Phase splitting occurs during gas/liquid two-phase flow through pipe junctions and causes a gas/liquid mass ratio in the outlet legs of the junction that is different from that at the inlet. In steamflood distribution networks, this results in different steam qualities at the outlets of a junction than at the inlet. This, in turn, results in a heat distribution not in accordance with the mass distribution in the outlets of the tee. Because heat management of a steamflood project is important for both economic incentives and ultimate recovery, phase splitting must be understood and controlled. This paper presents the results of an experimental investigation conducted on phase splitting of wet steam during annular flow through a horizontal 2-in. impacting tee. The experimental operating range included inlet pressures of 400 and 600 psig, inlet mass fluxes from 1, 180 to 10, 150 lbm/(in.2-hr), inlet steam qualities from 0.2 to 0.8, and outlet vapor extraction ratios for one outlet leg from 0.2 to 0.5. From these experimental data, the relative importance of these variables on phase splitting was determined and correlations to predict the outlet steam qualities were established. These correlations predicted the experimental results of the present investigation and of Azzopardi et al. to within acceptable limits.

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