STUDY ON ROTATING CONDENSER WITH A SCRAPER.

被引：0

作者：

Izumi, Ryotaro ^{[1
]}

Maeda, Hayato ^{[1
]}

Yamashita, Hiroshi ^{[1
]}

机构：

[1] Nagoya Univ, Dep of Mechanical, Engineering, Nagoya, Jpn, Nagoya Univ, Dep of Mechanical Engineering, Nagoya, Jpn

来源：

Memoirs of the Faculty of Engineering, Nagoya University | 1984年 / 36卷 / 01期

关键词：

FLOW OF FLUIDS - Films - HEAT TRANSFER - Optimization;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A rotating condenser with a scraper is considered as a new method used to augment condensation heat transfer. An analysis is made of the case where the condensate film on vertical and horizontal rotating cylinders is scraped off mechanically by a plate. In the case of the vertical cylinder, an analytical solution for transient film condensation on a vertical plate is obtained and is applied to the infinitesimal element on the outer surface of the vertical cylinder. The mean Nusselt number is calculated by integration over the whole surface of the cylinder. In the case of the horizontal cylinder, an ordinary differential equation for the condensate film thickness is derived with several incidental conditions and is integrated by a numerical method. The condensate state is classified according to the combination of the conditions. The enhancement due to scraping is expressed in terms of the mean Nusselt number ratio, and the effects of rotation speed and the temperature difference between the vapor and the condenser surface are examined. The effects of the unscraped film thickness and the position of the scraper on the vertical and the horizontal rotating cylinder are also examined.

引用

页码：1 / 35