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
- 26 - 29 (4page)
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초록· 키워드
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Pre-swirl is a rotational flow around the suction pipe. It is created by the velocity gradient due to imbalance in inlet velocity according to the shape of pump sump channel. Pre-swirl is an important factor for the creation of vortex, but only a few studies about the conditions and effects of creating pre-swirl quantitatively exists. In this study, the flow characteristics are predicted using CFD by applying various velocity gradients on the cross section of the inlet of pump sump channel. The shape and size of the pump sump channel is adopted from the HI standard manual and the velocity gradient is expressed linearly. The result shows that the pre-swirl occurs in all cases of velocity gradient except for uniform velocity; and the pre-swirl increases in accordance with the velocity gradient. Also, the dead zones (recirculation zones) and the free-surface vortex areas near suction pipe are expanded due to pre-swirl.
목차
Abstract
1. 서론
2. 해석모델 및 경계조건
3. 수치해석 결과
4. 결론
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