Abstract: This paper described the experimental results of frictional pressure drop of steam-water two-phase flow in a high pressure water leap. The experiments were conducted under the hinted and unheated conditions. The purpose of the experiments is to check the equation of frictional pressure drop that has been as the standard hydraulic equation of frictional pressure drop in power boiler. The results showed that the equation is more convent ant and accurate to use in comparison with other frictional pressure drop equations.

Key words: 两相流动, 摩擦阻力