About AAQR

Aims and Scope

Articles online
For contributors
Call for Papers
Guideline for the
Special Issue Proposal
Subscription
Information

Advertising

Contact Us
 
Search for  in   Search  Advanced search  

 

Volume 16, No. 12, December 2016, Pages 3037-3054 PDF(952 KB)  
doi: 10.4209/aaqr.2016.07.0319   

Developments in Unipolar Charging of Airborne Particles: Theories, Simulations and Measurements

Chenghang Zheng, Qianyun Chang, Quanyang Lu, Zhengda Yang, Xiang Gao, Kefa Cen

State Key Laboratory of Clean Energy Utilization, State Environmental Protection Center for Coal-Fired Air Pollution Control, Zhejiang University, Hangzhou, China

 

Highlights
  • A summary of unipolar particle charging models in all regimes has been presented.
  • Numerical techniques and experimental results on unipolar charging have been summarized.
  • Recent developments in the design of unipolar chargers have been overviewed.

Abstract

 

Charging of airborne particle is an important process in both scientific studies and industrial applications, of which the unipolar charging takes up the major part due to higher charging efficiency. In order to understand the charging mechanism of airborne particles, accordingly to predict the efficiency of unipolar chargers, different theoretical models have been proposed and investigated in all regimes. Numerical techniques have been also adopted by researchers to analyze the charging process of airborne particles and thus to model the unipolar chargers. On the other hand, with the advent and application of various measuring techniques, the electric charges measurement of airborne particles was made possible for researchers. In this work, we mainly present a summary of these models, numerical techniques and experimental results on unipolar charging in all regimes, as well as the recent developments in the design of unipolar chargers, trying to briefly overview the development in this research field.

 

 

Keywords: Airborne particle; Unipolar charging; Theoretical models; Numerical simulations; Charger design.

 

 

Copyright © 2009-2014 AAQR All right reserved.