The High Velocity Airflow System (HIVAS) facility at the Naval Air Warfare Center (NAWC) at China Lake was successfully used as an alternative to flight test to determine parachute drag performance of two small Capsule Parachute Assembly System (CPAS) canopies. A similar parachute with known performance was also tested as a control. Realtime computations of drag coefficient were unrealistically low. This is because HIVAS produces a non-uniform flow which rapidly decays from a high central core flow. Additional calibration runs were performed to characterize this flow assuming radial symmetry from the centerline. The flow field was used to post-process effective flow velocities at each throttle setting and parachute diameter using the definition of the momentum flux factor. Because one parachute had significant oscillations, additional calculations were required to estimate the projected flow at off-axis angles. The resulting drag data from HIVAS compared favorably to previously estimated parachute performance based on scaled data from analogous CPAS parachutes. The data will improve drag area distributions in the next version of the CPAS Model Memo.


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    Titel :

    Testing Small CPAS Parachutes Using HIVAS


    Beteiligte:

    Kongress:

    22nd AIAA Aerodynamic Delerator Systems ; 2013 ; Daytona Beach, FL, United States


    Erscheinungsdatum :

    2013-01-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Testing Small CPAS Parachutes Using HIVAS

    Ray, Eric / Hennings, Elsa J. / Bernatovich, Michael | AIAA | 2013


    Testing Small CPAS Parachutes Using HIVAS

    Ray, E. / Hennings, E.J. / Bernatovich, M. et al. | British Library Conference Proceedings | 2013


    Photogrammetric Analysis of CPAS Main Parachutes

    Ray, Eric / Bretz, David / Morris, Aaron | AIAA | 2011


    Photogrammetric Analysis of CPAS Main Parachutes

    Ray, E. / Bretz, D. / Morris, A. et al. | British Library Conference Proceedings | 2011