【摘要】 在内径为 80mm的大型水平实验环道上进行了广泛的空气 -水两相流实验 ,将采集的一定时间长度的分层、段塞、环状流型的差压波动信号 ,显示成二维图像。通过对 3 0组差压波动数据分析发现 :段塞流的信号区和背景区面积之比平均为 0 .0 2 6 ,分层流为 0 .5 3 ,环状流为 0 .3 5。段塞流信号区占整个图像面积的比值远小于其他流型 ,因此该比值可以作为判别段塞流型的一个特征参数。该方法能有效利用于段塞流流型的快速自动检测更多还原

【Abstract】 Extensive air-water two-phase flow tests were conducted on a large-sized horizontal test loop of multi-phase flows made of steel pipe of 80 mm inner diameter. The differential-pressure fluctuation signals of stratified, slug and annular flow patterns collected in a certain length of time were displayed as two-dimensional images. Through an analysis of 30 groups of differential-pressure fluctuation data it has been found that the ratio between signal zone area and background zone area has an average value of 0.026 for the slug flow, 0.53 for the stratified flow and 0.35 for the annular flow. The ratio between slug-flow signal zone and the total image area is considerably smaller than that of the other flow patterns. Consequently, this ratio can be taken as a characteristic parameter for slug-flow identification. The method under discussion can be effectively employed for the rapid and automatic detection of slug flow patterns.更多还原