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Reducing disk flutter by improving aerodynamic design of base castings

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3 Author(s)
Baekho Heo ; Dept. of Mech. Eng., Washington Univ., Seattle, WA, USA ; Shen, I.Y. ; Riley, J.J.

The purpose of this paper is to present two aerodynamically designed base castings that could substantially reduce disk flutter due to turbulent excitations in high-speed disk drives. The first design includes aerodynamic brackets to smooth the shroud contour and an extended shroud to reduce the shroud opening. The second design is a Velcro treatment to modify turbulence generation. Experimental results show that smoothing the shroud corners and reducing the shroud opening can reduce disk flutter by as much as 50%. Introducing a Velcro layer to the inner surface of the shroud can perturb the boundary layer and modify turbulent excitations

Published in:

Magnetics, IEEE Transactions on  (Volume:36 ,  Issue: 5 )

Date of Publication:

Sep 2000

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