本文在不同蒸汽流速下对水-酒精混合蒸汽在竖直管外Marangoni凝结换热特性进行了实验研究.结果表明:在相同蒸汽压力下,混合蒸汽在竖直管外凝结换热系数随蒸汽流速的增加而增加.当蒸汽酒精浓度较低时(1%、2%、5%),凝结换热系数随流速的增加而明显增加.当蒸汽酒精浓度较高时(20%、50%),流速的增加对凝结换热系数影响较小.这主要是由于蒸汽流速在低酒精浓度下对凝结扩散层热阻的影响大于在高酒精浓度下对扩散层热阻的影响.
参考文献
| [1] | Ford J D;Missen R W .On the Conditions for Stability of Falling Films Subject to Surface Tension Disturbances; the Condensation of Binary Vapors[J].Canadian Journal of Chemical Engineering,1968,48:309-312. |
| [2] | Mirkovich V V;Missen R W .Non-Filmwise Condensation of Binary Vapors of Miscible Liquids[J].Canadian Journal of Chemical Engineering,1961,39:86-87. |
| [3] | K. Hijikata;Y. Fukasaku;O. Nakabeppu .Theoretical and experimental studies on the pseudo-dropwise condensation of a binary vapor mixture[J].Journal of heat transfer: Transactions of the ASME,1996(1):140-147. |
| [4] | Utaka Y;Kobayashi H .On Condensation Heat Transfer for Water and Ethanol Vapor Mixture[J].JSME,B,2001,67(653):141-147. |
| [5] | Junjie Yan;Yusen Yang;Shenhua Hu;Kejian Zhen;Jiping Liu .Effects of vapor pressure/velocity and concentration on condensation heat transfer for steam–ethanol vapor mixture[J].Heat and mass transfer,2008(1):51-60. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%