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자료유형
학술저널
저자정보
저널정보
대한기계학회 Journal of Mechanical Science and Technology KSME International Journal Vol.17 No.6
발행연도
2003.6
수록면
879 - 887 (9page)

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초록· 키워드

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The flow in a parallel walled test channel. when obstructed with a geometry at the entrance. can be forward. reverse and stagnant depending on the position of the obstruction. This interesting flow phenomenon has potential benefit in the control of energy and various flows in the process industry. In this experiment. the flat plate obstruction geometry was used as an obstruction at the entry of the test channel. The parameters that innuence the now inside and around the test channel were the gap (g) between the test channel and thc obstruction geometry. the Icngth (L) of the test channet and the Reynolds number (Re). The elrect of the gap to channel width ratio (g/w) on the magnitude of the velocity ratio (V₁/V_0: velocity inside/ velocity outside the test channel) was investigated for a range of Reynolds numbers. The maximum reverse now observed was nearly 20% to 60% of the outside velocity for Reynolds number ranging from 1000 to 9000 at g/w ratio of 1.5. The maximum forward velocity inside the test channel was found 80% of the outside velocity at higher g/w ratio of 8. The effect of the test channel length on the velocity ratio was investigated for different g/w ratios and a fixed Reynolds number of 4000. The innucnce of the Reynolds number on the velocity ratio is also discussed and presented for different gap to width ratio (g/w). The now visualisation photo-graphs showing fluid motion inside and around the test channel are also presented and discussed.

목차

1.Introduction

2.Materials and Equipment

3.Experimental Procedure

4.Results and Discussions

5.Conclusion

Acknowledgment

References

Abstract

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