Turbomachinery
Online ISSN : 1880-2338
Print ISSN : 0385-8839
ISSN-L : 0385-8839
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Volume 43, Issue 5
Displaying 1-1 of 1 articles from this issue
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Technical papers
  • Studies on the Unsteady Aerodynamic Force and Turbine Efficiency of a Partial Admission Supersonic Turbine for a Rocket Engine
    Yuki TOKUYAMA, Ken-ichi FUNAZAKI, Hiromasa KATO, Mitsuru SHIMAGAKI, Ma ...
    Article type: Technical papers
    2015 Volume 43 Issue 5 Pages 313-319
    Published: 2015
    Released on J-STAGE: January 11, 2018
    DOIhttps://doi.org/10.11458/tsj.43.5_313
    JOURNAL FREE ACCESS
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    Partial admission turbines are often used in upper stage engine for a rocket in order to avoid designing too low aspect ratio turbine or small turbine diameter. There are very few studies focusing on supersonic partial admission turbine for a rocket engine. This study deals with numerical investigation of two dimensional unsteady flow field in a supersonic turbine with partial admission. Three cases, full admission, partial admission with one blockage region and partial admission with three blockage regions, are simulated and compared. Results indicate that rapid flow acceleration and sharp pressure drop occur at the blockage inlet region. This pressure drop causes unsteady aerodynamic force on rotor blades, especially upstream direction force. Turbine efficiency decrease becomes larger with increase of number of blockage regions.
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