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dc.contributor.authorMarsden, Alison L.
Wang, Meng
Dennis, John E.
Moin, Parviz
dc.date.accessioned 2018-06-18T17:52:01Z
dc.date.available 2018-06-18T17:52:01Z
dc.date.issued 2004-04
dc.identifier.citation Marsden, Alison L., Wang, Meng, Dennis, John E., et al.. "Optimal Aeroacoustic Shape Design Using the Surrogate Management Framework." (2004) https://hdl.handle.net/1911/102017.
dc.identifier.urihttps://hdl.handle.net/1911/102017
dc.description.abstract Shape optimization is applied to time-dependent trailing-edge flow in order to minimize aerodynamic noise. Optimization is performed using the surrogate management framework (SMF), a non-gradient based pattern search method chosen for its efficiency and rigorous convergence properties. Using SMF, design space exploration is performed not with the expensive actual function but with an inexpensive surrogate function. The use of a polling step in the SMF guarantees that the algorithm generates a convergent subsequence of mesh points, each iterate of which is a local minimizer of the cost function on a mesh in the parameter space. Results are presented for an unsteady laminar flow past an acoustically compact airfoil. Constraints on lift and drag are handled within SMF by applying the filter pattern search method of Audet and Dennis, within which a penalty function is used to form and optimize a surrogate function. Optimal shapes that minimize noise have been identified for the trailing-edge problem in constrained and unconstrained cases. Results show a significant reduction (as much as 80%) in acoustic power with reasonable computational cost using several shape parameters. Physical mechanisms for noise reduction are discussed.
dc.format.extent 24 pp
dc.title Optimal Aeroacoustic Shape Design Using the Surrogate Management Framework
dc.type Technical report
dc.date.note April 2004
dc.identifier.digital TR04-05
dc.type.dcmi Text


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