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- W2320550897 abstract "A general purpose discrete adjoint formulation for robust and efficient fluid dynamic design optimization, with different flow solvers, is presented and tested on various twoand three-dimensional inviscid flow problems. An approximate, dissipative flow solver is used to develop the discrete quasi-timedependent adjoint equations. The resulting design sensitivities are very robust even in the presence of noise or other non-smoothness associated with objective functions in many highspeed flow problems. The optimization is performed using a sequence of progressively finer grids for the solution of the flow field, together with a progressive optimization, whereby a sequence of a partially converged flow solutions is followed by an optimization step. The sensitivity derivative variations are limited to preserve the smoothness of the progressive procedure. A flow solver is required to compute the flow field. First, the adjoint equations are coupled with an accurate in-house flow solver to test the approach on some inverse design problems involving twoand three-dimensional transonic, subsonic and incompressible nozzle flows. The methodology is shown to be robust and highly efficient. Then, the previous design test cases are re-computed coupling the suggested adjoint formulation with commercial and open source flow solvers, without noticing any significant difference in the optimization convergence histories. This evidence prove the employed adjoint formulation to be quite general, because it allows to perform accurate and efficient design optimization using different flow solvers. Moreover, the two-dimensional incompressible design test case is re-computed coupling the suggested compressible adjoint formulation with a commercial incompressible flow solver; the successful optimization further substantiates the present discrete adjoint formulation to be a general purpose adjoint formulation, which can even be coupled to incompressible flow solvers." @default.
- W2320550897 created "2016-06-24" @default.
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- W2320550897 date "2014-01-10" @default.
- W2320550897 modified "2023-09-27" @default.
- W2320550897 title "A General Purpose Adjoint Formulation for Inviscid 2D/3D Fluid Dynamic Optimization" @default.
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- W2320550897 doi "https://doi.org/10.2514/6.2014-1174" @default.
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