| 内容提要: |
It is of great significance to explore the flow structures in gas-liquid slug and churn flows. Aiming at this purpose, a novel plug-in optical probe and conductance sensors is designed. Furthermore, we performed experimental study of gas-liquid flows with 20mm diameter in vertical upward pipe. Simultaneously, the local gas holdup, correlation velocity and instantaneous bubble chord distribution in slug and churn flows in seven radial direction are obtained. The research results show that big deformed bubbles in churn flow spiraling up in test pipe, but sometimes they rise along pipe center just as gas slugs in slug flow. Besides, bubble chord length distributions in liquid slug of slug and churn flows are analyzed in this study. |