지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2014.11
- 수록면
- 141 - 146 (6page)
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초록· 키워드
오류제보하기
The present study is to measure of liquid film dynamics with 1/10 modified linear scaled replicating experimental apparatus of direct vessel injection (DVI) using confocal chromatic method. DVI is employed as an emergency core cooling (ECC) system during loss of coolant accident in the nuclear generator APR1400. If ECC water is injected through the DVI nozzles, for high-temperature and high-pressure state of the vessel, we expect complicated multi-phase flow phenomena such as the wavy film flow, film breakup and entrainments. The key parameter of those film flow dynamics such as film breakup is the film Reynolds number correlated with liquid film thickness. A series of experiments were conducted in the 1/10 scaled plate test rig. Width and thickness of the film flow were measured in injection velocity conditions with 0.3m/s, 0.5m/s and 0.7m/s. The confocal chromatic sensing method was used to measure the thickness and the width at 1cm horizontal interval and 5cm vertical interval with 200Hz. It was found that the width of the film becomes larger as the injection velocity is higher and the measured thicknesses of the outer boundary and center of the film flow were larger than those of the other points. All of thickness data is less than 5mm. It can be concluded that the thickness of the film flow is not closely related with injection velocity but related with location. Utilizing the thickness data and the velocity data is expected to get the information about onset of the entrainment region.
목차
Abstract
1. 서론
2. 실험 설계 및 장치 구성
3. 이론적 배경
4. 실험 결과 및 토의
5. 결론
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