A Mach 2.0 round jet at design and off-design condition is experimentally manipulated using two steady radial injectors to investigate the effect of fluidic injection on jet mixing. A new scaling law for L c * , the supersonic core length of manipulated supersonic free jets, is found as L c * = f 1 ( M R N / [ γ M j 2 p e / p a ] ) , where L c * is normalized by the nozzle throat diameter D th , γ is the specific heats ratio, M j is the ideally expanded jet Mach number, M R N is the momentum ratio of the individual injector jet to the main jet, and p e / p a is the expansion ratio of the main jet. The discussion pertaining to the scaling law provides an important insight into the choice of diameter ratio d / D for efficient jet manipulation, where d and D are the injector and nozzle exit diameters, respectively. Such insight can yield valuable information on the practical usability of fluidic injectors for the full-scale applications. It is also documented that fluidic injectors can provide an effective flow control mechanism for jet mixing applications in comparison to the elliptic jet.


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    Title :

    Design of Fluidic Injector for Supersonic Jet Manipulation


    Contributors:

    Published in:

    AIAA Journal ; 60 , 8 ; 4639-4648


    Publication date :

    2022-03-31


    Size :

    10 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






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