CORRELATION OF ADIABATIC 2-PHASE PRESSURE-DROP DATA USING THE FRICTIONAL LAW OF CORRESPONDING STATES

A method, based on that developed for single-phase flow, is proposed f or the correlation of two-phase frictional pressure drop data. It is v alidated using air-water data obtained on small horizontal passages of rectangular and circular cross-section for values of total mass flux G in the 50-2000 kg/m2s range. The pressure drop for air- water mixtur es can be predicted from the proposed correlations provided the critic al quality (or superficial gas Reynolds number) and the critical press ure gradient for transition from bubble/plug-to-slug flow are known. A comparison of the proposed method with that of Lockhart and Martinell i is presented and discussed.