A THz-based multiphase flow meter targeting high gas void fraction applications

Faisal Shehaz; Imran Saied; Qasim Al Bloohsi; Abdulaziz AlAmri

doi:10.1117/12.2566660

3 March 2020 A THz-based multiphase flow meter targeting high gas void fraction applications

Faisal Shehaz, Imran Saied, Qasim Al Bloohsi, Abdulaziz AlAmri

Proceedings Volume 11299, AI and Optical Data Sciences; 1129918 (2020) https://doi.org/10.1117/12.2566660
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

This paper suggests a new concept of high GVF measurement and flow regime determination using a Terahertz-based imaging system. It explores the fact the gas phase has very low absorption of THz waves, while it yields an absorption factor that is proportional to the amount of liquid. The recent availability of low cost THz imaging systems that can generate two dimensional (2D) images at more than 100 frames/seconds make them well suitable for flow metering applications. A dedicated Support Vector Machine (SVM) was assessed using an in-house multiphase flow loop. The corresponding results reveal that the SVM yields very accurate results where a maximal error of 0.46 % for GVF in the GVF range from 80 to 100% could be achieved. In addition it could accurately determine all three type of flow regimes (i.e. annular, stratified, or slug flow). This suggests that the technique can be considered as a good candidate for next generation flow metering and imaging of multiphase flows.

Citation Download Citation

Faisal Shehaz, Imran Saied, Qasim Al Bloohsi, and Abdulaziz AlAmri "A THz-based multiphase flow meter targeting high gas void fraction applications", Proc. SPIE 11299, AI and Optical Data Sciences, 1129918 (3 March 2020); https://doi.org/10.1117/12.2566660

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