This paper focuses on the interaction between the flow unsteadiness and disk vibration of shrouded corotating disk system to identify the nature of the flow-induced vibration of disks in the wide range of rotation speed below critical. Special attention is paid to the role of the vortical flow structure on the disk vibration and vice versa. The water test rig for optical measurement and the air test rig for hot-wire and vibration measurements are employed, both being axisymmetric models of hard disk drive. Before investigating fluid-solid interaction, the velocity and vorticity fields between disks are examined by employing a particle image velocimetry, in order to check the flow within our own apparatus to have the same characteristics as those commonly accepted. In the course of this preliminary experiment, it is found that “vortical structures” reported in the previous papers based on the flow visualization are actually “vortices” in the sense that it exhibits closed streamlines with concentrated vorticity at its center when seen from an observer rotating with the structure itself. The measurements of out-of-plane displacement of the disk employing different disk materials reveal that disk vibration begins to occur even in low subcritical speed range, and amplitude of nonrepeatable run out (NRRO) can be uniquely correlated by using the ratio between the rotating speed and the critical speed. The power spectral densities of disk vibration showed that the disk vibrates as a free vibration triggered by, but not forced by, the flow unsteadiness even in the high subcritical speed range. The disk vibration has negligible effect on the vortical flow structure suggesting the soundness of the rigid disk assumption employed in the existing CFD. However, RRO has significant influence on the flow unsteadiness even if the disks are carefully manufactured and assembled. Since the RRO is unavoidable in the real disk system, the flat disk assumption should be considered more carefully.
Skip Nav Destination
e-mail: kana@earth.tec.toyota.co.jp
e-mail: jyo-suzuki@mhi.co.jp
e-mail: obsn@mech.keio.ac.jp
e-mail: bzp01264@nifty.ne.jp
Article navigation
October 2007
Technical Papers
Flow Instability and Disk Vibration of Shrouded Corotating Disk System
S. Kanagai,
S. Kanagai
LEXUS Body Engineering Division,
e-mail: kana@earth.tec.toyota.co.jp
Toyota Motor Corporation
, 1 Toyota-cho, Toyota, Aichi 471-8571, Japan
Search for other works by this author on:
J. Suzuki,
J. Suzuki
Machinery and Assembly Shop,
e-mail: jyo-suzuki@mhi.co.jp
Mitsubishi Heavy Industries, Ltd.
, 1-1-1 Wadasaki-cho, Hyogo-ku, Kobe 652-8585, Japan
Search for other works by this author on:
S. Obi,
S. Obi
Department of Mechanical Engineering,
e-mail: obsn@mech.keio.ac.jp
Keio University
, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama 223-8522, Japan
Search for other works by this author on:
S. Masuda
S. Masuda
Department of Mechanical Engineering,
e-mail: bzp01264@nifty.ne.jp
Keio University
, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama 223-8522, Japan
Search for other works by this author on:
S. Kanagai
LEXUS Body Engineering Division,
Toyota Motor Corporation
, 1 Toyota-cho, Toyota, Aichi 471-8571, Japane-mail: kana@earth.tec.toyota.co.jp
J. Suzuki
Machinery and Assembly Shop,
Mitsubishi Heavy Industries, Ltd.
, 1-1-1 Wadasaki-cho, Hyogo-ku, Kobe 652-8585, Japane-mail: jyo-suzuki@mhi.co.jp
S. Obi
Department of Mechanical Engineering,
Keio University
, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama 223-8522, Japane-mail: obsn@mech.keio.ac.jp
S. Masuda
Department of Mechanical Engineering,
Keio University
, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama 223-8522, Japane-mail: bzp01264@nifty.ne.jp
J. Fluids Eng. Oct 2007, 129(10): 1306-1313 (8 pages)
Published Online: April 25, 2007
Article history
Received:
January 28, 2005
Revised:
April 25, 2007
Citation
Kanagai, S., Suzuki, J., Obi, S., and Masuda, S. (April 25, 2007). "Flow Instability and Disk Vibration of Shrouded Corotating Disk System." ASME. J. Fluids Eng. October 2007; 129(10): 1306–1313. https://doi.org/10.1115/1.2776958
Download citation file:
Get Email Alerts
Related Articles
Discussion: “An Experimental and Numerical Invesitgation Into the Mechanism of Rotating Instability” (Maerz, J., Hah, C., and Neise, W., 2002, ASME J. Turbomachinery, 124 )
J. Turbomach (July,2002)
Closure to “Discussion of ‘An Experimental and Numerical Investigation into the Mechanisms of Rotating Instability’ ” (2002, ASME J. Turbomach., 124 )
J. Turbomach (July,2002)
Numerical Simulation and Evaluation of Velocity Fluctuations During Rotating Stall of a Centrifugal Pump
J. Fluids Eng (August,2011)
An Experimental Study of the Effect of Tube-to-Tube Ties on Fluidelastic Instability in an In-Line Tube Array
J. Pressure Vessel Technol (February,2000)
Related Proceedings Papers
Related Chapters
Vortex-Induced Vibration
Flow Induced Vibration of Power and Process Plant Components: A Practical Workbook
Pulsating Supercavities: Occurrence and Behavior
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Experimental and Statistical Study on the Noise Generated by Surface Defects of Bearing Rolling Bodies
Bearing and Transmission Steels Technology