D110 マイクロワイヤーメッシュセンサを用いた狭隘流路内気液二相流計測(OS10 混相流動)

概要

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A micro wire-mesh sensor (μWMS) based on an electrical conductivity measurement was developed for gas-liquid two-phase flow measurement in a narrow channel. The measuring method applies a principle of conventional wire-mesh tomography, which can measure the instantaneous void fraction distributions in the cross-section of the flow channel. In μWMS for narrow two-phase flow, the electrodes are fixed on the inner wall of the narrow channel, and the local void fractions were obtained by the electrical conductivity measurement between electrodes arranged on each wall. Therefore, the flow structure and the bubble behavior can be investigated in the channel with narrow gap. In this paper, a μWMS between parallel flat plates was developed for measurements of instantaneous void fraction distributions. The measured results were compared with high speed camera images, and three-dimensional bubble distributions were reconstructed from the void fraction distributions.
2009-06-28