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Your search keyword '"Gui, Minyang"' showing total 17 results
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17 results on '"Gui, Minyang"'

16. Improvement and validation of a sub‐channel analysis code for a lead‐cooled reactor with wire spacers.

Author

Wu, Di, Wang, Chenglong, Gui, Minyang, Lan, Zhike, Lu, Qi, Zhang, Dalin, Tian, Wenxi, Qiu, Suizheng, and Su, Guanghui H.

Subjects
HEAT transfer, FAST reactors, COOLANTS, LIGHT water reactors, PEBBLE bed reactors
Abstract

Summary: The fuel rods in the lead‐based fast reactor (LFR) are usually supported by wire spacer, and the presence of the wire results in the complexity of the thermal‐hydraulic analysis in rod bundles. In this study, several previous experimental research about lead‐bismuth eutectic flowing through the rod bundle are investigated. Based on the collected experimental data, a series of flow and heat transfer correlations in the wire‐fixed rod bundle are compared and evaluated. The recommended correlations are then implemented into the in‐house sub‐channel analysis code SACOS‐PB. Furthermore, to account for the changes in the channel cross‐section parameters caused by the wire spacer, two optional wire geometric treatments were added to the code: axially‐averaged approach and axially‐varied approach with extra cross‐flow enhancement model. 19‐rod bundle and 61‐rod bundle tests are used to validate the optimized code. The deviations for the temperature differences of cladding and coolant in internal sub‐channels are within 25%, and the axially‐varied approach shows a higher prediction accuracy, which proves that the improvement of the SACOS‐PB are reliable. This work could provide a reference for the subsequent design and development of the LFR core. [ABSTRACT FROM AUTHOR]

Published
2021
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17. Study on CHF characteristics in narrow rectangular channel under complex motion condition

Author

Wu Di, Wenxi Tian, Guanghui Su, Gui Minyang, and Suizheng Qiu

Subjects
Work (thermodynamics), Materials science, Oscillation, Critical heat flux, 020209 energy, Energy Engineering and Power Technology, Motion (geometry), Flux, 02 engineering and technology, Mechanics, Physics::Classical Physics, Industrial and Manufacturing Engineering, Physics::Fluid Dynamics, Amplitude, 020401 chemical engineering, 0202 electrical engineering, electronic engineering, information engineering, 0204 chemical engineering, Reduction (mathematics), Communication channel
Abstract

In present work, the critical heat flux (CHF) characteristics in narrow rectangular channel were theoretically investigated under complex motion condition. A three-field analysis program was developed combining with a unified form of additional forces caused by motions, and the program was validated by CHF experiment data with a better prediction accuracy. The CHF characteristics of rectangular channel were evaluated based on two types of situations: (1) oscillating inlet flow and (2) constant inlet flow with different motions including heaving, rolling and the coupled motion of heaving and rolling. The results show that the oscillation of the inlet flow has a great influence on the CHF, the increases in the amplitude and period of the inlet flow oscillation cause the dryout to occur in advance. When the inlet flow is fixed, various motion conditions have little effect on CHF for high mass flux, and the reduction of CHF does not exceed 5%. However, the CHF is obviously reduced for the low mass flux due to the significant oscillation or thinning effect of the outlet liquid film caused by motions.

Published
2020

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