マルチウェイブ超音波流速分布計測法を用いた気液二相流動計測の試み(FR2 計測制御の最先端)

概要

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A new technique for multi-phase flow measurement based on the ultrasonic Doppler method(UVP method) is proposed. Using different sizes(frequency) of ultrasonic sensor for the UVP measurement, the measured, data apparently differ. With a change in the measurement volume, the velocity PDF significantly changes. Applying this method for multi-phase flow, several kinds of particles which sizes are greatly different can be measured for each velocity distributions. To measure each velocity at the same time and position, the Multi-wave TDX is newly developed. Using the Multi-wave TDX, this method is utilized for the measurement of bubbly flow in vertical pipe. To confirm the accuracy of each velocity measurement, the velocity PDFs are calculated. The results clarified that this method has high applicability.
2004-06-22