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논문 기본 정보

자료유형
학술대회자료
저자정보
Won Tae Kang (창원대학교) Byeong Rog Shin (창원대학교)
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2013년도 학술대회
발행연도
2013.12
수록면
4,024 - 4,029 (6page)

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초록· 키워드

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An experimental investigation on the effective shape of a quadrilateral floor splitter to reduce sub-surface vortices and cavitation is performed. A test model sump was designed based on the Froude number similitude for the recommended structure layout by HI Standard. To obtain an effective shape of the splitter as an anti-vortex device, 3 types of quadrilateral submerged bar with different shape and dimension in sectional area are considered. From the experimental results with and without the splitter, it was confirmed that the installation of the anti-vortex device is very effective to reduce abnormal vortices including sub-surface vortices, pre-swirls and other undesirable hydraulic phenomena. Because of the splitter, sub-surface vortices under the bell mouth did not appear anymore and the swirl was dramatically weakened. The evaluation of the splitter was made by the measurement of swirl angles. Splitters with square sections showed partly large swirl angles exceeding the acceptable criteria of HI standard. Meanwhile, the splitter with trapezoidal section was showed swirl angle values of less than 5 degrees in all cases of pump operation. Among the 3 types of anti-vortex device, the trapezoidal splitter is the most effective one to suppress the vortices. It is very useful to reduce the occurrence of submerged vortices and to obtain stable inflow condition for designing a high performance pump sump.

목차

Abstract
1. 서론
2. Experimental Apparatus and Flow conditions
3. Experimental Results
4. Conclusions
References

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