A dual-input/single-output extremum-seeking control system has been developed to manipulate a turbulent round jet based on a radially injected unsteady minijet. The Reynolds number R e D , based on the nozzle diameter of the main jet, is from 5700 to 13,300. It has been demonstrated that this system may obtain rapidly and simultaneously the optimum excitation frequency f e and mass flow rate Q of the minijet, thus achieving the maximum decay rate K of the jet centerline mean velocity, as confirmed by the open-loop control results. This technique is robust to the parametric uncertainty with respect to R e D within the tested range and adaptable when the initial control parameters are varied. It has been further found that the maximum K remains the same, be it a decrease or increase in R e D , that is, the control performance is essentially independent of R e D .


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    Title :

    Dual-Input/Single-Output Extremum-Seeking System for Jet Control


    Contributors:
    Wu, Z. (author) / Wong, C. W. (author) / Zhou, Y. (author)

    Published in:

    AIAA Journal ; 56 , 4 ; 1463-1471


    Publication date :

    2018-04-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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