Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
권호 표지
DOI QR코드

DOI QR Code

Numerical simulation of natural convection around the dome in the passive containment air-cooling system

  • Chunhui Dong (School of Nuclear Science and Technology, Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University) ;
  • Shikang Chen (School of Nuclear Science and Technology, Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University) ;
  • Ronghua Chen (School of Nuclear Science and Technology, Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University) ;
  • Wenxi Tian (School of Nuclear Science and Technology, Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University) ;
  • Suizheng Qiu (School of Nuclear Science and Technology, Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University) ;
  • G.H. Su (School of Nuclear Science and Technology, Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University)
  • Received : 2022.06.27
  • Accepted : 2023.04.16
  • Published : 2023.08.25
Download PDF
⟨ Previous Next ⟩

Abstract

The Passive containment Air-cooling System (PAS) can effectively remove the decay heat of the modular small nuclear reactor after an accident. The details of natural convection around the dome, which is a key part of PAS, were investigated numerically in the present study. The thermal dynamics around the dome were studied through the temperature, pressure and velocity contours and the streamlines. Additionally, the formation of the buoyant plume at the top of the dome was investigated. The results show that with the increase of Ra, the lift-off point moves toward the bottom of the dome, and the eddy under the buoyant plume grows larger gradually, which enhances the heat transfer. And the heat transfer along the dome surface with different truncation angles was investigated. As the angle increases, the heat transfer coefficient becomes stronger as well. Consequently, a newly developed heat transfer correlation considering the influence of truncation angle for the dome is proposed based on the simulated results. This study could provide a better understanding of natural convection around the dome of PAS and the proposed correlation could also offer more predictive value in the improvement of nuclear safety.

