Abstract

The present study investigates flow characteristics in an optical disc drive (ODD). Detailed knowledge of the flow characteristics is essential to analyze flow-induced noise and vibration, forced convection and flow friction loss. The ODD used in a personal computer is used for the experiment and rotating velocity of disc is under the 4500 rpm. Time-resolved velocity component and velocity spectrum are obtained using the laser Doppler anemometry (LDA), and the flow patterns induced by rotating disc in the ODD are calculated by a commercial finite volume method at the same time. The results show that the front holes reduce flow-induced noise and the position of pickup body only affects flow near the window. Furthermore, it is possible for cooling of heat sources in the drive through measuring the flow fields under the tray. In addition, the numerical results are well matched up to the experimental results, therefore, the validation of the numerical results can be achieved. From the validation of numerical results, it is possible to predict the flow characteristics of the region where it is unable to conduct the experiment.

주제어

#광 디스크 드라이브   #레이저 도플러 속도계   #유동   #유동소음   #열원  

저자의 다른 논문

참고문헌 (12)

1. Schlichting, H. and Gersten, K., 2000, 'Boundary Layer Theory,' Springer 
2. Macey, J. P. and Wellman, E. J., 1969, 'Instability Phenomenon Associated with an Enclosed Rotating Disk,' Phys. Fluids, Vol. 12, pp.710-722 
3. Erian, F. F. and Tong, Y. H., 1971, 'Turbulent Flow Due to a Rotating Disk,' Phys. Fluids, Vol. 14, pp. 2588-2591 
4. Kobayashi, R., 1994, 'Review : Laminar to Turbulent Transition of Three-Dimensional Boundary Layers on Rotating Bodies,' Journal of Fluids Engineering, Vol. 116, pp. 200-211 
5. Sirivat, A., 1991, 'Stability Experiment of Flow Between a Stationary and a Rotating Disk,' Phys. Fluids, Vol. 3, pp. 2664-2671 
6. Lopez, L. M., 1996, 'Flow Between a Stationary and a Rotating Disk Shrouded by a Co-rotating Cylinder,' Phys. Fluids, Vol. 8, pp. 2605-2613 
7. Tzeng, H. M. and Munce, Jr. A. C., 1992, 'Flow Between Shrouded Co-Rotating Disk with Radial and Oblique Obstructions,' Adv. Info. Storage Syst., Vol. 4, pp. 383-391 
8. Abrahamson, S. D., Eaton J. K. and Koga D. J., 1989, 'The Flow Between Shrouded Co-Rotating Disks,' Phys. Fluids, Vol. 1, pp. 241-251 
9. Dantec, 1995, 'Fiber Flow : Installation and User Guide' 
10. Adrian, R. J. and Yao, C. S., 1987, 'Power Spectra of Fluid Velocities Measured by Laser Doppler Velocimetry,' Exp. in fluids, Vol. 5, pp. 17-28 
11. Host-Madsen, A., 1994, 'A New Method for Estimation of Turbulence Spectra for Laser Doppler Anemometry,' 7th Int. Symposium on Applications of Laser Techniques to Fluid Mechanics 
12. Park, Gunsoon, Song, Insang, Kim, Sookyung, Kim, Waeyul and Lee, Seungyop, 2000, 'Airflow and Sound Induced by Disk Rotation in DVD Drives,' Info. Storage Proc. Syst., Vol. 2, pp. 3-11 

이 논문을 인용한 문헌 (0)

1. 이 논문을 인용한 문헌 없음