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Numerical Simulation on the Behavior of Air Bubble Discharging into a Water Pool through a Sparger without Load Reduction Ring  

김환열 (한국원자력 연구소)
배윤영 (한국원자력 연구소)
송진호 (한국원자력 연구소)
김희동 (한국원자력 연구소)
Publication Information
Journal of Energy Engineering / v.12, no.4, 2003 , pp. 259-266 More about this Journal
Abstract
Load reduction ring (LRR) was installed on the ABB-Atom sparger to reduce the oscillatory loadings due to the air bubble clouds in the water pool in case of safety relief system operations. In order to investigate the effect of LRR on the pressure field, a numerical simulation on the behavior of air bubble clouds discharging into a water pool through a ABB-Atom sparser without LRR was performed by using a commercial thermal hydraulic analysis code, FLUENT 4.5. Among the multi-phase models contained in the code, the VOF (Volume Of Fluid) model was used to simulate the interface of water, air and steam flows. By comparing the analysis results with the previous ones, the load reduction ring has an effect on reducing the oscillatory loads at the wall. It also includes the effect of air mass and inlet boundary conditions of the pipe on the pressure oscillations at the wall.
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  • Reference
1 Utamura, M.: 'An Analysis of Multiple Bubble Behaviors in a BWR Suppression Pool', 2nd Int.Topical Meeting on Nuclear Thermal Hydraulics, Santa Barbara, CA, USA, Jan. (1983)
2 Nilsson, L.: 'Experimental Investigation of Steam Vent Clearing Phenomena at System Relief into a Condensation Pool of Water', AE-RL-1630 (1975)
3 Brennen, C.E.: Cavitation and Bubble Dynamics, Oxford Univ. Press (1995)
4 Kim, H.Y. et al.: 'Numerical Simulation on the Behavior of Air Cloud Discharging into a Water Pool', Energy Engg. J., 11(3) (2002)
5 Bae, Y.Y., Kim, H.Y., Chang, M.H. and Park, J.K.: A Study of the Air Discharge and Subsequent Oscillation with Heat Transfer, ASME 2000 Fluids Engineering Division Summer Meeting, FEDSM 2000, Boston, MA, June, 11-15 (2000)
6 Moody, FJ.: Introduction to Unsteady Thermofluid Mechanics, John Wiley & Sons, Inc., (1990)
7 FLUENT user's guide manual, version 4.3, (1995)