SCIPVIS, the computational model discussed by Dash et al. (1985), is assessed in predicting the complicated flow structure associated with shock-containing plumes. In addition, the analysis in this study examines this code's applicability as a basic part of a program for estimating broadband shock noise radiation. The results of this study show that excellent agreement exists between predicted and measured static pressure distributions for both underexpanded and overexpanded flow cases considered. Of the three turbulence closure models incorporated in the SCIPVIS code, the kW model of Spalding produces the most uniform agreement with measurement. The k-epsilon-2 model of Launder consistently overestimates plume spreading for supersonic jets with exit Mach numbers in the 1-2 range. Dash's (1983) k-epsilon-2-cc, compressibility-corrected version of Launder's model underestimates plume spreading. Good qualitative agreement was also obtained between the measured longitudinal turbulence intensity and that predicted by the code for the same trial case. Comparison of measured and predicted broadband shock noise spectrum peak values were found to be in excellent agreement. This utilized a variant of the Harper-Bourne and Fisher (1973) phase-array model: the effective shock spacing was reinterpreted as the value of the end of the plume potential core, determined herein by the SCIPVIS code.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Analysis of turbulent underexpanded jets. II - Shock noise features using SCIPVIS


    Contributors:
    Seiner, J. M. (author) / Dash, S. M. (author) / Wolf, D. E. (author)

    Published in:

    Publication date :

    1985-05-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Analysis of turbulent underexpanded jets. II - Shock noise features using SCIPVIS

    SEINER, J. M. / DASH, S. M. / WOLF, D. E. | AIAA | 1985


    Structure of turbulent sonic underexpanded free jets

    LAI, M.-C. / FAETH, G. | AIAA | 1988


    Structure of turbulent sonic underexpanded free jets

    CHUECH, S. G. / LAI, M.-C. / FAETH, G. M. | AIAA | 1989


    Experimental study of shock-cell noise in underexpanded supersonic jets

    Savarese, Alessandro / Jordan, Peter / Girard, Steve et al. | AIAA | 2013