Abstract
The concept of virtual mass is described, and experiments are outlined in which virtual mass and virtual inertia components for a parachute canopy were determined. Results show that these components depend on the canopy shape and its attitude relative to the airflow; they also depend on the dimensionless acceleration, or acceleration number, of the parachute. Except at high values of acceleration number, these virtual inertia terms are of greater magnitude than corresponding values determined by potential flow methods, and this is characteristic of unsteady bluff-body flows. Their significance is indicated in dynamic behavior prediction for the descending fully deployed parachute canopy.
Published Version
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