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Study on electrodynamic sensor of multi-modality system for multiphase flow measurement.

Xiang Deng¹, Dixiang Chen, Wuqiang Yang

¹School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China.

The Review of Scientific Instruments

|January 10, 2012

Summary

Accurate multiphase flow measurement is challenging. A new adaptive multi-modality sensor (ECT, ERT, electro-dynamic) offers improved gas/solids and gas/liquid flow analysis, overcoming limitations of dual-modality systems.

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Area of Science:

Engineering
Physics
Flow Measurement

Background:

Multiphase flow measurement (gas/solids, gas/liquid, liquid/liquid) presents significant challenges.
Electrical Capacitance Tomography (ECT) and Electrical Resistance Tomography (ERT) have limitations based on fluid conductivity.
Previous attempts using dual-modality ECT/ERT for velocity profiling via cross-correlation are hindered by flow complexities.

Purpose of the Study:

To discuss limitations of dual-modality ECT/ERT systems for multiphase flow analysis.
To introduce a novel adaptive multi-modality sensor system.
To detail the design and components of the electrodynamic sensor within the multi-modality system.

Main Methods:

Analysis of issues with dual-modality ECT/ERT and pixel-based cross-correlation.
Development and description of a new adaptive multi-modality sensor (ECT, ERT, electro-dynamic).
Detailed discussion of electrodynamic sensor components: optimum electrode design, electrostatic charge amplifier, and signal processing.

Main Results:

Identified limitations in existing dual-modality tomography systems for complex multiphase flows.
Proposed a novel adaptive multi-modality sensor for enhanced flow measurement.
Presented initial experimental results for the new sensor system.

Conclusions:

Dual-modality ECT/ERT systems face significant challenges in accurately measuring complex multiphase flows.
The newly developed adaptive multi-modality sensor offers a promising solution for improved gas/solids and gas/liquid flow measurement.
Further research and experimental validation are warranted for the electrodynamic sensor and the integrated multi-modality system.