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首页> 外文期刊>International Journal of Multiphase Flow >Gas-liquid flow patterns in microgravity: Effects of tube diameter, liquid viscosity and surface tension
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Gas-liquid flow patterns in microgravity: Effects of tube diameter, liquid viscosity and surface tension

机译：微重力下的气液流动模式：管直径，液体粘度和表面张力的影响

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Two-phase gas-liquid flow experiments have been developed for use on NASA microgravity aircraft to allow for high speed measurement of void fraction, liquid film thickness and pressure drop as well as high-speed photography of the flow features. Numerous experiments were conducted in order to determine the effect of liquid and gas superficial velocities, tube diameter, liquid viscosity and surface tension on the occurrence of flow patterns in microgravity. The transition from bubble to slug flow was found to be affected by tube diameter for air-water and by changes in liquid viscosity and surface tension. The transition from slug to annular flow was not significantly affected by changes in tube diameter, liquid viscosity or surface tension. Void fraction based transition models were developed to predict microgravity flow patterns. Weber number based transition models were also evaluated
机译：已经开发了用于NASA微重力飞机的两相气液流动实验，可以对空隙率，液膜厚度和压降进行高速测量，并对流动特征进行高速照相。为了确定液体和气体的表面速度，管直径，液体粘度和表面张力对微重力流型的影响，进行了许多实验。发现从气泡到团状流的过渡受空气-水管直径以及液体粘度和表面张力变化的影响。管段直径，液体粘度或表面张力的变化不会显着影响从段塞到环形流的过渡。开发了基于空隙率的过渡模型来预测微重力流型。还评估了基于韦伯数的过渡模型

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