A qualitative study on the pulsatile flow phenomenon in a dense fly ash pneumatic conveyor

作     者：Wei Chen Kenneth C.Williams Isabel Jabs Mark G.Jones 

作者机构：Centre for Bulk Solids and Particulate TechnologiesNewcastle Institute for Energy and ResourcesThe University of Newcastle Faculty of Mechanical EngineeringLeibniz University of Hanover 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2014年第12卷第6期

页      面：81-91页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

主　　题：Pneumatic conveying Electrical capacitance tomography Fly ash Pulsatile flows Flow pattern analysis 

摘      要：Understanding of the dynamic particulate flow structures within a dense gas-fly ash pneumatic conveyor must be improved in order to better aid its design *** complex pulsatile movement of the gas-fly ash mixture dominates the flow performance within the pipeline,and historically,non-invasive measurement devices such as the electrical capacitance tomography（ECT） were often used to sufficiently capture the flow ***,inadequate studies have been conducted on the pulsatile flow phenomenon,which directly relate to the gas-fly ash two-phase flow *** paper aims to investigate the pulsatile flows using an ECT ***,pulsatile flow patterns under various experimental conditions were obtained through *** within a flow were then characterised into pulse growth and decay segments,which represent the superficial fluidisation and deaeration processes during ***,structural and statistical analyses were performed on the pulse growth and decay *** suggested that the increasing air mass flow rate led to the decrease of the superficial fluidisation/deaeration magnitude,however,the increase of the superficial fluidisation/deaeration ***,the air mass flow rate was indicated as the dominant factor in determining the pulsing statistical *** research provides fundamental insights for further modelling the dense fly ash pneumatic flows.