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The Investigation of Gas Distribution Asymmetry Effect on Coriolis Flowmeter Accuracy at Multiphase Metering
Evgeniia Shavrina1, Yan Zeng2, Boo Cheong Khoo1
1Department of Mechanical Engineering, National University of Singapore, Singapore 119260, Singapore.
Sensors (Basel, Switzerland)
|October 27, 2022
Summary
This study quantifies gas distribution asymmetry in Coriolis flowmeters (CFMs) for multiphase flows. Reducing this asymmetry significantly improves metering accuracy, decreasing errors from 34% to 10%.
Area of Science:
- Engineering
- Fluid Mechanics
- Measurement Science
Background:
- Multiphase flows require accurate metering, with Coriolis flowmeters (CFMs) showing high potential.
- Gas distribution asymmetry in CFMs can reduce multiphase flow metering accuracy.
- Previous investigations into this asymmetry were primarily qualitative.
Purpose of the Study:
- To quantitatively describe gas distribution asymmetry in various CFMs under diverse flow conditions.
- To establish a correlation between gas distribution asymmetry and CFM metering errors.
- To propose a correction method for CFM errors based on asymmetry.
Main Methods:
- Numerical simulation of gas distribution in U-shaped and triangle-shaped CFMs.
- Validation of simulation methodology against experimental data and published results.
- Investigation across bubbly, stratified, and transitional flow regimes.
Main Results:
- Increased gas volume fraction and decreased mixture flow rate enhance gas distribution asymmetry.
- A strong correlation was found between gas distribution asymmetry and observed CFM errors.
- The proposed correction method reduced metering errors from 34% to 10%.
Conclusions:
- Gas distribution asymmetry is a critical factor affecting CFM accuracy in multiphase flow.
- The developed simulation provides a quantitative understanding of this phenomenon.
- The proposed error correction method offers a practical solution for improving CFM performance.
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