Abstract
In this paper an experimental study on two-phase flow pressure drop characteristics has been performed in a triangular-array rod bundle geometry under various flow conditions (P = 5–9 MPa and G = 100–350 kg·m−2·s−1). Total, gravitational and frictional pressure drops are obtained by measurement methods. The effects of pressure, mass flux and thermodynamic quality on pressure drop were investigated in detail, and the proportions of gravitational and frictional pressure drop in total pressure drop are analyzed. Meanwhile, an assessment of eight existing correlations for two-phase friction multiplier calculation is carried out against the present data. The results show that Tran correlation has a relatively better performance when predicting the present data, while the accuracy is still not good enough. In views of this, a newly-developed correlation based on the Tran correlation has been proposed for the two-phase friction multiplier calculation in rod bundle geometries, which is proved to agree with the present data well.
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