Supercritical water reactor (SCWR) is one of the most promising nuclear reactor system among generation IV reactors thanks to its high thermal efficiency and simplicity. One of the main features of supercritical water is the strong variation of thermal-physical properties in the vicinity of the pseudo-critical temperature, which makes it very hard to predict the thermal-hydraulic behavior near this point. In this paper, CFD is used to investigate heat transfer of supercritical water in a 2×2 rod bundle with SST k-ε turbulence model. Two steady-state and one transient cases are simulated. The results show that there is strong non-uniform temperature distribution around the circumferential direction. Heat transfer deterioration (HTD) is found in the front of the heated section along the axial direction when the bulk temperature is near the pseudo-critical point due to secondary flow. Comparision of transient and steady-state flow shows that when the mass flux is less than 700 kg/m2s, the temperature in transient state is smaller than that in the steady-state, especially when the mass flux is 400 kg/m2s, the temperature difference is more than 10 °C.
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2016 24th International Conference on Nuclear Engineering
June 26–30, 2016
Charlotte, North Carolina, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5003-9
PROCEEDINGS PAPER
Numerical Investigation on Heat Transfer of Supercritical Water in Rod Bundle Under Suddenly Decreased Mass Flux Condition
Hui Cheng,
Hui Cheng
City University of Hong Kong, Kowloon, Hong Kong
Search for other works by this author on:
Jiyun Zhao
Jiyun Zhao
City University of Hong Kong, Kowloon, Hong Kong
Search for other works by this author on:
Hui Cheng
City University of Hong Kong, Kowloon, Hong Kong
Jiyun Zhao
City University of Hong Kong, Kowloon, Hong Kong
Paper No:
ICONE24-60315, V003T09A014; 8 pages
Published Online:
October 25, 2016
Citation
Cheng, H, & Zhao, J. "Numerical Investigation on Heat Transfer of Supercritical Water in Rod Bundle Under Suddenly Decreased Mass Flux Condition." Proceedings of the 2016 24th International Conference on Nuclear Engineering. Volume 3: Thermal-Hydraulics. Charlotte, North Carolina, USA. June 26–30, 2016. V003T09A014. ASME. https://doi.org/10.1115/ICONE24-60315
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