Visualization of Flow Fields and Numerical Calculation of Collection Efficiency in Low Pressure Impactor

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Flow fields of nitrogen (N<SUB>2</SUB>) and argon (Ar) gases in a low pressure impactor are visualized by using a Laser Induced Fluorescence (LIF) technique of iodine molecules under typical MLIS (Molecular Laser Isotope Separation) operating conditions for uranium hexafluoride (UF<SUB>6</SUB>). The flow fields with different pressure ratios (downstream pressure/upstream pressure) and nozzle-to-plate distance are examined. It is shown that various shock waves exist in the low pressure impactor. The axisymmetric Euler equation is solved by using the Harten-Yee TVD method. The calculated shapes and locations of shock agree well with experimental data obtained by LIF. The calculated solutions compared with those previously calculated, however, a remarkable difference is observed between these two calculated results.<BR>With the aid of calculated flow fields, the collection efficiency is determined by tracking the particle trajectories. The diameter of 50% collection is found to be dependent on the pressure ratios and nozzle-to-plate distance. It is shown that the dependency of diameter of 50% collection on these parameters is different between this study and previously calculated one.

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  • Journal of nuclear science and technology  

    Journal of nuclear science and technology 35(6), 425-436, 1998-06-25 

    Atomic Energy Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002079581
  • NII書誌ID(NCID)
    AA00703720
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00223131
  • NDL 記事登録ID
    4503990
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z53-A460
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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