A three-dimensional numerical investigation into aerodynamic feature of the turbocharger turbine under pulsating flow conditions is conducted in this paper. Dual time stepping approach is applied to solve the unsteady Navier-Stokes equations, while the Jameson central scheme is brought in for spatial discretization, and Spalart-Allmaras turbulence model is employed in order to get good viscous resolution, accuracy and computing efficiency. The quasi-steady and unsteady performance of the turbine is given and compared. Five blade passage cross sections are chosen to analyze the structure of the secondary flow at 4 key instants. The developments of different vortex, especially the tip leakage vortex, passage vortex are discussed. The results have shown that the unsteady performance deviates substantially from quasi-steady performance, and the secondary flow structure varies tremendously under the pulsating flow conditions.


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    Titel :

    Investigation of Flow Structure in a Turbocharger Turbine under Pulsating Flow Conditions


    Beteiligte:
    Chen, Li (Autor:in) / Zhuge, Weilin (Autor:in) / Zhang, Yangjun (Autor:in) / Li, Yazhuo (Autor:in) / Zhang, Shuyong (Autor:in)

    Kongress:

    2008 SAE International Powertrains, Fuels and Lubricants Congress ; 2008 ; Shanghai, China


    Erschienen in:

    Erscheinungsdatum :

    15.04.2009




    Medientyp :

    Aufsatz (Zeitschrift) , Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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