Behavior of Condensate and Heat Transfer on a Rotary Horizontal Tube under Dropwise Condensation

滴状冷凝下旋转水平管上的冷凝水和传热行为

• 批准号: 63550172
• 负责人: HOSOKAWA Yoshinobu
• 金额: $ 1.28万
• 依托单位: HIMEJI INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550172/
• 关键词: Phase change; Dropwise condensation; Rotary horizontal tube; Condensate behavior; Heat transfer; 滴上凝縮; 水滴

In dropwise condensation heat transfer,it is known that condensate on a condensing surface cause two significant effects,i.e., sweeping and covering effects. In this study, the correlation between the behavior of condensate and the heat transfer on a rotary condensing tube was investigated theoretically and experimentally. The behavior of condensate on the rotary tube was extremely complex. And thus, the authors proposed the essential model for calculating the behavior of condensing drops and estimated the sweeping and covering effects on the heat transfer. It was found that, in rotating a condensing tube, a sweeping action was increased and covering action was decreased with a rotation number. Therefore, the possibility of the enhancement of the heat transfer was shown by this investigation on the rotary tube under dropwise condensation.

在水滴式冷凝换热中，已知冷凝表面上的冷凝物会产生两种重要的影响，即：，清扫和覆盖效果。本文从理论和实验两方面研究了冷凝液行为与旋转冷凝管内传热之间的关系。冷凝液在旋转管内的行为极为复杂。因此，作者提出了计算冷凝液滴行为的基本模型，并估计了清扫和覆盖效应对传热的影响。结果表明，旋转冷凝管时，随着旋转次数的增加，清扫作用增大，覆盖作用减小。因此，通过对滴漏冷凝条件下旋转管强化传热的可能性进行了研究。

项目成果

Katsuhiko JINDO: "Behavior of a Water Drop on a Rotating Non-wettable horizontal tube" Trans. of JSME, Vol.54 (1988), 1826-1829.

Katsuhiko JINDO：“旋转的不可润湿水平管上水滴的行为”Trans。

Tsutomu HOSOKAWA: "Behavior of Falling Drops and Heaf Tranafer on a Rotary Horizontal Tube under Dropwise Condensation" The second KSME-ISME Fluids Engineering Conference. (1990)

Tsutomu Hosokawa：“滴状冷凝下旋转水平管上的落滴和堆转移行为”第二届 KSME-ISME 流体工程会议。

Tsutomu HOSOKAWA: "Behavior of Rivulet flowing down an inclined Non-wettable Plate (Relation between flow rate and width)" 姫路工業大学研究報告A. No.42. 70-76 (1989)

Tsutomu Hosokawa：“沿着倾斜的不可润湿板流下的溪流的行为（流速与宽度之间的关系）”姬路工业大学研究报告A.第42号（1989年）。

Tsutomu HOSOKAWA: "Behavior of Falling Drops and Heat transfer on a Rotary Horizontal Tube under Dropwise Condensation" The second KSME-JSME Fluids Engineering Conference.

Tsutomu Hosokawa：“滴状冷凝下旋转水平管上的下落液滴和传热行为”第二届 KSME-JSME 流体工程会议。

Tsutomu Hosokawa: "Behavior of Falling Drops and Hest Transfer on a Rotary Horizontal Tube under Dropwise Condensation" The second KSME-JSME Fluids Engineering Conference,to be submitted. (1990)

Tsutomu Hosokawa：“滴状冷凝下旋转水平管上的下落液滴和热传递行为”第二届 KSME-JSME 流体工程会议，待提交。