Turbomachinery
Online ISSN : 1880-2338
Print ISSN : 0385-8839
ISSN-L : 0385-8839
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Volume 42, Issue 11
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Technical papers
  • Influence of Inlet Duct Shape on Turbine Performance of Turbocharger for Automobile
    Yoshitaka IWASA, Takahiro BAMBA, Satoshi YAMAGUCHI
    Article type: Technical papers
    2014 Volume 42 Issue 11 Pages 727-732
    Published: 2014
    Released on J-STAGE: December 09, 2017
    DOIhttps://doi.org/10.11458/tsj.42.11_727
    JOURNAL FREE ACCESS
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    Demand of two-stage turbocharger is increasing for large engine applications. Generally, these turbo chargers have a curved duct at the inlet or at the outlet. Such curved duct is required to achieve compact designs, however, these sometimes lead to drop in performance. Therefore, for a given mount condition, it is important to design such ducts so that performance reduction is minimized as much as possible. In this paper, the flow pattern of a low-pressure turbine of a two-stage turbocharger is calculated, and performance reduction as well as its cause is discussed. The results show that, for the specific case analyzed, turbine efficiency decreases by 4% due to flowing along the outer side of the curved sector of the duct, however, it is also found impact on turbine wheel performance is small.
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