Reynolds-Averaged Navier Stokes (RANS) computations are presented for mixed and displacement ventilation configurations in an aircraft cabin of the Airbus A-320 type. For thermal boundary conditions of the thirty-eight passenger models in thirteen seat rows, constant heat fluxes are employed. To analyze the climate and comfort feeling in the cabin, temperature and velocity distributions are studied. Further, heat radiation is modelled for both mixed and displacement ventilation and the results are then compared to results for which radiation modelling was switched off. In mixed ventilation configurations it can be observed that a more antisymmetric flow in the cabin is generated than in displacement ventilation configurations. The thermal comfort can be assumed to be superior to that in mixed ventilation setups since the velocity magnitudes are smaller in general. For displacement ventilation configurations, the mean temperature is further much reduced compared to mixed ventilation setups. URANS computations show the time dependency of the flow structures and are therefore more exact and detailed compared to the steady-state simulations. Finally, heat radiation modelling is necessary to reflect for realistic surface temperatures of the passenger models.


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    Title :

    Rans computations of mixed and displacement ventilation in an aircraft cabin


    Additional title:

    RANS-Simulationen zur Mischungs- und Verschiebungsventilation in einer Flugzeugkabine


    Contributors:


    Publication date :

    2011


    Size :

    7 Seiten, 5 Bilder, 1 Tabelle, 14 Quellen




    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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