Inflation analysis of ram air inflated gliding parachutes

William L. Garrard, Tayfun E. Tezduyar, Shahrouz K. Aliabadi, Vinay Kalro, Joel Luker, Sanjay Mittal

Research output: Contribution to conferencePaper

16 Scopus citations

Abstract

This paper discusses two approaches for the analysis of the inflation of ram air inflated gliding parachutes. In one method the point mass equations of motion are solved with time-varying Lift and drag areas. This approach requires experimental data in order to construct the appropriate lift and drag area curves. The approach appears useful in analyzing parachute systems which are similar to systems for which data are available. On the other hand. the predictive accuracy of this approach is questionable for parachute systems which differ significantly from those for which data are available. The second method involves the finite element solution of the 3D equations of motion for the unsteady fluid dynamics equations around a falling, expanding box which models the inflating canopy. This technique can be used to model conceptual parachute designs for which no empirical data is available. These solutions require sophisticated numerical techniques and a high-performance computing platform and are not suitable for repetitive design studies and trade-off analyses. Our strategy will be to combine the two approaches by using the numerical solutions to generate lift and drag data and to incorporate these data in the flight mechanics simulations. The 3D solution of the flow field equations can be regarded as a numerical experiment in which the data generated can be used in simple flight mechanics simulations.

Original languageEnglish (US)
Pages186-198
Number of pages13
DOIs
StatePublished - Jan 1 1995
Event13th AIAA Aerodynamic Decelerator Systems Technology Conference, 1995 - Clearwater Beach, United States
Duration: May 15 1995May 18 1995

Other

Other13th AIAA Aerodynamic Decelerator Systems Technology Conference, 1995
CountryUnited States
CityClearwater Beach
Period5/15/955/18/95

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    Garrard, W. L., Tezduyar, T. E., Aliabadi, S. K., Kalro, V., Luker, J., & Mittal, S. (1995). Inflation analysis of ram air inflated gliding parachutes. 186-198. Paper presented at 13th AIAA Aerodynamic Decelerator Systems Technology Conference, 1995, Clearwater Beach, United States. https://doi.org/10.2514/6.1995-1565