Void Fraction Measurements Performed in a Vertical Large Diameter Tube Compared to Different Predicting Correlations.

摘要

For the calculation of the two-phase flow form-resistance coefficient in a T-junction the knowledge of the void fraction in vertical tubes of the junction is needed. In the vertical branch both steady state and oscillating two-phase flow conditions were observed. The void fraction measurement are compared with the correlation given by Zuber and Findlay, Nabizadeh, and a numerical approximation of the Marchaterre and Hoglund diagram. The different correlations can be used favourably only in particular ranges of the flow regimes as the comparison with the measured values indicate. (ERA citation 10:005094)