Discrete boundary smoothing using control node parameterisation for aerodynamic shape optimisation

A Study of Shape Parameterisation Methods for Airfoil Optimisation

This paper presents a study on parameterisation methods for airfoil shape optimisation within a CAD-based design optimisation framework. The objective of the paper is to study the effect of different methods on airfoil shape optimisation when using computational fluid dynamics (CFD). Parameterisation of geometry is one of the essential requirements in shape optimisation, and it presents further...

Multilevel gradient method with Bézier parametrisation for aerodynamic shape optimisation

Since the evaluation of the cost functional requires the solution of the governing flow equations (0.2), each optimisation iteration is characterised by a high computational cost if complex flow modelling is considered. In this context, the improvement of optimisation algorithm efficiency is crucial. In [2] a multilevel strategy has been defined to make the convergence rate of a gradient-based ...

Shape optimization for aerodynamic noise control

Noise generated by turbulent boundary layers near the trailing edge of lifting surfaces continues to pose a challenge for many applications. Much of the previous work on this topic has focused on development of accurate computational methods for the prediction of trailing edge noise. For instance, aeroacoustic calculations of the flow over an airfoil using large-eddy simulation (LES) and aeroac...

Parametric Deformation of Discrete Geometry for Aerodynamic Shape Design

We present a versatile discrete geometry manipulation platform for aerospace vehicle shape optimization. The platform is based on the geometry kernel of an open-source modeling tool called Blender and offers access to four parametric deformation techniques: lattice, cage-based, skeletal, and direct manipulation. Custom deformation methods are implemented as plugins, and the kernel is controlled...

Aerodynamic Design Optimisation for Complex Geometries Using Unstructured Grids