マルチカメラによる非軸対称入口障害板付きポンプインデューサのキャビテーション観察 Cavitation in Pump Inducer with Axi-Asymmetrical Inlet Plate Observed by Multi-Cameras

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The attachment of inducer in front of main impeller is a powerful method to improve cavitation performance. In operating condition at partial flow rate and extremely low suction pressure, however cavitation surge oscillation occurs. As the cavitation surge oscillation with low frequency occurs in a close relation between the inlet back-flow cavitation and the growth of blade cavity to the throat section of blade passage, one method of installing an axi-asymmetrical plate upstream of inducer is proposed to suppress the oscillation. It is considered as the suppression mechanism of oscillation conceptually to avoid making flow at all throat sections unstable simultaneously due to inlet flow distortion by suction axi-asymmetrical plate. In the present study, cavitation behaviors in the inducer is observed with distributing multi-cameras circumferentially, recording simultaneously and reconstructing multi-photos on one plane field as moving a linear cascade. Observed results are utilized for discussion with other measuring results as casing wall pressure distribution. Then the suppression mechanism of oscillation by installing axi-asymmetrical inlet plate will be clarified in more details.

収録刊行物

  • ターボ機械 = Turbomachinery  

    ターボ機械 = Turbomachinery 36(8), 477-482, 2008-08-10 

    Turbomachinery Society of Japan

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各種コード

  • NII論文ID(NAID)
    10021103918
  • NII書誌ID(NCID)
    AN00004836
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03858839
  • NDL 記事登録ID
    9592549
  • NDL 雑誌分類
    ZN15(科学技術--機械工学・工業--流体機械)
  • NDL 請求記号
    Z16-978
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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