【摘要】 在实际应用中,受环境作业影响,气力提升不可避免地采用弯曲管道。有鉴于此,该文采用数据采集测试系统通过压力传感器对三种不同提升管内压力进行实验研究,探讨其局部弯曲位置对气力提升性能的影响,分析管内的压力波动特征,进而阐明其中流型的变化机理及规律。实验结果表明:气力提升性能受运行参数和结构参数的影响显著;管内压力时域图因气流量和淹没率变化而显著改变,在弹状流时呈现明显的低频、大幅振荡特征;且存在压力变化转折点;由时域图和压力分析可知管内流型发生两次转变;C型提升系统率先进入弹状流,故管道局部弯曲位置应在进气口之下为宜。更多还原

【Abstract】 In practical application, pneumatic lifting inevitably adopt bending pipe affected by environment. Against this, study on the effect of local bending position of the pneumatic lifting performance. Analysis the pressure fluctuations within its pipe. Then study the change mechanism and rules of pattern. The experimental results show that air lifting device performance is suffered by operation parameters and structure parameters. Pipeline pressure changes significantly on the time-domain diagram because of the change of gas flow and the submergence ratio. The slug flow shows low frequency and sharp oscillation characteristics clearly. The effect of air flow on pipe pressure is smaller than submergence ratio. There exists a turning point for the pressure change. Pipeline local bending position should place under the air inlet.更多还原