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Numerical Simulation of 2D Panel Flutter in Compressible Flow using Compact Finite-Difference Method

Vafaei Sefti, Maryam | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50355 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Hejranfar, Kazem
  7. Abstract:
  8. In the present study, the numerical simulation of the panel flutter in compressible inviscid flow is performed by the compact finite difference method. For this purpose, the 2D compressible Euler equations written in the arbitrary Lagrange-Eulerian form are considered and the resulting system of equations in the generalized curvilinear coordinates is solved by the fourth-order compact finite-difference method. An appropriate nonlinear filter is applied for the shock capturing and for the solution to be stable. The governing equation for the panel is also numerically solved by using the fourth-order compact finite difference method. The time integration in the flow domain is made by the fourth-order Runge-Kutta scheme and the dual-time implicit method is used in the structure domain. The numerical solution of the compressible flow for the stationary and moving isentropic vortex and also the shock-vortex interaction is carried out to assess the accuracy of the numerical method in the flow domain. The results obtained are compared with the analytical and numerical results which exhibit good agreement. The effects of different numerical parameters such as the filter coefficient and the grid size on the accuracy of the solution are also studied. To evaluate the accuracy of the numerical method used for the solution of the structural domain, both the pinned and clamped beams under constant and time-variable loading is simulated. The present results are comparable with the analytical and numerical results. Then, the panel flutter in supersonic flow is simulated though computing both the fluid and structure domains and some results are presented
  9. Keywords:
  10. Panel Flutter ; Compact Finite Difference Method ; Fluid-Structure Interaction ; Two Dimentional Numerical Simulation ; Compressible Inviscid Flow

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