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在下降管中产生大型气泡时，标准偏差会有急剧增加的现象。The standard deviation increased sharp in the formation of large gas bubbles in the downcomer.

针对目前板式塔降液管研究的进展情形，提出了一些关于降液管研究方向的见解。Based on the advancement of the downcomer, some opinions of the downcomer research were presented.

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对水流的接近工业规模的悬挂式自液封降液管进行了扼流试验。The chocking experiments of an approximating industrial scale pendant water downcomer was performed.

研究开发了板式塔降液管机械消泡板组件。A new structural component settled in the downcomer of tray column for mechanical defoaming was developed.

因此，悬挂式降液管液自封标准既应限制漏气量，还应限制气液堵塞。Hence, not only bubbling but also bridging shall be restricted for the seal criterion of hanging downcomer.

为了通过高液量，塔板设计的关键是降液管结构、尺寸和布置。The key factors for designing the tray with high liquid capacity are downcomer configuration, specifications and layout.

琢磨了压力容器降落环腔的壁面换热特性，数值模拟与实验结果吻合良好。Heat transfer characteristics in the RPV downcomer were studied and the numerical results well matched the experimental data.

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通过流动可视化实验，得到了安注流速，下降环腔流速以及含气率对环腔内流动形态的影响。In flow visualization experiment, it is found that flow rate of safety injection has major effect on flow regime in downcomer.

在潮湿的季节，千足虫会从下水道和绿化地带向你的工作、生活空间侵入，成群成片的数目会使你感到毛骨悚然。In moist season, millipede would invade your home from downcomer and green belt around home. Swarm millipedes would let you feel thrillingness.

以往徐崇嗣提出的自封线以降液管几乎不漏气作为自封点。The previous seal line proposed by Xu is too conservative, in which the criterion of almost not allowing the vapor to leak through the downcomer was set.

采用毛细管光电检测技术，测定了弓形降液管内气含率的三维分布。The three dimensional distribution of gas holdup in segment downcomer has been measured by using the capillary probe and the photoelectrical detect technique.

单溢流塔板和双溢流中央降液管塔板上液体的平均停留时间分布相当复杂，而双溢流边降液管塔板上的液体流动则比较均匀。Complicated mean RTD profiles on single-pass tray and on two-pass center downcomer tray are observed, but relatively uniform flow appears on side downcomer tray.

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全喷射区内，气速影响溢流管和溢流锥的溢流能力，而使气速明显地影响塔板有效压降。In fully spray region, gas flow affects the liquid overflow capacity in the downcomer or conical over flow device, hence affects the pressure drop significantly.

该模型为体现其自然循环的特性，将下降段与上升段区分开，并假定两者之间不存在质量和能量的交换。In order to research its natural circulation, the downcomer part and the riser part is distinguished, where there are no mass and energy transferred between them.

经查，这果然是个以落水管和空调外机为路径，撬窗入室的盗窃团伙。After looking up, this is really take outside the downcomer and the air conditioning machine as a way, skids burglary gang which the window enters the inner rooms.

这些数据显示，与塔底的降液管相比，其余的中心降液管中存在浓稠的、低充气率的液体。But the data showed that the rest of the centre downcomers had a layer of more dense, less aerated liquid suspended in the middle rather than at the bottom of the downcomer.

下降室和上升室的截面积比，底部系数，高径比这些几何参数和表观气速都与细胞的生长紧密相关。The ratio of downcomer to riser cross sectional area, the bottom clearance and the ratio of height to diameter of the reactor are proved to be important of the cell growth behavior.

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介绍了分散降水管管座角焊缝超声波检验存在的问题及在检验过程中获得的探伤经验。The problems occurred in ultrasonic flaw detection tests of decentralized downcomer fillet welding seats and the flaw detecting experience obtained in these tests are also introduced.

比较了弓形、半环形和径向形降液管对塔板效率的影响，介绍了板式塔中新型降液管的主要形式、结构及优缺点。Arc, semi-annular and radial downcomers' affections on the tray efficiency were compared, the main style, structure, advantage and disadvantage of the new downcomer in tower were introduced.

介绍了国产化大氮肥水煤浆气化炉锥底砖、激冷环和降落筒在使用中出现的问题。The problems are presented of the bricks on the conical bottom of the localized coal-water slurry gasifier, quench ring and downcomer cylinder in operation in the large nitrogenous fertilizer plant.