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- W3136133609 abstract "A gradient-based aeroelastic shape optimization framework making use of a reduced or model to substitutea parameterization based on computer-aided design software is presented. The design software is usedinitially to generate a parametric model of a three-dimensional transport aircraft configuration. To streamlinethe actual optimization process, the computer-aided design model is replaced with a parametric reducedorder model based on proper orthogonal decomposition that is capable of predicting discrete surfacedisplacement fields as a function of the design parameters. During the optimization, surface displacementsare computed according to the current design parameters and applied on the baseline shape. In everyoptimization step, the aircraft's steady-state equilibrium of forces and moments are satisfied by a trimmingalgorithm and the Reynolds-averaged Navier-Stokes solver TAU is coupled with a linear structural finiteelement method model. Gradients are computed analytically by using geometric sensitivities provided by thereduced order model and by applying the adjoint method to the flow solver and the mesh deformation tool.The workflow is embedded within FlowSimulator, a multiphysics environment for high performancecomputing.The optimization process is demonstrated for a high-dimensional wing parameterization with 126 degrees offreedom. The aircraft cruise drag could be significantly reduced by 6% on a series of three continuouslyrefined meshes for the aerodynamic analysis. For an accurate representation of the optimal shape by thecomputer-aided design software after the optimization, the approximation error introduced by the reducedorder modelling approach must be sufficiently small. Therefore, the accuracy of the predictions wasanalyzed. The results identify the main source of the geometric error and quantify their effect on the dragreduction gained by the optimization." @default.
- W3136133609 created "2021-03-29" @default.
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- W3136133609 date "2018-09-05" @default.
- W3136133609 modified "2023-09-27" @default.
- W3136133609 title "Gradient-based Optimization of a flexible long-range transport Aircraft using a high-dimensional CAD-ROM Parameterization" @default.
- W3136133609 hasPublicationYear "2018" @default.
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