Multicycle large-eddy simulations (LES) of motored flow in an optical engine housed at the University of Michigan have been performed. The simulated flow field is compared against particle image velocimetry (PIV) data in several cutting planes. Circular statistical methods have been used to isolate the contributions to overall turbulent fluctuations from changes in flow direction or magnitude. High levels of turbulence, as indicated by high velocity root mean square (RMS) values, exist in relatively large regions of the combustion chamber. But the circular standard deviation (CSD), a measure of the variability in flow direction independent of velocity magnitude, is much more limited to specific regions or points, indicating that much of the turbulence is from variable flow magnitude rather than variable flow direction. Using the CSD is also a promising method to identify critical points, such as vortex centers or stagnation points, within the flow, which may prove useful for future engine designers.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Understanding In-Cylinder Flow Variability Using Large-Eddy Simulations


    Contributors:


    Publication date :

    2016




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    52.52 Thermische Energieerzeugung, Wärmetechnik / 52.30 Strömungskraftmaschinen, Turbomaschinen / 52.52 / 52.30



    Large Eddy Simulations of Wall-Mounted Cylinder in Supersonic Flow Using OVERFLOW

    Sherer, Scott E. / Morgan, Philip E. / Visbal, Miguel R. | AIAA | 2017


    Large Eddy Simulations of Flow Around a Cylinder with Uncertain Wall Heating

    Iaccarino, G. / Constantine, P. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2009


    Large Eddy Simulations of Flow Around a Cylinder with Uncertain Wall Heating

    Iaccarino, Gianluca / Constantine, Paul | AIAA | 2009



    GPU-Accelerated High-Fidelity Implicit Large Eddy Simulations of Coanda Cylinder Flow Instabilities

    Regev, Tom / Nestmann, Jonathan / Garzuzi, Anan et al. | AIAA | 2023