Abstract: An experimental and theoretical investigation on slug velocity measurement method in horizontal pipe was conducted.By analysis of the differential pressure signal, the low to high leading edge in differential pressure signal curve was found to correspond to liquid slug’s arriving at the upstream location of differential pressure transducer and the high to low leading edge correspond to liquid slug’s leaving from the downstream location of differential pressure transducer.The pulse width of differential pressure signal was the time in which a liquid slug moved from upstream location to downstream location of pressure transducer, and the product of slug velocity and pulse width was the sum of slug length and the distance of between two differential pressure transducers.By analysis of correlation velocity,it was found that the result obtained from conductance probe signal was the average of the slug velocity and interface wave velocity in liquid film section, the result obtained from differential pressure was the slug velocity and the result obtained from pressure signal was random.A good agreement was obtained between the experimental data of air-water, air-diesel oil, air-lubricating oil and the data of other authors.

Key words:

气液两相流, 段塞流, 差压, 互相关, 液塞速度, 液塞长度

摘要： 分析了压力波动信号互相关求液塞速度存在的不足，引入了差压波动分析法，明确了液塞到达和离开上、下游测压点的时刻与差压波动信号起峰点及落峰点位置的关系；分析了电导探针信号、差压信号和压力信号互相关所求得的相关速度的含义，指出差压互相关得到的是液塞运动速度，电导探针信号互相关得到的是液塞速度与液膜段界面波速度的平均值，压力信号互相关得到的相关速度具有随机性；明确了差压信号脉冲宽度为液塞从传感器上游测压点运动到下游测压点的时间间隔，脉冲宽度与液塞速度的乘积为液塞长度与差压传感器间距之和.最后，按照上述方法分类，把空气-水、柴油和机械油的试验数据的分析结果与文献中报道的液塞速度和长度数据进行了对比，结果吻合得很好.

关键词:

气液两相流, 段塞流, 差压, 互相关, 液塞速度, 液塞长度