Experiment study of water film/air counter-current flow heat transfer on a vertical plate for passive containment cooling system

2018 ◽  
Vol 328 ◽  
pp. 73-79 ◽  
Author(s):  
Po Hu ◽  
Kashuai Du ◽  
Shuwei Zhai ◽  
Yanhua Yang
Keyword(s):  
Heat Transfer ◽  
Vertical Plate ◽  
Current Flow ◽  
Cooling System ◽  
Water Film ◽  
Experiment Study ◽  
Flow Heat ◽  
Counter Current Flow ◽  
Counter Current

Experimental Study on Model Development for Liquid Accumulation in Steam Generator U-Tube (First Report) Condensing Counter-Current Flow in Single Vertical Pipe

2014 ◽  
Author(s):  
Tatsuya Yamaji ◽  
Kohei Yamazaki ◽  
Yasuo Koizumi ◽  
Hiroyasu Ohtake ◽  
Koji Hasegawa ◽  
...  
Keyword(s):  
Steam Generator ◽  
Current Flow ◽  
Water Film ◽  
Flow State ◽  
Water Drainage ◽  
Two Phase ◽  
Pressurized Water ◽  
Condensed Water ◽  
Counter Current Flow ◽  
Counter Current

Experiments of counter-current two-phase flow of upward steam flow and condensing downward film flow in a pipe were performed. The experiments were intended to examine water accumulation in steam generator U-tubes during intermediate and small break loss-of-coolant accidents of a pressurized water reactor. The inner diameter and the length of a test flow channel used in the experiments were 18 mm and 4 m, respectively. Experiments were performed at higher steam velocity a little than the velocity that was expected just after scram as the first trial. There was no water drainage form the test pipe to the lower plenum. All condensed water was entrained by steam to flow out from the top of the test pipe to the upper plenum. The test pipe was filled with the water lump and the water film, then these were blown up upward and the inner wall of the test pipe became dry. Again the test pipe was filled with the water lump and the water film, then these were blown up upward and the inner wall of the test pipe became dry. This process was iterated at short intervals. The flow state in the test pipe is highly chaotic and agitated. Condensed water flows up and down at high frequencies. It is indicated that to examine the time averaged void fraction and the two-phase pressure drop of the counter-current flow are required.

Hydrodynamics of gas–liquid counter-current flow in solid foam packings

2005 ◽  
Vol 60 (22) ◽  
pp. 6422-6429 ◽  
Author(s):  
C.P. Stemmet ◽  
J.N. Jongmans ◽  
J. van der Schaaf ◽  
B.F.M. Kuster ◽  
J.C. Schouten
Keyword(s):  
Current Flow ◽  
Solid Foam ◽  
Counter Current Flow ◽  
Counter Current
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