고분자물질 첨가에 의한 유동특성에 관한 연구

다국어 초록 (Multilingual Abstract)

The phenomena of drag reduction using small quantities of a liner macromolecules has attracted the attention of many experimental investigations. On the other hand drag reduction in two phase flow can be applied to the transport of crude oil, phase change system such as chemical reactor, pool and boiling flow, and to flow with cavitation which occurs pump impellers. But the research on drag reduction in two phase flow is not sufficient. The purpose of the present work is to evalu-ate the drag reduction by measuring pressure drop, void fraction, mean liquid velocity and turbu-lent intensity whether polymer additives a horiwntal single and two phase system or not. Flow pattern of air-water two phase flow was classified by electrical conductivity probe signal. Velocia-ties and turbulent intensities of signal were measured simultaneously with a Hot-film anemome-ter.<br/>