Structural Engineering and Mechanics

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Motion behavior research of liquid micro-particles filtration at various locations in a rotational flow field

  • Yan, Yan (Department of Mechanical and Engineering, Southeast University) ;
  • Lin, Yuanzai (Department of Mechanical and Engineering, Southeast University) ;
  • Cheng, Jie (Department of Mechanical and Engineering, Southeast University) ;
  • Ni, Zhonghua (Department of Mechanical and Engineering, Southeast University)
  • Received : 2016.09.16
  • Accepted : 2016.12.28
  • Published : 2017.04.25
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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 $1243m^3/h$ 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.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Central Universities

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