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气液两相泡状流的主要特征是连续液相中携带散布其中的细小气泡,气泡的存在不仅对气液两相流的传热、传质及阻力特性有很大的影响,而且对两相流动的稳定性也有很大的影响.前人有关泡状流的研究大多偏重于两相流的平均参数,对于两相流局部统计参数如局部空隙率等参数的变化规律是近年来两相流研究的新趋势.对于垂直管内的流动已经积累了相当数量的数据,而同样有广泛应用的水平管内相分布规律还知之甚少.气泡对气液两相流的传热、传质及流动结构影响机理的研究必须以了解相分布及气泡的局部统计参数为前提,同时对相分布特性的深人研究也为气液两相流的数学模型化提供实验依据.本文以空气、水为工质,研究水平管内气液两相流的相分布特性,给出了典型泡状流的时域信号图,研究了相分布随气液两相流量的规律变化,并与前人的有关结果进行了比较.
The main feature of the gas-liquid two-phase bubbly flow is that the continuous liquid phase carries tiny bubbles dispersed therein. The existence of bubbles not only has a great influence on the heat and mass transfer and resistance characteristics of the gas-liquid two-phase flow, The stability of phase flow also has a great impact.Previous studies on bubble flow are mostly biased on the average two-phase flow parameters for the two-phase flow local statistical parameters such as local porosity and other parameters change law in recent years, two-phase A new trend in flow research has been that a considerable amount of data has been accumulated for the flow in a vertical tube and little is known about the phase distribution in a horizontal tube that is also widely used.The heat transfer, mass transfer, and flow of gas bubbles The study on the mechanism of structure influence must be based on the understanding of the phase distribution and local statistical parameters of gas bubbles, and the in-depth study of the phase distribution also provides experimental evidence for mathematical modeling of gas-liquid two-phase flow.In this paper, The phase distribution characteristics of gas-liquid two-phase flow in horizontal tubes are studied. The time-domain signal diagrams of typical bubble flow are given. The phase distribution changes with the regularity of gas-liquid two-phase flow, Compared.