The results of the first phase of an optimization study on a parametric procedurally-generated lobe mixer are presented. This mixer is part of a dual-stream plug nozzle system, designed under NASA’s CST project for use in near-term commercial supersonic applications. Data was obtained numerically using NASA’s in-house CFD code FUN3D and analyzed to determine mixer performance. Phase I of the study examined five independently-variable geometric parameters describing the lobe mixer. Methods of Design of Experiments (DoE) were used to obtain a parametric model to quickly evaluate mixer performance and determine an optimum configuration. Mixers that induced strong axial vorticity and shear layers without causing flow separation were found to perform best, with exit temperature variance highly inversely correlated to mixing effectiveness.


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    Title :

    Optimization of a Parametric Lobe Mixer for Internally Mixed Nozzles


    Contributors:

    Conference:

    AIAA Aviation Forum ; 2022 ; Chicago, IL, US


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English