103 二相流のボイド率の非線形時系列解析に必要な断面測定数(G05-1 気泡・液滴・粒子,G05 流体工学)  [in Japanese] 103 Required cross-sectional measurement points for nonlinear time series analysis of two-phase flow void fraction  [in Japanese]

Applying an optimal delay time reconstruction method and a point correlation dimension method to void fraction time series greatly improves the reliability of analysis. In this paper, required cross-sectional measuring points have been investigated.. We found 9-point averaging void fraction time series is sufficient for the analysis. One-point void fraction time series were also analyzed. When the air flow rate is low, all estimation results, except in the near area of a wall, passed the surrogate data test.