Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Effects of Gap Spacing on Heat Transfer Characteristics for Co-Rotating Disks

동시 회전원판 사이의 간격변화에 따른 열전달 특성

  • Published : 2000.04.01
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Abstract

Local heat transfer characteristics inside a hard disk driver(HDD) are investigated in this study. The investigation is considered between disks co-rotating in a cylindrical enclosure. The gap spacing, rotating speed and head-arm positions are mainly considered to understand the flow and heat transfer in the co-rotating disks. The naphthalene sublimation technique is used to determine local heat/mass transfer coefficients on the rotating disk. Flow patterns inside the co-rotating disks are investigated using a Laser Doppler Anemometer (LDA) and also analyzed numerically. The results show that the heat transfer coefficients on the disk changed little with the gap spacing between disks. Heat transfer rates in the outer region increases with increasing rotating Renolds number, but the values normalized by that on a free rotating disk give a similar pattern for the tested cases. The head-arm inserted between the rotating disks destroys the inner region resulting in enhancement of heat transfer in that region.

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References

  1. Abrahamson, S. D., Chiang, C., and Eaton, J. K., 1990, 'Flow Structure in Head-disk Assemblies and Implications for Design,' ASME Adv. lnfo. Storage Syst., Vol. 1, pp. 111-132
  2. Szeri, A. Z., Schneider, S. J., Labbe, and F., Kaufman, H. N., 1983, 'Flow Between Rotating Disks(Part I. Basic Flow,' ASME J Fluid Mechanics, Vol. 134, pp. 103 -132 https://doi.org/10.1017/S0022112083003250
  3. Bakke, E., Kreider, J. F., and Kreith, F., 1973, 'Turbulent Source Flow Between Parallel Stationary and Co-rotating disks,' ASME J Fluid Mechanics, Vol. 58, pp. 625 -632 https://doi.org/10.1017/S0022112073002569
  4. Humphrey, J. A. C., Chang, C. J., Li, H., and Schuler, C. A., 1990, 'Unobstructed and Obstructed Rotating Disk Flows: Summary Review Relevant to Information Storage Systems,' ASME Adv. Info. Stroste Syst., Vol.1, pp. 79-110
  5. Tzeng, H. H., and Munce Jr., A. C., 1992, ' Flows between Shrouded Co-rotating Disks with Radial and Oblique Obstructions,' ASME Adv. Info Storage Syst., Vol. 4, pp. 383-392
  6. Chang, C. J., Schuler, C. A., Humphrey, J. A. C., and Greif, R., 1989, 'Flow and Heat Transfer in the Space between Two Co-rotating Disks in an Axisymmetric Enclosure,' ASME J Heat Transfer, Vol. 111, pp. 625 -632
  7. Chang, C. J., Humphrey, J. A. C., and Greif, R., 1990, 'Calculation of Turbulent Convection between Co-rotating Disks in Axisymmetric Enclosures,' Int. J Heat and Mass Transfer, Vol. 33, pp. 2701-2720 https://doi.org/10.1016/0017-9310(90)90205-9
  8. Schuler, C. A., Usry, W., Weber, B. Humphrey, J. A. C., and Greif, R., 1990, 'On the Flow in the Unobstructed Space between Shrouded Co-rotating Disks,' Physics of Fluids A, Vol. 2, pp. 1760-1770 https://doi.org/10.1063/1.857703
  9. Humphrey, J. A. C., Schuler, C. A., and Iglesias, I., 1992, 'Analyis of Viscous Dissipation in Disk Storage Systems and Related Flow Configurations,' Physics of Fluids A., Vol. 4, pp. 1415-1427 https://doi.org/10.1063/1.858417
  10. Humphrey, J. A. C., Schuler, C. A., and Weber, D. R., 1995, 'Unsteady Lamnar Flow Between a Pair of Disks Co-rotating in a Fixed Cylindrical Enclosure,' Physics of Fluids, vol. 7, pp. 1225 -1240 https://doi.org/10.1063/1.868753
  11. Suzuki, H., and Humphrey, J. A. C., 1997, 'Flow Past Large Obstructions Between Co-rotating Disks in Fixed Cylindrical Enclosures,' J Fluids Engineering, Vol. 119, pp. 499-505
  12. Chyu, M. K., and Bizzak, D. J., 1992. 'Surface Heat Transfer in a Hubbed Rotor-Stator and a Clamped Co-rotating Disks Assembly with and without Axial Source Flow' ASME Adv. Info. Storage Syst. Vol. 4, pp. 393-404
  13. Chyu, M. K., and Bizzak, D. J., 1992. 'Effects of Axial and Radial-Gap Spacing in the Local Heat Transfer of a Shrouded Rotor-Stator System' J. Heat Transfer, Vol. 114, pp. 1051-1054
  14. Mills, A.F., 1995, Basic Heat and Mass Transfer,' RICHARD D. IRWIN, INC., pp. 296-300
  15. 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 https://doi.org/10.1016/0894-1777(94)00071-F
  16. 원정호, 류구영, 조형희, 1999, '구속된 단일회전원판과 동시 회전원판 내부의 유동특성,' 대한기계학회 논문집 B. 제23권 제9호. pp 1192-1200