1) film condensation heat transfer/horizontal tube
膜状凝结换热/水平管
2) dropwise condensation heat transfer
滴状凝结换热
1.
A theoretical model is developed for the dropwise condensation heat transfer on the horizontal circular surface with radial gradient surface energy based on the heat transfer model of individual condensate drop and the size distribution model of condensate drop on homogeneous condensation surface.
在均质表面上的单个球缺形液滴换热模型和液滴通用尺度分布规律的基础上,结合梯度表面能材料表面上的液滴分布和凝结换热特性,得到了圆形径向梯度表面能材料表面上的滴状凝结换热计算式。
2.
A theoretical model was developed for the dropwise condensation heat transfer performance on the horizontal surface with gradient surface energy based on the heat transfer model of individual condensate drop and the size distribution model of condensate drops.
本文在均质表面的单个球缺形液滴换热模型和液滴通用尺度分布规律的基础上,结合梯度表面能材料表面的液滴分布和凝结换热特性,得到了一维水平梯度表面能材料表面上的滴状凝结换热计算式。
3) film condensation
膜状凝结
1.
Influence of Marangoni effect on film condensation inside a circular pipe;
Marangoni效应对圆管内膜状凝结的影响
2.
The heat transfer characteristics of film condensation in ainless steel micro/mini tubes with inside diameters 289-997μm was investigated experimentally.
基于实验结果, 分析了换热温差、蒸汽进口雷诺数Rein和管径对管内膜状凝结换热系数的影响,发现温差对管内膜状凝结换热的影响很小, Nu随蒸汽进口雷诺数Rein增加而增大,随管径减小而降低,而对流换热系数随管径减小而显著增大。
3.
When the boundary layer theory is used to study the film condensation on the vertical plate, the error was found much bigger in the case of middle or small figures of Re or on the front of the condensation field.
在用边界层理论研究竖壁膜状凝结理论时 ,发现中小雷诺数下以及凝结前沿区误差较大 。
4) condensing inside horizontal tubes
水平管内凝结
5) condensation heat transfer
凝结换热
1.
Experimental investigation on condensation heat transfer in horizontal microfin and smooth tube with refrigerant R22;
R22在水平微肋管和光管内凝结换热的实验研究
2.
Marangoni condensation heat transfer for binary mixture vapor at different vapor pressures;
不同蒸气压力下的Marangoni凝结换热特性
3.
Investigation of condensation heat transfer of horizontal titanium circular-grooved tube;
钛波槽管水平管外凝结换热的实验研究
6) condensation
[英][,kɔnden'seɪʃn] [美]['kɑndɛn'seʃən]
凝结换热
1.
Flow and condensation of vapor with high partial pressure non-condensable gas in a separate heat pipe;
含高分压不凝气体的蒸汽在分离式热管内凝结换热
2.
Heat transfer coefficient and pressure drop were measured during condensation of steamin a vertical copper tube with and without Twined Wire Coil Inserts (TWCI), respectively.
1前言大空隙率多孔体管内插物-绕花丝内插物，被认为是强化管内凝结换热的最有效途径之一[1]。
3.
An experimental study is reported on forced-convective condensation heat transfer of R134a inside a horizontal smooth tube, using a 13m long, 11mm inside diameter test tube.
但是关于R134a的传热性能的研究还不够充分，尤其是对凝结换热，一些现有的关联式还不能很有把握地推广应用于R134a，还必须进行大量的研究工作，以查明R134a的传热特性。
补充资料：凝结换热
蒸汽在低于其饱和温度的壁面上凝结时的换热过程，是具有相变特点的两相流换热。蒸汽凝结时放出汽化潜热而凝成液体。如凝结液能润湿壁面，则在壁面上形成一层液膜，受重力作用向下流动。液膜表面上蒸汽的凝结,通过液膜向壁面传递热量,这称为膜状凝结换热。如果凝结液不能润湿壁面,则将聚成珠状滚落,称为珠状凝结换热。这时蒸汽仍能直接在壁面上凝结，热量的传递没有液膜的阻隔，换热强度可比膜状凝结高至10倍。但珠状凝结是很难保持的，只有金属蒸气的凝结、渗入某种有机物（如油酸、辛醇等）蒸汽的水蒸汽在金属壁面上的凝结、水蒸汽在涂有硅油、聚四氟乙烯等壁面上凝结，才是珠状凝结。如果水蒸汽中含有不凝结气体，则换热会大大减弱，所以在凝汽设备中必须将不凝结气体排除。工业设备中常见的水蒸汽或其他蒸汽在金属壁面上的凝结一般都是膜状凝结。蒸汽在竖管外表面上凝结时，液膜沿管长不断增厚,换热逐渐减弱。对于横管,因管径有限，液膜不会太厚，所以横管的凝结换热系数较竖管为大。蒸汽流动时，如方向与液膜的流动方向相同，则会使液膜减薄，换热增强；如方向相反，则液膜增厚，换热减弱。蒸汽流速较大时会把液膜吹散，使换热增强。蒸汽在横管束中凝结时，流过各排管子的蒸汽速度是依次减小的，同时，下面的管子受上面管子滴下的凝结液的影响，膜层变得较厚而又有扰动。管束对凝结换热的影响是一个相当复杂的问题，尚未研究出普遍适用的规律。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条