Accession Number : ADA623612


Title :   Verification and Validation of the Spring Model Parachute Air Delivery System in Subsonic Flow


Descriptive Note : Final rept. 20 Sep 2013-31 Oct 2014


Corporate Author : STATE UNIV OF NEW YORK AT STONY BROOK RESEARCH FOUNDATION


Personal Author(s) : Li, Xiaolin


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a623612.pdf


Report Date : 27 Feb 2015


Pagination or Media Count : 35


Abstract : A mesoscale spring-mass model is used to mimic fabric surface motion. Through coupling with an incompressible fluid solver, the spring-mass model is applied to the simulation of the dynamic phenomenon of parachute inflation. Our model is shown to be numerically convergent under the constraints that the summation of points masses is constant and that both the tensile stiffness and the angular stiffness of the spring conform with the material's Young modulus and Poisson ratio. Complex validation simulations conclude the effort via drag force comparisons with experiments.


Descriptors :   *AERIAL DELIVERY , *PARACHUTES , *SUBSONIC FLOW , FABRICS , INCOMPRESSIBLE FLOW , INFLATING , POISSON RATIO , STIFFNESS , TENSILE PROPERTIES , VALIDATION , VERIFICATION


Subject Categories : Gliders and Parachutes
      Military Operations, Strategy and Tactics
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE