Nuclear Engineering and Technology

  • 제52권12호
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  • Pages.2771-2788
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  • 2020
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Experimental study of bubble flow behavior during flow instability under uniform and non-uniform transverse heat distribution

  • Al-Yahia, Omar S. (Emirates Nuclear Technology Center, Khalifa University of Science and Technology) ;
  • Yoon, Ho Joon (Emirates Nuclear Technology Center, Khalifa University of Science and Technology) ;
  • Jo, Daeseong (School of Mechanical Engineering, Kyungpook National University)
  • 투고 : 2019.11.20
  • 심사 : 2020.05.23
  • 발행 : 2020.12.25
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초록

Experiments are conducted to study bubble flow behavior during the instability of subcooled boiling under uniform and non-uniform transverse heating. The non-uniform heat distribution introduces nonuniform bubble generation and condensation rates on the heated surface, which is different from the uniform heating. These bubble generation and condensation characteristics introduce a non-uniform local pressure distribution in the transverse direction, which creates an extra non-uniform pressure on the flowing bubbles. Therefore, different bubble flow behavior can be observed between uniform and non-uniform heating conditions. In the uniform heating, bubble velocity fluctuations are low, and the bubbles travel straight along the axial direction. In the non-uniform heating, more fluctuation in the bubble velocity occurs at low mass flow rate and high subcooled inlet temperatures, and reverse flow is observed. Additionally, the bubbles show a zigzag trajectory when they pass through the channel, which indicates the existence of cross flow in the transverse direction.

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과제정보

This work was supported by the National Research Foundation of Korea (NRF) grant, which was funded by the Korean government (NRF- 2019M2D2A1A02058115).

참고문헌

  1. O.S. Al-Yahia, D. Jo, ONB, OSV, and OFI for subcooled flow boiling through a narrow rectangular channel heated on one-side, Int. J. Heat Mass Tran. 116 (2018) 136-151.
  2. D. Yuan, D. Chen, X. Yan, J. Xu, Q. Lu, Y. Huang, Bubble behavior and its contribution to heat transfer of subcooled flow boiling in a vertical rectangular channel, Ann. Nucl. Energy 119 (2018) 191-202.
  3. O.S. Al-Yahia, D. Jo, Onset of Nucleate Boiling for subcooled flow through a one-side heated narrow rectangular channel, Ann. Nucl. Energy 109 (2017) 30-40.
  4. T. Kim, O.S. Al-Yahia, D. Jo, Experimental study on the Onset of Nucleate Boiling in a narrow rectangular channel under transversely non-uniform and uniform heating, Exp. Therm. Fluid Sci. 99 (2018) 158-168.
  5. T. Kim, Y.J. Song, O.S. Al-Yahia, D. Jo, Prediction of the minimum point of the pressure drop in a narrow rectangular channel under a transversely nonuniform heat flux, Ann. Nucl. Energy 122 (2018) 163-174.
  6. O.S. Al-Yahia, Y.J. Lee, D. Jo, Effect of transverse power distribution on the ONB location in the subcooled boiling flow, Ann. Nucl. Energy 100 (2017) 98-106.
  7. S. Piedra, E. Ramos, Dynamics of two-dimensional bubbles, Phys. Rev. 91 (2015), 063013.
  8. A.H. Abdelmessih, F.C. Hooper, S.J. Nangia, Flow effects on bubble growth and collapse in surface boiling, Int. J. Heat Mass Tran. 15 (1972) 115-125.
  9. J. Grienberger, Untersuchung und modellierung von Blasensaulen, PhD Diss, Uitgever niet vastgesteld, 1992.
  10. T. Maxworthy, Bubble formation, motion and interaction in a Hele-Shaw cell, J. Fluid Mech. POZ. 173 (1986) 9-5114.
  11. E. Kelley, M. Wu, Path instabilities of rising air bubbles in a hele-shaw cell, Phys. Rev. Lett. 79 (1997) 7.
  12. W.L. Haberman, R.K. Morton, David Taylor Model Basin Report No. 802, 1953.
  13. D. Qui, V.K. Dhir, Experimental study of flow pattern and heat transfer associated with a bubble sliding on downward facing inclined surfaces, Exp. Therm. Fluid Sci. 26 (2002) 605-616.
  14. G.E. Thorncroft, J.F. Klausner, R.J. Mei, An experimental investigation of bubble growth and detachment in vertical upflow and downflow boiling, Int. J. Heat Mass Tran. 41 (1998) 3857-3871.
  15. D.K. Hollingsworth, L.C. Witte, M. Figueroa, Enhancement of heat transfer behind a sliding bubble, ASME J. Heat Transfer 131 (12) (2009), 121005-1-121005-9.
  16. A.B. Ozer, A.F. Oncel, D.K. Hollingsworth, L.C. Witte, The effect of sliding bubbles on nucleate boiling of a subcooled liquid flowing in a narrow channel, Int. J. Heat Mass Tran. 54 (2011) 1930-1940.
  17. T. Okawa, T. Ishida, I. Kataoka, M. Mori, On the rise paths of single vapor bubbles after the departure from nucleation sites in subcooling upflow boiling, Int. J. Heat Mass Tran. 48 (11) (2005) 4446-4459.
  18. D. Yuan, L. Pan, D. Chen, H. Zhang, J. Wei, Y. Huang, Bubble behavior of high subcooling flow boiling at different system pressure in vertical narrow channel, Appl. Therm. Eng. 31 (2011) 3512-3520.
  19. F. Gao, P. Gao, C. Xu, Bubble behaviors under subcooled flow boiling instability in narrow channel. 7th international symposium on multiphase flow, heat mass transfer and energy conversion, AIP Conf. Proc. 1547 (2013) 3-11.
  20. O.S. Al-Yahia, T. Kim, D. Jo, Flow Instability (FI) for subcooled flow boiling through a narrow rectangular channel under transversely uniform and nonuniform heat flux, Int. J. Heat Mass Transfer 125 (2018) 116-128.
  21. O.S. Al-Yahia, H.J. Yoon, D. Jo, Bubble dynamic parameters during subcooled flow boiling under uniform and non-uniform transverse heat distribution, Int. J. Heat Mass Tran. 143 (2019) 118508.
  22. R.J. Moffat, Describing the uncertainties in experimental results, Exp. Therm. Fluid Sci. 1 (1988) 3-17.