912 超音波流速分布計測法を用いた混相流流量計の開発(2)(OS9-3 超音波を利用した流動場の計測(マイクロバブル・混相流),OS9超音波を利用した流動場の計測,オーガナイズドセッション)

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In this paper the liquid phase velocity and gas-liquid interface information obtained from UVP measurements are used to estimate the flowrate in a multiphase flow pipeline. The interface is found two different approaches ; by locating the maximum echo intensity at every velocity profile and by finding the maximum variance of the velocity values. The results from the echo intensity method show very good agreement with the actual flowrate. The expected average difference between the flowrate predicted by the echo intensity method and the actual flowrate is ± 5%. That between the variance of the velocity values method and the actual flowrate is -19 to 22 %.
2007-11-17