Two-Phase Pressure Drop Characteristics in Circular Tube under Rolling Motion
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摘要: 开展了摇摆条件下圆管通道内气-液两相压降特性实验研究,获得了摇摆条件下实验段内瞬时及时均压降。构建了摇摆条件下两相压降计算模型构建,与实验结果对比符合很好。根据实验数据和模型计算结果分析摇摆条件对两相压降特性的影响规律,发现摇摆条件下通道内瞬时总压降呈现周期性波动,但其时均值和静止时相比偏差不大。进一步分析发现,摇摆条件下摩擦压降基本不变,摇摆运动引入的附加压降可忽略不计,而摇摆条件下重位压降的周期性波动是总压降出现周期性波动的原因。Abstract: An experimental study on the pressure drop in the circular tube was carried out under rolling condition,and the transient and time averaged data were obtained.The pressure drop calculation model under rolling condition was established and agreed well with the experimental data.The effect of rolling motion on the pressure drop characteristics was researched by analyzing the experimental and calculation results.It found that the cyclical fluctuation occurs in the transient total pressure drop,while the deviation of average total pressure drop is very small compared with static condition.By analyzing the transient total pressure drop and its composition,it is found that the friction pressure drop is almost constant under rolling condition;the additional pressure drop caused by rolling motion can be ignore;and the fluctuation of gravity pressure drop is the reason of total pressure drop fluctuation.
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Key words:
- Two-phase flow /
- Pressure drop /
- Rolling motion
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