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实验研究了集输-立管系统内空气水的两相流动,将其流动结构分为稳定和非稳定两大类流型并建立宽广流速范围内的流型图;揭示了非稳定流动中不规则流型流动特性及其形成机理;集输-立管系统内液相的逐渐积累是不稳定阶段建立的关键因素,多次喷发导致系统内液量的大量减少,在低折算液速下不能及时弥补减少量是稳定阶段建立的主要因素。实验发现,中高折算速度条件下,立管整体压差波动幅度与水平管段压差波动幅度均随折算速度的增大先增大后减小;而在低折算速度条件下,则表现为单调递减的变化规律;并建立了各自相应的压差波动特性等高线图。
The two-phase flow of air-water in the gathering-riser system was experimentally studied, and its flow structure was divided into two types of stable and unstable flows and the flow pattern was established in a wide range of flow velocity. Regular flow pattern and its formation mechanism; Accumulation - the gradual accumulation of liquid phase in the riser system is the key factor in the instability phase, multiple eruptions lead to a substantial reduction in the amount of liquid system, at low conversion liquid velocity can not Timely make up for the reduction is the main factor in the stabilization phase. The experimental results show that under the condition of medium-high conversion rate, the fluctuation range of the pressure drop and the pressure drop of the riser increases first and then decreases with the increase of the conversion velocity. However, under the condition of low conversion velocity, The variation law of pressure drop was established.