입자 추적 방법을 이용한 원자력발전소용 증기발생기 스월베인 습분분리기 해석

다국어 초록 (Multilingual Abstract)

The steam generator in a nuclear power plant should provide high quality steam to the turbine for better efficiency and stability. For this purpose, a steam separator is installed in the steam generator to manage the quality of the steam. In this study, computational fluid dynamics (CFD) technique was carried out to analyze the flow phenomenon of the swirl-vane type steam separator. When the steam enters the swirl-vane separator with droplets, it is affected by the centrifugal force. Some of the droplets are attached to the riser wall, some pass through the outlet (bypass and the downstream pipe) and the remaining droplets enter the next separator. A Lagrangian particle model was used to simulate the behaviors of steam and water droplets. The results show that the removal of the droplets depend on the size of the droplets. When the droplet size is small, it is removed by the outlet. In particular for the droplet size of 0.01 micron, over 75% of them are removed. When the droplet size is large, it is collected on the wall. In particular for the droplet size of 50 micron, over 95% of them are collected on the wall. Thus, the performance of the separator decreases as the droplet enters the next separator directly before being collected on the walls or on the outlet if the length of the riser above the swirl-vane is short.

참고문헌 (Reference)

1 "http://www.nucleartourist.com/images/sg-c.jpg"

2 Zihao Tian, "Numerical Investigation on a New Type of Two-Stage Steam Separator in Pressurized Water Reactors" Elsevier BV 142 : 3962-3967, 2017

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4 Zhenqin Xiong, "Effects of the slots on the performance of swirl-vane separator" Elsevier BV 265 : 13-18, 2013

5 Toshiki Matsubayashi, "Effects of swirler shape on swirling annular flow in a gas–liquid separator" Elsevier BV 249 : 63-70, 2012

6 Hironobu KATAOKA, "Effects of Swirler Shape on Two-Phase Swirling Flow in a Steam Separator" Japan Society of Mechanical Engineers 3 (3): 347-355, 2009

7 J. H. Jeon, "Analysis of Swirl-vane Separator Using CFD Particle Model" 156-157, 2019

8 "ANSYS CFX- Solver Theory Guide"