In this paper, the authors present a novel technique for generating swirl inlets for large eddy simulation. The velocity a short distance downstream of the inlet to the main domain is sampled and the flow velocity data are reintroduced back into the domain inlet, creating an inlet section integrated into the main domain in which turbulence can develop. Additionally, variable artificial body forces and velocity corrections are imposed in this inlet section, with feedback control to force the flow toward desired swirl, mean, and turbulent profiles. The method was applied to flow in an axisymmetric sudden expansion, with and without swirl at the inlet, and compared against experimental and literature large eddy simulation data and against similar results in the literature. The method generates excellent results for this case and is elegant and straightforward to implement.


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    Title :

    Inlet conditions for large eddy simulation of gas-turbine swirl injectors


    Additional title:

    Eintrittsbedingungen für die Großwirbelsimulation von Gasturbinen-Einspritzdüsen


    Contributors:

    Published in:

    AIAA Journal ; 46 , 7 ; 1782-1790


    Publication date :

    2008


    Size :

    9 Seiten, 11 Bilder, 29 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English