Turbomachinery
Online ISSN : 1880-2338
Print ISSN : 0385-8839
ISSN-L : 0385-8839
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Volume 43, Issue 7
Displaying 1-2 of 2 articles from this issue
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Technical papers
  • Verification of Cavitation Surge Suppression in Three-Bladed Inducer with Axi-Asymmetrical Baffle Plate
    Kohei YAMAMOTO, Koichi ISHIZAKA, Satoshi WATANABE, Shinichi TSUDA, Aki ...
    Article type: Technical papers
    2015 Volume 43 Issue 7 Pages 425-432
    Published: 2015
    Released on J-STAGE: February 11, 2018
    DOIhttps://doi.org/10.11458/tsj.43.7_425
    JOURNAL FREE ACCESS
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    In our previous study, it has been found that installing an axi-asymmetrical baffle plate upstream of cavitating inducer is very effective for the suppression of cavitation surge in two-bladed flat plate helical inducer. In the present study, to obtain the design guideline of this suppression device, it was applied for the suppressions of cavitation surge and rotating cavitation in a three-bladed inducer. It was confirmed that the cavitaion surge could be well suppressed by this device, especially when installed at about 55% tip diameter upstream of inducer leading edge; this location is similar to that for the effective suppression in two-bladed inducer. Rotating cavitation could be also weakened by this device, but the effect was very limited.
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  • Study on Improvement of Pressure Characteristic in Right Ventricular Assist Centrifugal Blood Pump
    Masaaki HORIE, Motoki TSUJIUCHI, Masaya MIZOKOSHI
    Article type: Technical papers
    2015 Volume 43 Issue 7 Pages 433-441
    Published: 2015
    Released on J-STAGE: February 11, 2018
    DOIhttps://doi.org/10.11458/tsj.43.7_433
    JOURNAL FREE ACCESS
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    Many of serious left ventricle failure patients suffer from right ventricle disease, therefore, right ventricle assist blood pump is necessary for bridge to transplantation. Moreover, the designing of the right ventricular assist centrifugal blood pump by conventional pump design method is difficult, as the specific speed is low, as well as the left ventricular assist centrifugal blood pump. In the present study, the shape of the right ventricular assist centrifugal blood pump, which has gradual pressure drop characteristic within the range of adult blood flow rate, was investigated by the CFD analysis. As a result, it was found that suitable pressure for assisting the right ventricular by adopting appropriate volute and vane shape is obtained, and the maximum pump efficiency is about 45%, which doesn't increase even if various vane shapes are changed.
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