摇摆状态下矩形通道内弹状流压力模型

本文通过可视化方法对竖直与倾斜条件下矩形通道内弹状流单元的参数进行研究,尝试给出摇摆状态下矩形通道内弹状流压力模型。通过图像处理给出气弹段空泡份额以及两相速度的计算关系式,并验证漂移流模型在液弹段的适用性,给出弹状流单元的长度份额以及空泡份额的计算关系式。根据实验结果给出摇摆条件下矩形通道内弹状流压力组分的模型,并重点分析摩擦压降模型的适用程度。结果表明,弹状流压力模型可很好地预测摇摆条件下矩形通道内的压力。

Pressure Model of Slug Flow in Rectangular Channel in Rolling Motion

The visualization method was used to investigate the parameters of slug flow unit in rectangular channel （40 mm×3 mm） under vertical and inclined conditions, aiming at establishing the pressure model of slug flow in rectangular channel in rolling motion. The calculation correlations for void fraction and two-phase velocity for gas slug segment were acquired, and the applicability of drift flux model was confirmed for liquid slug segment. The length fraction and void fraction of slug flow unit were calculated. According to the experiment results, the pressure model of slug flow model was established, and the predicted frictional pressure drop turned out to be in a good agreement with the experiment value.