Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지

An Experimental Study on Swirling Flow with Heat Transfer in the Horizontal Circular Annuli

  • Chang Tae-Hyun (Division of Mechanical and Automation Engineering, Kyungnam University)
  • Published : 2005.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

An experimental investigation was performed to study the characteristics of turbulent swirling flow in the cylindrical annuli. The swirl angle measurements were performed by flow visualization technique using smoke and dye liquid. By using the particle image velocimetry method. this study has found the time-mean velocity distribution and turbulent intensity with swirl for Re=20,000. 30.000. 50.000. and 70,000 along longitudinal sections. The results appear to be physically reasonable. Other experimental study was performed to investigate heat transfer characteristics of turbulent swirling air flow in axisymmetric annuli. The static pressure. the local air flow temperature, and the wall temperature with decaying swirl were measured by using thermocouples and the friction factor and the local Nusselt number were calculated for Re=30,000. 50,000 and 70000. The local Nusselt number was compared with that obtained from the Dittus-Boelter equation with swirl and without swirl, respectively. The results showed that the swirl enhances the heat transfer at the inlet and the outlet of the test tube.

Keywords

References

  1. Rothfus, R. R., 'Velocity Distribution and Fluid Friction in Concentric Annuli', Ph.D. thesis, Carnegie Institute of Technology, 1948
  2. Brighton, J. A. and Jones, J. B., 1964, 'Fully Developed Turbulent Flow in Annuli', J. of Basic Engineering, pp. 835-843
  3. Alan, Q, 'An Experimental Study of Turbulent Flow Through Concentric Annuli'. Int. J. Mech. Si, Vol. 9, pp. 205-221, 1967 https://doi.org/10.1016/0020-7403(67)90030-6
  4. Tuft, D. B. and Brandt, H., 'Forced Convection Heat Transfer in a Spherical Annulus Heat Exchange', J. of Heat Transfer. Vol. 104. pp. 670-677. 1990 https://doi.org/10.1115/1.3245184
  5. Molki, M., Astill, K. N. and Leal, E., 'Convective Heat-mass Transfer in Temperature Region of a Concentric Annulus having a Rotating inner Cylinder', Int. J. Heat and Fluid Flow, Vol. 11. No. 2. 1990
  6. Garimella, S. and Chritensen, R. N., 'Heat Transfer and Pressure Drop Characteristics of Spirally Flute Annulli: Part II Heat Transfer', J. of Heat, Vol. 117, pp. 55-68, 1995
  7. Chigier, A. N. and Beer, J. M., 'Velocity and Static Pressure Distributions in Swirling Air Jets Issuing From Annular and Divergent Nozzle', ASME, J. of Basic Engineering, pp. 788-796. 1964
  8. Scott. C. J. and Raske, D. R., 'Turbulent Viscosities for Swirling Flow in a Stationary Annulus', ASME J. of Fluid Engineering, pp. 557-566, 1973
  9. Milar, D. A,, 'A Calculation of Laminar and Turbulent Swirling Flows in Cylindrical Annuli', ASME, Winter Annual Meeting New York Dec. pp. 89-98, 1979
  10. Clayton, B, R.,a nd Morsi, Y. S. M., 'Determination of Principal characteristics of Turbulent Swirling Flow Along Annuli'. Int. J. Heat & Fluid Vol.6, No.1, pp. 31-41, 1985 https://doi.org/10.1016/0142-727X(85)90029-3
  11. Chang. T. H. and Kim, H. Y., 'An Investigation of Swirling Flow in a Cylindrical Tube', KSME Int. J., Vol. 15. No.12, pp. 1892-1899. 2001
  12. Kimura I., Takamori T. and Inoue T., 'Image Processing Instrumentation of Flow', Flow Visualization, Vol. 6, No. 22, pp. 105-108, 1986
  13. Kobayashi, T., Saga, T . , and Doh, D., N., 'A Three-Dimensional Simultaneous Scalar and Vectore Tracking Method', Proc. Int. Workshop on PIV. Fukui. Japan, pp. 33-43. 1995
  14. Sparrow, E. M. and Chaboki, A,, 'Swirl-Affected Turbulent Fluid Flow and Heat in a Circular Tube', J. of Heat Transfer ASME. Vol. 106. pp. 766-773, 1984 https://doi.org/10.1115/1.3246750
  15. Medwell, J. O., Chang, T. H. and Kwon, S. S . , 'A Study of Swirling Flow in a Cylindrical Tube'. Korean J. of Air-Conditioning and Refrigeration Engineering, Vol. 1 pp. 265-274, 1989