Study of local pressure drop characteristics of oil-gas two-phase flow through bend

An experimental study of local pressure drop characteristics of air-water and air-oil two-phase flow through horizontal inlet, vertical upward outlet 90° bend was conducted. The inner diameter of pipe is 45 mm, the radius of curvature of bend is 300 mm. Some comparisons between the experimental data and previous models or formulations and further analyses were made. Based on experimental results, a new kind of general empirical correlation for predicting local pressure drop of air-water and air-oil gas-liquid two-phase flow through bend was proposed. A good agreement was achieved between the experimental data and the new kind of general correlation.