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中文摘要：
采用光纤探针测量方法对倾斜圆管（内径为50mm）内空气．水两相泡状流空泡份额分布特性进行实验研究。结果表明，截面平均空泡份额随倾斜角度的增加而减小，倾斜角度大于5。时减小速率明显减慢；竖直条件下空泡份额径向分布呈“马鞍形”，即空泡份额除在近壁区出现峰值然后迅速降低到最小值外，在其他区域几乎不随位置发生变化；倾斜条件下气泡明显向上壁面聚集，中心线上方近壁区空泡份额峰值增加，中心线下方近壁区空泡份额峰值被削弱，倾斜角度较大时甚至消失。
英文摘要：
Local void fraction of air-water bubbly flow in an inclined circular tube （ID 50mm） was obtained by optical fiber probe method. The results show that the averaged void fraction decreases with the increasing of the inclined angle, where~ its trend is moderated when the inclined angle larger than 5 degree. The void fraction nearly does not change with radius except in the near wall region where it has a peak value and falls to the minimal value in vertical condition and the typical saddle pattern profile is observed. Under inclined condition, bubbles move to the upper wall and congregate, therefore, the wall peak in the upper near wall region is enhanced nevertheless is weakened in the lower near wall region, even disappears with a larger inclined angle.
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