Shuchi Yang, Zhicun Wang, Zhichao Zhang, P.C. Chen

DOI Number: N/A

Conference number: IFASD-2017-039

A linearized unsteady solver, referred to as ZONA Unstructured Linearized Unsteady Solver (ZULUS), is developed to solve the linearized frequency-domain unsteady equation on an unstructured mesh using the steady background flow solution generated by the Navier-Stokes (N-S) solver. ZULUS can generate an accurate frequency-domain Generalized Aerodynamic Forces (GAF) in the small perturbation sense about a nonlinear steady flow condition with a transpiration boundary condition that is applied to the stationary surface mesh. The GAF can be directly plugged into the frequency-domain flutter solution techniques to generate flutter solutions rapidly. A linearized static aeroelastic analysis capability is also developed in ZULUS to include the static aeroelastic effects in the GAF. The measured flutter boundary of a twin-engine transport flutter model in the Transonic Dynamic Tunnel (TDT) of NASA Langley is used to validate ZULUS. It is found that the static aeroelastic effects have a major impact on the flutter boundary. With the static aeroelastic effects, the ZULUS’ predicted flutter boundary correlates much better with the TDT measured data than that without the static aeroelastic effects.

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In Categories: 1. IFASD 2017, 1.Events, Computational Aeroelasticity
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