A method is developed for performing simulations that contain fluid-structure interactions between deployable decelerators and a high speed compressible flow. The problem of coupling together multiple physical systems is examined with discussion of the strength of coupling for various methods. A non-monolithic strongly coupled option is presented for fluid-structure systems based on grid deformation. A class of algebraic grid deformation methods is then presented with examples of increasing complexity. The strength of the fluid-structure coupling is validated against two analytic problems, chosen to test the time dependent behavior of structure on fluid interactions, and of fluid on structure interruptions. A one-dimentional material heating model is also validated against experimental data.
Results are provided for simulations of a wind tunnel scale disk-gap-band parachute with comparison to experimental data. Finally, a simulation is performed on a flight scale tension cone decelerator, with examination of time-dependent material stress, and heating.
University of Minnesota Ph.D. dissertation. November 2010. Major: Aerospace Engineering and Mechanics. Advisor: Graham Candler. 1 computer file (PDF); viii, 89 pages. Ill. (some col.), appendices A-B
Gidzak, Vladimyr Mykhalo.
A method of simulating fluid structure interactions for deformable decelerators..
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