水平管道段塞流特征参数的压差波动分析

分析了压力波动信号互相关求液塞速度存在的不足，引入了压差波动分析法；明确了液塞到达和离开上、下游测压点的时刻与压差波动信号起峰点与落峰点位置的关系；指出了压差信弓脉冲宽度为液塞义到达上游测压点和液塞尾离开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．把空气－水、柴油和机械油的试验结果与文献中经验关系式进行了对比，验证了该测量方法的正确性．

INVESTIGATION ON THE METHOD FOR SLUG VELOCITY MEASUREMENT OF GAS-LIQUID TWO-PHASE FLOW BY EIFFERENTIAL PRESSURE FLUCTUATION SIGNAL IN HORIZONTAL PIPELINE

An experimental and theoretical investigation of the method for slug velocity measurement of gas-liquid two-phase flow in horizontal pipe was conducted. By analysis of the differential pressure signal, it is found that the low to high leading edge in differential pressure signal curve is corresponding to liquid slug's arriving at the upstream location of differential pressure transducer and the high to low leading edge is corresponding to liquid slug's leaving from the downstream location of differential pressure transducer. The pulse width of differential pressure signal is the time interval in which a liquid slug moves from upstream location to downstream of pressure transducer, and the product of slug velocity and pulse width is the sum of slug length and the distance of between two differential pressure transducers. By using of the multiple regression method, a new formula of slug velocity, slug frequency and slug length was proposed. A good agreement was arrived between correlation and our experimental data of air-water, air-diesel oil, air-lubricating oil and other authors.