Abstract
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.
