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PIV investigations on the turbulent mixing of two opposing flows inside a scaled chimney model of a research reactor

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Title PIV investigations on the turbulent mixing of two opposing flows inside a scaled chimney model of a research reactor
 
Creator SENGUPTA, S
KHAN, MH
VELURI, VK
VIJAYAN, PK
AGRAWAL, A
BHATTACHARYA, S
 
Subject JETS
Jet height
Mixing
Opposing flows
PIV
Square chimney
Turbulence
 
Description Experiments and numerical simulations were carried out to study the turbulent mixing behaviour of two opposing flows inside a 1/18th scaled down model of square chimney structure of a pool type research reactor. The chimney design facilitates drawing pool water in the downward direction, thereby suppressing the upward flow of radioactive water jet to limit the radiation field at the reactor pool top. Experiments were performed using the particle image velocimetry (PIV) technique, considering a mass flow rate of 0.5 kg/s and 1.0 kg/s for the upward flowing water from the core, which corresponds to Reynolds number of 20000 and 40000 respectively. Mass flow ratios of the downward flow and the upward flow were 0.00, 0.05, 0.1 and 0.15. Ply data shows the effect of mass flow ratio on the velocity distribution inside the chimney model. The experiments showed that the jet height decreased with increase in downward flow due to the opposing momentum of downward flow against the upward jet. The effects of Reynolds number on the jet height were found to be marginal. It was observed that both kappa-epsilon and kappa-omega turbulence models were able to simulate the experimental data of turbulent mixing. (C) 2015 Elsevier Inc. All rights reserved.
 
Publisher ELSEVIER SCIENCE INC
 
Date 2016-01-14T13:44:37Z
2016-01-14T13:44:37Z
2015
 
Type Article
 
Identifier EXPERIMENTAL THERMAL AND FLUID SCIENCE, 63,115-132
0894-1777
1879-2286
http://dx.doi.org/10.1016/j.expthermflusci.2015.01.014
http://dspace.library.iitb.ac.in/jspui/handle/100/17647
 
Language en