JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Heat/Mass Transfer Characteristics in A Rotating Duct with Turn
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Heat/Mass Transfer Characteristics in A Rotating Duct with Turn
Won, Chung-Ho; Lee, Sei-Young; Cho, Hyung-Hee;
  PDF(new window)
 Abstract
The present study investigates convective heat/mass transfer and flow characteristics inside a rotating two-pass rectangular duct. A naphthalene sublimation technique is employed to determine the detailed local heat transfer coefficients using the heat and mass transfer analogy. The objective of this study is to determine the effects of turning geometry with rotation for 0.0Ro0.24. The results reveal that the sharp-turn corner has the larger pressure drop and lower heat transfer in the post-turn region than those of the round-turn corner. The strong secondary flow enhances heat transfer for the round-turn corner. Coriolis force induced by the rotation pushes the high momentum core flow toward the trailing wall in the first passage with radially outward flow and toward the leading wall in the second passage with radially inward flow. Consequently, the high heat transfer rates are generated on the trailing surface and the leading surface in the first and second passage, respectively. However, the strong secondary flow due to the turning dominates the flow pattern in the second passage, thus the heat transfer differences between the leading and trailing surfaces are small with the rotation.
 Keywords
Turbine Internal Passage;Rotating Duct;Duct Flow;Heat/Mass Transfer;
 Language
Korean
 Cited by
1.
회전하는 터빈 블레이드 내부 이차냉각유로에서 엇갈린요철과 평행요철이 열/물질전달에 미치는 영향,이세영;이동호;조형희;

대한기계학회논문집B, 2002. vol.26. 9, pp.1249-1259 crossref(new window)
2.
이차 냉각 유로를 가진 회전덕트에서 열/물질전달 특성 (I) - 요철 설치에 따른 영향 -,김경민;김상인;김윤영;이동호;조형희;

대한기계학회논문집B, 2004. vol.28. 8, pp.910-920 crossref(new window)
3.
곡관부를 가지는 내부 냉각유로에서 회전수 변화에 따른 열전달 및 유동 특성 ( I ) - 엇갈린 요철배열 덕트 -,김경민;김윤영;이동호;조형희;

대한기계학회논문집B, 2005. vol.29. 6, pp.737-746 crossref(new window)
 References
1.
Wagner, J. H., Johnson, B. V. and Hajek, T. J., 1991, 'Heat Transfer in Rotating Passages with Smooth Walls and Radial Outward Flow,' ASME J. Turbomachinery, Vol. 113, pp. 42-51

2.
Wagner, J. H., Johnson, B. V. and Koppe, F. C., 1991, 'Heat Transfer in Rotating Serpentine Passages with Smooth Walls,' ASME J. Turbomachinery, Vol. 113, pp. 321-330

3.
Han, J. C. and Zhang, Y. M., 1992, 'Effect of Uneven Wall Temperature on Local Heat Transfer in a Rotating Square Channel with Smooth Walls and Radial Outward Flow,' ASME J. Heat Transfer, Vol. 114, pp. 850-858

4.
Han, J. C., Zhang, Y. M. and Kalkuehler, K., 1993, 'Uneven Wall Temperature Effect on Local Heat Transfer in a Rotating Two-Pass Square Channel with Smooth Walls,' ASME J. Heat Transfer, Vol. 115, pp. 912-920

5.
Chen, H. C., Jang, Y. J. and Han, J. C., 2000, 'Computation of Heat Transfer in Rotating Two-Pass Square Channels by a Second-Moment Closure Model,' Int. J Heat and Mass Transfer, Vol. 43, pp. 1603-1616 crossref(new window)

6.
Park, C. W. and Lau, S. C., 1998, 'Effect of Channel Orientation of Local Heat (Mass) Transfer Distributions in a Rotating Two-Pass Square Channel with Smooth Walls,' ASME J. Heat Transfer, Vol. 120, pp. 624-632

7.
Kuo, C. R. and Hwang, G. J., 1996, 'Experimental Studies and Correlations of Radially Outward and Inward Air-Flow Heat Transfer in a Rotating Square Duct,' ASME J. Heat Transfer, Vol. 118, pp. 23-30

8.
Goldstein, R. J. and Cho, H. H., 1995, 'A Review of Mass Transfer Measurement Using Naphthalene Sublimation,' Experimental Thermal and Fluid Science, Vol. 10, pp. 416-434 crossref(new window)

9.
Kline, S. J. and McClintock, F. A., 1953, 'Describing Uncertainty in Single-Sample Experiments,' Mechanical Engineering, Vol. 75, pp. 3-8

10.
McAdams, W. H., 1942, Heat Transmission, 2nd ed. McGraw-Hill, New York