界面活性剤添加溶液における曲がり管ならびに異径管の流動抵抗特性

抄録

It is known that flow drag reduction effect (DR effect) is caused by adding a small amount of surfactant in a flow in a pipeline for a liquid. The effect of drag reduction by the surfactant solution flow has attracted attention as an efficient use of energy, such as reducing the power of the pump. When the surfactant solution flow is applied to a heat exchanger such as a factory or a building, not only a straight pipe but also a different diameter pipe and a curved pipe are used for the pipe. In this study, we investigated drag reduction flow characteristics of curved pipe and different diameter pipe at 500 ppm concentration of surfactant solution flow using square cross section acrylic pipe with dimensions 40 × 40 and 60 × 60 mm from the pressure distribution.