Specifics of supercritical parameters of a flow under non-uniform heating of the fuel assembly channel walls

1Avramenko, AA, 1Kondratieva, EA, 1Kovetskaya, MM, 1Tyrinov, AI, 1Vasilchenko, VV
1Institute of Engineering Thermophysics of the NAS of Ukraine, Kyiv
Dopov. Nac. akad. nauk Ukr. 2014, 10:76-81
Section: Heat Physics
Language: Russian
Based on the RNG $k$-$\varepsilon$ turbulence model, computer simulations are performed. Their results include distributions of the hydrodynamical and heat transfer parameters for a supercritical water flow in the seven-rod fuel assembly. The simulations were performed under steady state conditions at uniform and non-uniform heating of the channel walls, which enabled us to reveal effects of the heating on the distribution of the coolant properties. It is shown that the non-uniform heating an causes azimuthal non-uniformity of the heat transfer coefficient.
Keywords: fuel assembly channel, heating, supercritical parameters

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