DocumentCode :
3259195
Title :
A novel ECT-EST combined method for gas-solids flow pattern and charge distribution visualization
Author :
Zhou, Bin ; Zhang, Jianyong
Author_Institution :
Sch. of Energy & Environ., Southeast Univ., Nanjing, China
fYear :
2012
fDate :
16-17 July 2012
Firstpage :
89
Lastpage :
94
Abstract :
A non-invasive measurement method of visualizing the flow pattern and charge distribution of gas-solid two-phase flow has been applied to flow measurement in a gravity-dropping conveyance system and a pneumatic conveyance system. The permittivity distribution acquired from an ECT (Electrical Capacitance Tomography) can be used to improve the iteration accuracy in establishing charge sensitivity field of an EST (Electrostatic Tomography), hence to reduce the uncertainty of inverse calculation of charge distribution. The experimental results show that, for the gravity-dropping system, charge density increases with particle concentration, whilst in the pneumatic conveyance system, charge density decreases in the area where the particle concentration is higher. The total charge intensity decreases with the increase of the concentration of pulverized coal in the pipe.
Keywords :
capacitive sensors; electrostatic devices; flow visualisation; pattern formation; pipe flow; two-phase flow; ECT-EST combined method; Electrical Capacitance Tomography; Electrostatic Tomography; charge distribution visualization; charge sensitivity field; flow measurement; gas-solid flow pattern; gas-solid two-phase flow; gravity-dropping conveyance system; iteration accuracy; noninvasive measurement method; particle concentration; permittivity distribution; pipe; pneumatic conveyance system; pulverized coal concentration; total charge intensity; Charge measurement; Coal; Electrodes; Electrostatics; Permittivity; Sensitivity; Sensors; charge distribution; flow pattern; gas-solid two-phase flow;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Imaging Systems and Techniques (IST), 2012 IEEE International Conference on
Conference_Location :
Manchester
Print_ISBN :
978-1-4577-1776-5
Type :
conf
DOI :
10.1109/IST.2012.6295556
Filename :
6295556
Link To Document :
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