TY - JOUR
T1 - Study on electrodynamic sensor of multi-modality system for multiphase flow measurement
AU - Deng, Xiang
AU - Chen, Dixiang
AU - Yang, Wuqiang
PY - 2011/12
Y1 - 2011/12
N2 - Accurate measurement of multiphase flows, including gassolids, gasliquid, and liquidliquid flows, is still challenging. In principle, electrical capacitance tomography (ECT) can be used to measure the concentration of solids in a gassolids flow and the liquid (e.g., oil) fraction in a gasliquid flow, if the liquid is non-conductive. Electrical resistance tomography (ERT) can be used to measure a gasliquid flow, if the liquid is conductive. It has been attempted to use a dual-modality ECTERT system to measure both the concentration profile and the velocity profile by pixel-based cross correlation. However, this approach is not realistic because of the dynamic characteristics and the complexity of multiphase flows and the difficulties in determining the velocities by cross correlation. In this paper, the issues with dual modality ECTERT and the difficulties with pixel-based cross correlation will be discussed. A new adaptive multi-modality (ECT, ERT and electro-dynamic) sensor, which can be used to measure a gassolids or gasliquid flow, will be described. Especially, some details of the electrodynamic sensor of multi-modality system such as sensing electrodes optimum design, electrostatic charge amplifier, and signal processing will be discussed. Initial experimental results will be given. © 2011 American Institute of Physics.
AB - Accurate measurement of multiphase flows, including gassolids, gasliquid, and liquidliquid flows, is still challenging. In principle, electrical capacitance tomography (ECT) can be used to measure the concentration of solids in a gassolids flow and the liquid (e.g., oil) fraction in a gasliquid flow, if the liquid is non-conductive. Electrical resistance tomography (ERT) can be used to measure a gasliquid flow, if the liquid is conductive. It has been attempted to use a dual-modality ECTERT system to measure both the concentration profile and the velocity profile by pixel-based cross correlation. However, this approach is not realistic because of the dynamic characteristics and the complexity of multiphase flows and the difficulties in determining the velocities by cross correlation. In this paper, the issues with dual modality ECTERT and the difficulties with pixel-based cross correlation will be discussed. A new adaptive multi-modality (ECT, ERT and electro-dynamic) sensor, which can be used to measure a gassolids or gasliquid flow, will be described. Especially, some details of the electrodynamic sensor of multi-modality system such as sensing electrodes optimum design, electrostatic charge amplifier, and signal processing will be discussed. Initial experimental results will be given. © 2011 American Institute of Physics.
U2 - 10.1063/1.3665207
DO - 10.1063/1.3665207
M3 - Article
SN - 1089-7623
VL - 82
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
IS - 12
M1 - 124701
ER -