Date and Place: Thursdays and hybrid (live in 32-349/online via Zoom). For detailed dates see below!
Content
In the Scientific Computing Seminar we host talks of guests and members of the SciComp team as well as students of mathematics, computer science and engineering. Everybody interested in the topics is welcome.
List of Talks
Event Information:
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Thu03Nov2016
SC Seminar: Emre Özkaya
11:30SC Seminar Room 32-349
Title:
A Two-level approach for design optimization of acoustic linersAbstract:
In this talk, we present a two-level approach for design optimization of acoustic liners panels, which are commonly used to damp engine noise in turbofan engines. The suggested method combines an adjoint-based gradient search algorithm with a global search method applied on a Gaussian process surrogate model. In this way, we effectively exploit the benefits of both approaches to achieve a good compromise between the computational effort and the degree of freedom used in optimization. In the optimization level, a global search is performed with few design parameters employing a Gaussian process surrogate model. In the second level, using the global optimal solution as the initial setting for the refined design vector, an adjoint based gradient search procedure is started. The unsteady discrete adjoint solver, which is the essential ingredient of the optimization framework, has been developed using Algorithmic Differentiation (AD) techniques. The feasibility of the two-level approach is demonstrated by finding the optimal liner parameters of a turbofan engine by-pass duct.