2010 Volume 60 Issue 2 Pages 29-38
The full scale tests were carried out to grasp behavior of water film supplied by water discharge system under heating conditions. The specimen was a steel plate of 2438 mm height, 1219 mm width and 6 mm thickness. The intermediate furnace at Tokyo University of Science was used as radiation panel. The radiation panel was placed parallel to the specimen at some distance. The experimental conditions have changed the heat flux rate from radiation panel to specimen covered with water film, the water supply rate gushed from water discharge head and so on. The water film was almost uniform from the top of the specimen to the bottom by using this water discharge system. As the results of experiments, the behavior of water film is clearly involved to the water supply rate and the relation could be marshaled by using Reynolds number based on a simple viscous layer model. The water film temperature became higher so that the water supply rate decreases. Based on the experiment results the empirical formula has been developed to calculate the temperature-rise of water under any heating conditions.
