Turbulent Fluctuation behind Pleated Air Filters: (A Numerical Study on Air Flow Turbulence behind Pleated Air Filters)

Yoshihide Suwa, Shuji Fujii, Gouping Xie

研究成果査読

抄録

Investigations for air flow turbulences are quite important to clarify small-particle contamination mechanisms in clean chambers. Strongly fluctuated air flow turbulence is recognized behind pleated air filters. Turbulent flow characteristics behind pleated high-efficiency particulated air filters are numerically analyzed and studied by direct simulation using a 3rd-order Kawamura-Kuwahara scheme. As the result of the study, the following typical phenomena were found: (1) Free shear caused by flow velocity nonuniformity makes vortex streets behind the filter ends. These vortex streets interfare with neighboring streets and spanwise synchronized fluctuation is generated. (2) Streamwise distribution of <u′2> has a sharp peak with some distance from the filter ends. This peak appears at the position the vortex interference starts. Rate of the mean velocity change becomes maximum in this position. (3)Results calculated by direct simulation are qualitatively in good agreement with the experimental results.

本文言語English
ページ(範囲)1587-1592
ページ数6
ジャーナルTransactions of the Japan Society of Mechanical Engineers Series B
58
549
DOI
出版ステータスPublished - 1992
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 機械工学

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