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
- 학술저널
- 저자정보
- 발행연도
- 2012.12
- 수록면
- 30 - 37 (8page)
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초록· 키워드
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Effect of rib heights is found as significant parameter to enhance convective heat transfer performance under laminar and low turbulent regime. Circular ribs with different ribheight to channel height ratios, e/H = 0.05, 0.1, 0.15, are fabricated over the copper substraterespectively in a rectangular duct having 7.5 cross sectional aspect ratio. Only one rib pitch to rib height ratio (P/e = 10) has been chosen for all different height ribs. The result shows that the arithmetic average of turbulence intensity decreases with decreasing roughness height calculated between two ribs under laminar and low turbulent region. It occurs because the area of recirculation and reattachment zone also decreases with decreasing rib height. Optimum thermal enhancement factor is derived by 0.1 rib height to channel height ratio under low turbulent region but 0.15 rib height to channel height ratio gives maximum subjected to laminar flow.
목차
Abstract
1. Introduction
2. Experimental Setup
3. Data Reduction
4. Result and Discussion
5. Conclusion
Acknowledgements
References
참고문헌 (12)
참고문헌 신청
1. [학술지(정기간행물)] - RAntonia, R / 1971 / The response of a turbulent boundary to an upstanding step change in surface roughness / ASME J. Basic Eng 93 : 22 ~ 34
2. [단행본] - Schlichting, H / 1979 / Boundary-Layer Theory, seventh ed / McGraw Hill : 598 ~ 634
3. [학술지(정기간행물)] - Islam, O / 1976 / Channel flow over smooth-to-rough surface discontinuity with zero pressure gradient / J. Fluids Eng 99 : 626 ~ 634
4. [학술지(정기간행물)] - Siuru, W.D / 1977 / Response of a turbulent pipe flow to a change in roughness / J. Fluids Eng 99 : 548 ~ 555
5. [학술지(정기간행물)] - R.L. Webb / 1971 / Heat Transfer and Friction in Tubeswith Repeated-Rib Roughness / Int. J. HeatMass Transf 14 (4) : 601 ~ 617
2. [단행본] - Schlichting, H / 1979 / Boundary-Layer Theory, seventh ed / McGraw Hill : 598 ~ 634
3. [학술지(정기간행물)] - Islam, O / 1976 / Channel flow over smooth-to-rough surface discontinuity with zero pressure gradient / J. Fluids Eng 99 : 626 ~ 634
4. [학술지(정기간행물)] - Siuru, W.D / 1977 / Response of a turbulent pipe flow to a change in roughness / J. Fluids Eng 99 : 548 ~ 555
5. [학술지(정기간행물)] - R.L. Webb / 1971 / Heat Transfer and Friction in Tubeswith Repeated-Rib Roughness / Int. J. HeatMass Transf 14 (4) : 601 ~ 617
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UCI(KEPA) : I410-ECN-0101-2014-550-000524438