A new cascade-less engine operated from subsonic to hypersonic conditions

Designed by computational fluid dynamics of compressible turbulence with chemical reactions

Ken Naitoh, Kazushi Nakamura, Takehiro Emoto

    Research output: Contribution to journalArticle

    29 Citations (Scopus)

    Abstract

    By using our computational fluid dynamic models, a new type of single engine capable of operating over a wide range of Mach numbers from subsonic to hypersonic regimes is proposed for airplanes, whereas traditional piston engines, turbojet engines, and scram engines work only under a narrower range of operating conditions. The new engine has no compressors or turbines such as those used in conventional turbojet engines. An important point is its system of super multijets that collide to compress gas for the transonic regime. Computational fluid dynamics is applied to clarify the potential of this engine. The peak pressure at the combustion center is over 2.5 MPa, while that just before ignition is over 1.0 MPa. The maximum power of this engine will be sufficient for actual use. Under the conditions of higher Mach numbers, the main intake passage located in front of the super multijet nozzles, takes in air more. That results in a ram or scramjet engine for supersonic and hypersonic conditions.

    Original languageEnglish
    Pages (from-to)481-485
    Number of pages5
    JournalJournal of Thermal Science
    Volume19
    Issue number6
    DOIs
    Publication statusPublished - 2010 Dec

    Fingerprint

    hypersonics
    computational fluid dynamics
    engines
    chemical reactions
    cascades
    turbulence
    turbojet engines
    Mach number
    piston engines
    supersonic combustion ramjet engines
    ram
    transonic flow
    turbines
    compressors
    dynamic models
    ignition
    nozzles
    air
    gases

    Keywords

    • Aircraft engine
    • compressible flow
    • multijets
    • twister system

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

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    AU - Nakamura, Kazushi

    AU - Emoto, Takehiro

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