Pressure-sensitive paint measurement on co-rotating disks in a hard disk drive

Tomohiro Kameya*, Yu Matsuda, Hiroki Yamaguchi, Yasuhiro Egami, Tomohide Niimi


研究成果: Article査読

11 被引用数 (Scopus)


There is much demand for improvement in the performance of a hard disk drive (HDD) along with recent rapid developments of information technology. While high-speed disk rotation of a HDD is necessary to accommodate such needs, it causes disk flutter induced by pressure fluctuation on disks and degrades reliability of a HDD. In order to understand the mechanism of the fluttering phenomenon, it is important to know pressure field on the rotating disk. However, it is impossible to measure the pressure by ordinary methods such as pressure taps. Pressure-sensitive paint (PSP) is a pressure measurement technique based on the oxygen quenching of luminescence and enables us to measure the pressure non-invasively. In general, however, the temperature sensitivity of PSP makes it difficult to measure the precise pressure on the surface with temperature distribution. We measured the time-averaged pressure on the disk rotating at 10 00020 000 rpm for the first time by adopting a temperature-insensitive PSP composed of pyrene sulfonic acid (PySO3H) as a luminophore. It was found that the pressure forms a concentric circular distribution and decreases toward the center of the disk. Additionally, we elucidate how disk rotational speed and spacing between co-rotating disks influence on the pressure field.

ジャーナルOptics and Lasers in Engineering
出版ステータスPublished - 2012 1月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 機械工学
  • 電子工学および電気工学


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