Basic Study on Loss Torque of Rotating Polygon Mirror (1st Report, Numerical Analysis for Three-Dimensional Unsteady Flow)

Toshiyuki Hayase, Soichi Isobe, Kimio Komata, Daisuke Konno

Research output: Contribution to journalArticlepeer-review

Abstract

A rotating polygon mirror is commonly used in contemporary printing devices. The understanding of the flow field around the rotating mirror is essential for analysis and design, since reduction of the hydrodynamic load torque directly leads to an improvement in the performance. In this paper, a numerical analysis has been conducted for the flow in the space between a fixed outer cylinder and a rotating octagonal inner cylinder. Discretized transport equations are solved for two-dimensional and three-dimensional time-dependent constant property flows using a second-order accurate finite volume scheme within the context of SIMPLER-based iterative methodology. Two-dimensional calculations show a shear-driven recirculating flow in cavity regions, while three-dimensional calculations reveal a distinct turbulent flow structure. The hydrodynamic loss torque is mainly due to an asymmetric pressure distribution on the polygon surface especially at high rotating speed. This result is qualitatively confirmed by a simple model experiment.

Original languageEnglish
Pages (from-to)2679-2683
Number of pages5
Journaltransactions of the japan society of mechanical engineers series c
Volume60
Issue number576
DOIs
Publication statusPublished - 1994
Externally publishedYes

Keywords

  • Computational Fluid Dynamics
  • Information Processing Equipment
  • Optical Instrument
  • Polygon Mirror
  • Rotary Machinery
  • Swirling Flow
  • Turbulent Flow

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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