the vertical tubes 垂直圆管
vertical corrugated tubes 垂直沟槽管
parallel vertical rifled tubes 垂直并联内螺纹管
vertical water-wall tubes 垂直水冷壁管
An optical fiber probe is used to study the cross-section of oil-gas-water three-phase slug flow in vertical tubes.
利用光纤探针试验研究垂直上升管内气、水、油三相弹状流截面相份额的规律。
The purpose of this paper is to illustrate the result of the research on the slug flow in vertical tubes and to effectively guide experimental investigation and production practices in future.
目的在于全面翔实地阐述垂直管弹状流的研究结果，以期有效地指导实验研究及生产实际工作。
It is indicated that the enhanced condensation heat transfer technology on vertical tubes, when applied to vertical utility heaters, can efficiently raise the feed water temperature and save energy.
最后指出，立管冷凝强化传热技术在电站的立式加热器中应用，可以较大幅度地提高给水温度，实现节能增效。
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