Towards CAD-Based Shape Optimization of Aircraft Engine Nozzles

Bagy, Simon; Mohammadi, Bijan; Méheut, Michaël; Lallia, Mathieu; Coat, Pascal

doi:10.1007/978-3-030-57422-2_22

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Methods Of Convex Combination Based On Expert Knowledge1

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2020

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“…where λ i ∈ [0, 1] are the barycentric coordinates. The idea of this method, introduced for the first time in Bagy et al [14], is to perform optimization over the convex set, instead of the complete design space. Thus, the dimension of the problem is reduced to n and the global design variables have been replaced with…”

Section: Methods Of Convex Combination Based On Expert Knowledgementioning

confidence: 99%

Aerodynamic shape optimization of aircraft engine nozzles based on Computer-Aided Design

Bagy

Mohammadi²,

Méheut³

et al. 2020

AIAA Scitech 2020 Forum

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This study presents nozzle and cowl shape optimizations for turbofan separate-jet engines. The main objective of this work is to implement an optimization process including a detailed Computer-Aided Design (CAD) model and improve nozzles propulsive performance, taking into account the complete geometry of the aft-engine body. Integrating detailed CAD models in optimization workflows remains challenging, that is why an original approach is considered. This method uses expert knowledge to reduce dimensionality and enables to compute sensitivities with finite differences. The results illustrate the interest of this innovative industrial optimization approach for the design of turbofan nozzles.

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Section: Methods Of Convex Combination Based On Expert Knowledgementioning

confidence: 99%