The sonic boom propagation codes reviewed in this study, SHOCKEN and ZEPHYRUS, implement current theory on air absorption using different computational concepts. Review of the codes with a realistic atmosphere model confirm the agreement of propagation results reported by others for idealized propagation conditions. ZEPHYRUS offers greater flexibility in propagation conditions and is thus preferred for practical aircraft analysis. The ZEPHYRUS code was used to propagate Mach 1.25 to 5000 feet away. These extrapolated signatures were compared to measurements at 5000 feet. Pressure values of the significant shocks (bow, canopy, inlet and tail) in the waveforms are consistent between extrapolation and measurement. Of particular interest is that four (independent) measurements taken under the aircraft centerline converge to the same extrapolated result despite differences in measurement conditions. Agreement between extrapolated and measured signature duration is prevented by measured duration of the 5000 foot signatures either much longer or shorter than would be expected. The duration anomalies may be due to signature probing not sufficiently parallel to the aircraft flight direction.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Sonic Boom Propagation Codes Validated by Flight Test


    Beteiligte:
    H. W. Pooling (Autor:in)

    Erscheinungsdatum :

    1996


    Format / Umfang :

    74 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch





    Comparison of Low-boom Predictions from Different Sonic Boom Propagation Codes

    Alexandra Loubeau / Sriram K Rallabhandi / Joel Barci Lonzaga et al. | NTRS


    Calculating Sonic-Boom Propagation

    Darden, C. M. / Ting, L. | NTRS | 1987


    Sonic boom eliminator and super sonic flight enhancer

    Europäisches Patentamt | 2018

    Freier Zugriff

    Sonic boom control and super sonic flight enhancement

    ALEXANDER SCOTT ROSS | Europäisches Patentamt | 2023

    Freier Zugriff