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本文通过试验研究了竖管内淹没、流向反转以及淹没消失的滞后问题,研究了管径不同对这些过程的影响.采用无因次量J_g~*和J_L~*表达后,通过研究发现淹没开始点和流向反转点与管径无关;全部携带点与管径有关,而与注水量无关.根据试验结果给出了淹没过程中试验段内压差和流量的变化.当逐渐减少气体流量时,淹没点的消失会出现滞后,根据试验段的压差和流量变化分析了淹没消失滞后的原因和影响因素.根据试验数据整理出了相应的经验关系式.
In this paper, we study the lag problem of inundation, reversal and submergence in the vertical tube and study the influence of different tube diameter on these processes.Using the dimensionless quantities of J_g ~ * and J_L ~ *, we found that the inundation began Point and flow reversal point has nothing to do with diameter; all carrying point is related to tube diameter, but has nothing to do with water injection.According to the test results, the pressure drop and flow rate in the test section during submergence are given.When the gas flow is gradually reduced , The disappearance of the submerged point will lag behind, and the reasons and influencing factors of submerged disappearance lag are analyzed according to the pressure difference and the flow rate change in the experimental section.According to the experimental data, the corresponding empirical relationship is sorted out.