| Autor: |
Joseph A. C. Humphrey, C. A. Schuler, Ralph Greif, W. R. Usry, B. Weber |
| Rok vydání: |
1990 |
| Předmět: |
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| Zdroj: |
Physics of Fluids A: Fluid Dynamics. 2:1760-1770 |
| ISSN: |
0899-8213 |
| DOI: |
10.1063/1.857703 |
| Popis: |
A model of a computer hard disk drive was constructed and measurements of the air flow in the unobstructed space between a pair of disks were obtained. The disks were centrally clamped to a common hub, and rotated within an axisymmetric (cylindrical) enclosure or shroud. Measurements of the circumferential velocity component were made at five radial locations and three rotation rates (Ω=300, 1200, and 3600 rpm) using a laser‐Doppler velocimeter. The resulting mean and rms circumferential velocity profiles are presented and discussed. The data show that the circumferential velocity component profiles are fairly uniform in the axial direction in the space between the disks, except near the shroud where the flow is strongly sheared. The circumferential velocity peaks at a critical radius. Between the hub and the critical radius location the flow is in solid body rotation. Between the critical radius and the shroud the circumferential velocity decreases to zero, gradually at first and then very quickly as the... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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