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

  • 제24권8호
  • /
  • Pages.1029-1037
  • /
  • 2000
  • /
  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지
DOI QR코드

DOI QR Code

슈라우드로 차폐되어진 단일회전디스크 표면의 열전달 특성

Heat Transfer Characteristics on a Single Rotating Disk with a Shrouded Cover

  • 발행 : 2000.08.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The present study investigates the local heat/mass transfer characteristics on a rotating disk which is the top disk covered with a shroud in HDD. The naphthalene sublimation technique is employed to determine the local heat/mass transfer coefficients on the rotating disk. Flow field measurements using Laser Doppler Anemometry (LDA) and numerical calculations are performed to analyze the flow patterns induced by the disk rotation. HDD has been developed for compactness and speedy data access, thus the rotating velocity of the disk is increased and the height of a hub is decreased. The experiments are conducted for the various hub heights of 5, 10 and 15 mm, for the rotating Reynolds numbers of $5.5{\times}10^4$ to $1.1{\times}10^5$ and for the effects of the presence of a read/write head arm. The results show that the heat transfer on the rotating disk is enhanced considerably for the decrease of the hub height and for the increase of the rotating Reynolds number. The head arm inserted in the cavity decreases the heat transfer despite the enhancement of tangential RMS velocity because of the deficit of the momentum in the flow field.

키워드

참고문헌

  1. 최상민, 김진수, 현재민, 1992, '회전하는 원판사이에서의 유체유동' 대한기계학회논문집, 제16권, 제2호, pp. 281-289
  2. Abrahamson, S. D., Chinang, C., and Eaton, J. K., 1991, 'Flow Structure in Head-disk Assemblies and Implications for Design,' Adv. Info. Storage Syst .. Vol. 1, pp. 111-132
  3. Humphrey, J. A. C., Schuler, C. A., and Iglesias, I., 1992, 'Analysis of Viscous Dissipation in Disk Storage Systems and Similar Flow Configurations,' Physics of Fluids, Vol. 4, pp. 1415-1427 https://doi.org/10.1063/1.858417
  4. Chyu, M. K., and Bizzak, D. J., 1992, 'Surface Heat Transfer in a Hubbed Rotor-Stator and a Clamped Corotating Disk Assembly with and without Axial Source Flow,' Adv. Info. Storage Syst., Vol. 4, pp. 393-404
  5. 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,' ASME J Heat Transfer, Vol. 114, pp. 1051-1054
  6. Goldstein, R. J. and Cho, H. H. 1995, 'A Review of Mass Transfer Measurements Using Naphthalene Sublimation,' Experimental Thermal and Fluid Science, Vol. 10, pp. 416-434 https://doi.org/10.1016/0894-1777(94)00071-F
  7. Owen, J. M. and Rogers, R. H., 1989, Flow and Heat Transfer in Rotating-Disc Systems Rotor-Stator Systems, JOHN WILEY & SONS INC., pp. 93-124
  8. DANTEC, 1996, Fiber Flow : Installation and User Guide
  9. 원정호, 류구영, 조형희, 1999, '구속된 단일회전원판과 동시회전원판 내부의 유동특성,' 대한기계학회논문집(B), 제23권, 제9호, pp. 1192-1200
  10. Frank M. White, 1991, Viscous Fluid Flow, McGraw-Hill Inc, pp. 152-168
  11. Kline, S. J., and McClintock, F. A., 1953, 'Describing Uncertainty in Single-Sample Experiments,' Mechanical Engineering, Vol. 75, pp. 38