Affiliation:
1. GE Corporate Research and Development Center, 1 Research Circle, Niskayuna, NY 12309
2. Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180-3590
Abstract
A parametric study has been performed on turbulent flow and heat transfer in internally finned tubes. For a rectangular fin profile, the effects of fin number N, fin width s, fin height H, and helix angle γ were numerically investigated for the conditions of N=10∼40,H=0.03∼0.1,s=0.05∼0.22,γ=10 deg∼40 deg, and Re=40,000. In addition, the performance of three fin profiles—rectangle, triangle, and round crest—with the same fin heights, width, and helix angles were compared for Reynolds numbers between 10,000 and 70,000. Rectangular and triangular fins behave similarly; for some geometric conditions the round crest fin has lower friction factors and Nusselt numbers (17 and 10 percent, respectively) than the rectangular fin. However, when the number of fins is large, the round crest fin can have larger friction factors (about 16 percent). Damping of turbulence energy in the interfin region is credited for the reversal of the typical trends.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference20 articles.
1. Shome, B., and Jensen, M. K., 1996, “Experimental Investigation of Variable Property/Mixed Convection Laminar Flow in Internally-Finned Tubes,” Journal of Enhanced Heat Transfer, 4, pp. 53–70.
2. Shome, B., and Jensen, M. K., 1996, “Numerical Investigation of Variable Property/Mixed Convection Laminar Flow in Internally-Finned Tubes,” Journal of Enhanced Heat Transfer, 4, pp. 35–51.
3. Bergles, A. E., Jensen, M. K., and Shome, B., 1995, “Bibliography on Enhancement of Convective Heat and Mass Transfer,” Heat Transfer Lab. Report-23, Rensselaer Polytechnic Institute, Troy, New York.
4. Liu, X., 1998, “Investigation of Turbulent Flow and Heat Transfer in Internally Finned Tubes,” Ph.D. thesis, Rensselaer Polytechnic Institute, Troy, New York.
5. Carnavos, T. C.
, 1979, “Cooling Air in Turbulent Flow with Internally Finned Tubes,” Heat Transfer Eng., 1, No. 2, pp. 41–46.
Cited by
52 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献