Keywords

References

  1. J. Zhang, H. Yu, M. Wang, et al., Experimental study on the flow and thermal characteristics of two-phase leakage through micro crack, Appl. Therm. Eng. 156 (2019) 145-155.  https://doi.org/10.1016/j.applthermaleng.2019.04.055
  2. J. Zhang, R. Chen, M. Wang, et al., A code development for leak before break (LBB) leakage from supercritical to subcretical conditions, Prog. Nucl. Energy 103 (2018) 217-228.  https://doi.org/10.1016/j.pnucene.2017.11.019
  3. Y. Zhang, S. Qiu, G. Su, et al., A review on analysis of LWR severe accident, J. Nucl. Eng. Radiat. Sci. 1 (2015). 
  4. R. Chen, P. Zhang, B. Tan, et al., Steam condensation on a downward-facing plates in presence of air, Ann. Nucl. Energy 132 (2019) 451-460.  https://doi.org/10.1016/j.anucene.2019.04.055
  5. R. Chen, P. Zhang, P. Ma, et al., Experimental study of the steam condensate dripping behavior on the containment dome, Nucl. Eng. Des. 346 (2019) 131-139.  https://doi.org/10.1016/j.nucengdes.2019.03.010
  6. R. Chen, P. Zhang, P. Ma, et al., Experimental investigation of steam-air condensation on containment vessel, Ann. Nucl. Energy 136 (2020), 107030. 
  7. Y. Chen, Y. Wu, M. Wang, et al., Development of a multi-compartment containment code fro advanced PWR plant, Nucl. Eng. Des. 334 (2018) 75-89.  https://doi.org/10.1016/j.nucengdes.2018.05.001
  8. S. Wu, Y. Zhang, D. Wang, et al., Assessment of the Severe Accident Code MIDAC Based on FROMA, QUENCH-06&16 Experiments, Nuclear Engineering and Technology, 2021. 
  9. H. Sun, J. Deng, Y. Zhang, et al., Development and validation of a new module in the ATHROC fro simulation of aerosol particles removal by spray in containment, Nucl. Eng. Des. 364 (2020), 110630. 
  10. M. Tian, T. Cong, Z. Ma, et al., A new unidentified leak detection method based on the EVR ventilation condensate, Prog. Nucl. Energy 98 (2017) 11-22.  https://doi.org/10.1016/j.pnucene.2017.02.002
  11. G.D. Raithby, K.G.T. Hollands, A general method of obtaining approximate solutions to laminar and turbulent free convection problems, Adv. Heat Tran. 11 (8) (1975) 265-315.  https://doi.org/10.1016/S0065-2717(08)70076-5
  12. T. Zhang, H. Yang, Flow and heat transfer characteristics of natural convection in vertical air channels of double-skin solar facades, Appl. Energy 242 (2019) 107-120.  https://doi.org/10.1016/j.apenergy.2019.03.072
  13. Q. Lu, S.Z. Qiu, G.H. Su, et al., Experimental research on heat transfer of natural convection in vertical rectangular channels with large aspect ratio, Exp. Therm. Fluid Sci. 34 (1) (2010) 73-80.  https://doi.org/10.1016/j.expthermflusci.2009.09.004
  14. D.G. Roychowdhury, S.K. Das, T. Sundararajan, Numerical simulation of natural convective heat transfer and fluid flow around a heated cylinder inside an enclosure, Heat Mass Tran. 38 (7-8) (2002) 565-576.  https://doi.org/10.1007/s002310100210
  15. E.H. Bishop, L.R. Mack, J.A. Scanlan, Heat transfer by natural convection between concentric spheres, Int. J. Heat Mass Tran. 9 (7) (1966) 649-662.  https://doi.org/10.1016/0017-9310(66)90041-X
  16. S.H. Yin, R.E. Powe, J.A. Scanlan, et al., Natural convection flow patterns in spherical annuli, Int. J. Heat Mass Tran. 16 (9) (1973) 1785-1795.  https://doi.org/10.1016/0017-9310(73)90168-3
  17. J.A. Scanlan, E.H. Bishop, R.E. Powe, Natural convection heat transfer between concentric spheres, Int. J. Heat Mass Tran. 13 (12) (1970) 1857-1872.  https://doi.org/10.1016/0017-9310(70)90089-X
  18. L.R. Mark, H.C. Hardee, Natural convection between concentric spheres at low Rayleigh numbers, Int. J. Heat Mass Tran. 11 (3) (1968) 387-396.  https://doi.org/10.1016/0017-9310(68)90083-5
  19. V.K. Garg, Natural convection between concentric spheres, Int. J. Heat Mass Tran. 35 (8) (1992) 1935-1945.  https://doi.org/10.1016/0017-9310(92)90196-Y
  20. N. Scurtu, B. Futterer, C.H. Egbers, Three-dimensional natural convection in spherical annuli, J. Phys. Conf. 137 (2008), 012017. 
  21. A.D. Gallegos, C. Malaga, Natural Convection in Eccentric Spherical Annuli, European Journal of Mechanics - B/Fluids, S0997754616302217, 2017. 
  22. A. Bairi, J.M. Garcia de Maria, N. Alilat, et al., Nu-Ra correlations for natural convection at high Ra numbers in air-filled tilted hemispherical cavities with dome oriented upwards. Disk submitted to constatn heat flux, Int. J. Numer. Methods Heat Fluid Flow 25 (3) (2015) 504-512.  https://doi.org/10.1108/HFF-12-2013-0335
  23. D.R. Dudek, T.H. Fletcher, J.P. Longwell, et al., Natural convection induced drag forces on spheres at low Grashof numbers: compraison of theory with experiment, Int. J. Heat Mass Tran. 31 (4) (1988) 863-873.  https://doi.org/10.1016/0017-9310(88)90143-3
  24. A.A. Kranse, J. Schenk, Thermal free convection from a solid sphere, Appl. Sci. Res. Sec. A 15 (1) (1966) 397-403.  https://doi.org/10.1007/BF00411573
  25. A. Laouadi, M.R. Atif, Natural convection heat transfer within multi-layer domes, Int. J. Heat Mass Tran. 44 (10) (2001) 1973-1981.  https://doi.org/10.1016/S0017-9310(00)00195-2
  26. K. Kitamura, A. Mitsuishi, T. Suzuki, et al., Fluid flow and heat transfer of high-Rayleigh-number natural convection around heated spheres, Int. J. Heat Mass Tran. 86 (2015) 149-157.  https://doi.org/10.1016/j.ijheatmasstransfer.2015.02.081
  27. A. Guha, A. Jain, K. Pradhan, Computation and physical explanation of the thermo-fluid-dynamics of natural convection around heated inclined plates with inclination varying from horizontal to vertical, Int. J. Heat Mass Tran. 135 (2019) 1130-1151.  https://doi.org/10.1016/j.ijheatmasstransfer.2019.01.054
  28. C. Dong, G. Lu, R. Chen, et al., Heat transfer of air turbulent mixed convection in the passive containment air-cooling system of a modular small nuclear reactor, Int. J. Therm. Sci. 182 (2022), 107793. 
  29. C. Dong, G. Lu, R. Chen, et al., Experimental study on turbulent natural convection of air between the open-ended parallel plates with one-side heating, Ann. Nucl. Energy 181 (2023), 109510.