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Flow instability and elastic vibration of shrouded corotating disk systems

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Abstract.

The interaction between flow instability and elastic vibration of shrouded corotating disks is investigated. Simultaneous measurements of velocity fluctuation and disk vibration are performed in a 3.5-in hard disk drive, which was modified to ensure geometrical axisymmetry. The dependence on Reynolds number of velocity fluctuation and disk vibration is examined. Spectral analysis and cross-correlation measurements employing hot-wire anemometry reveal the wave number, the speed of rotation, the coupling of instabilities on both sides of a disk as well as the axial extent of the unstable flow structure. The role of flow instability on disk vibration is emphasized.

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Authors and Affiliations

  1. Toyota Motor Corp., 1 Toyota-cho, Toyota 471-8572, Japan, , , , ,

    R. Fukaya

  2. Dept. of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan, , , , ,

    S. Obi &  S. Masuda

  3. Mechanical Engineering Laboratory, Hitachi Ltd., 502 Kandatsu, Hitachi 300-0013, Japan, , , , ,

    M. Tokuyama

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  1. R. Fukaya
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  2. S. Obi
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  3. S. Masuda
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  4. M. Tokuyama
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Fukaya, .R., Obi, .S., Masuda, .S. et al. Flow instability and elastic vibration of shrouded corotating disk systems. Exp Fluids 33, 369–373 (2002). https://doi.org/10.1007/s00348-002-0418-7

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  • DOI: https://doi.org/10.1007/s00348-002-0418-7

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