Improvement of lift-to-drag ratio of the aero-train

Yasuaki Kohama, Dong Hee Yoon

    Research output: Chapter in Book/Report/Conference proceedingChapter


    Aero-Train is a new concept of environment friendly high speed transport system invented by our group. In order to realize this concept, improvement of the aerodynamic performance is essential. Our goal is to attain the overall lift to drag ration up to 25. Presently it is around 13 to 15. Some of the possible reasons why the value is low are in the interference drag and induced drag around lifting and guide wing junction. Flow separates largely at suction surfaces of the wing section enhanced by the existence of horizontal and vertical walls. Separation control study is conducted in present investigation using CFD and EFD approaches. Drastic improvement of lift to drag ratio was achieved by introducing several devices at the wing section.

    Original languageEnglish
    Title of host publicationSixth IUTAM Symposium on Laminar-Turbulent Transition
    Number of pages6
    Publication statusPublished - 2006 Dec 1

    Publication series

    NameFluid Mechanics and its Applications
    ISSN (Print)0926-5112


    • Environment friendly high speed transport system
    • Flow separation control
    • Lift-to drag ratio
    • Wing-in-Ground effect
    • Wing-wing interaction

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Mechanical Engineering
    • Fluid Flow and Transfer Processes


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