuanzai Lin, Jie Cheng and Zhonghua Ni
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| Abstract | ||
| This study presents a particle-wall filtration model for predicting the particle motion behavior in a typical rotational flow field-filtration in blower system of cooker hood. Based on computational fluid dynamics model, air flow and particles has been simulated by Lagrangian-particle/ Eulerian-gas approaches and get verified by experiment data from a manufacturer. Airflow volume, particle diameter and local structure, which are related to the particle filtration has been studied. Results indicates that: (1) there exists an optimal airflow volume of 1243 m3/h related to the most appropriate filtration rate; (2) Diameter of particle is the significant property related to the filtration rate. Big size particles can represent the filtration performance of blower; (3) More than 86% grease particles are caught by impeller blades firstly, and then splashed onto the corresponding location of worm box internal wall. These results would help to study the micro-particle motion behavior and evaluate the filtration rate and structure design of blower. | ||
| Key Words | ||
| Computational Fluid Dynamics (CFD); two-phase model; particle-wall filtration model; blower | ||
| Address | ||
| Yan Yan, Yuanzai Lin, Jie Cheng and Zhonghua Ni: Department of Mechanical and Engineering, Southeast University, 79 Su Yuan Avenue, Nan Jing, 211189, China | ||