Search:
Computing and Library Services - delivering an inspiring information environment

Bubble size and bubble rise velocity estimation by means of electrical capacitance tomography within gas-solids fluidized beds

Li, Xiaoxu, Jaworski, Artur and Mao, Xiaoan (2018) Bubble size and bubble rise velocity estimation by means of electrical capacitance tomography within gas-solids fluidized beds. Measurement, 117. pp. 226-240. ISSN 0263-2241

[img] PDF - Accepted Version
Restricted to Repository staff only until 13 December 2019.
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (2MB)

Abstract

Electrical capacitance tomography (ECT) has been developed as a non-invasive and non-intrusive measurement technique to investigate the internal hydrodynamic characteristics of gas-solids systems in fluidized beds. This paper describes an investigation, in which a customized twin-plane ECT sensor was designed and constructed to study the fluid flow processes within a bench-scale gas-solids fluidized bed. A detailed calibration process was conducted using hollow plastic balls of different diameters to derive the reference grey level cut-off values for determining the bubble diameter. In addition, numerical simulations were carried out to investigate the plastic ball wall effect on measured capacitance values. Bubble diameters were estimated by means of the individual reference cut-off values and their linear and second-order fitted curves. Linear back-projection (LBP) and iterative LBP image reconstruction algorithms were compared with respect to estimating the bubble diameter. A number of approaches were investigated to estimate the bubble rise velocity including three methods based on cross-correlation techniques and the detailed signal analysis. Bubble diameters were also obtained using a new approach based on “back-calculation” of the bubble rise velocity through widely accepted empirical correlations from the existing literature.

Item Type: Article
Uncontrolled Keywords: gas-solids fluidized beds, electrical capacitance tomography, bubble diameter, bubble rise velocity, numerical simulation
Subjects: T Technology > TJ Mechanical engineering and machinery
Schools: School of Computing and Engineering
Related URLs:
Depositing User: Sally Hughes
Date Deposited: 23 Jan 2018 09:15
Last Modified: 26 Mar 2018 15:01
URI: http://eprints.hud.ac.uk/id/eprint/34366

Downloads

Downloads per month over past year

Repository Staff Only: item control page

View Item View Item

University of Huddersfield, Queensgate, Huddersfield, HD1 3DH Copyright and Disclaimer All rights reserved ©