水平円管内における高クオリティ水－蒸気二相流の流動様式評価

抄録

In order to evaluate the occurrence conditions and rate of progression of flow-induced aging degradation phenomena such as pipe wall thinning and vibration fatigue in steam piping system, it is essential to accurately understand the steam flow conditions inside piping. However, the flow structure (flow pattern and sound velocity) of water-steam two-phase flow under high steam quality conditions is not sufficiently clear at present, and the occurrence and progression of degradation phenomena may not be properly evaluated. In this study, the flow pattern of water-steam two-phase flow under high steam quality conditions was visually observed to clarify the flow pattern, and the possibility of determining the flow pattern using existing flow regime map was demonstrated through comparison with existing flow regime map of water-air two-phase flow.